Array Concept in Java, Array in Java, What is Array? Jagged Array, Multidimensional array in java?
What is an Array:-
It is a collection of elements of similar data type, array store element using proper sequence, base index of the array will be started from 0 to size-1.
The array is also called the primary data structure of Java, Array is used to provide data arrangement using the linear data structure.
Syntax of Array:-
Datatype arrayname[] = new Datatype[size]
Datatype [] arrayname = new Datatype[size]
Datatype arrayname[] = new Datatype[size]
Datatype [] arrayname = new Datatype[size]
Datatype arrayname[] = {value1,value2,value,....}
int arr[] = new int[5];
int [] arr = new int[5];
Array basic program to fixed elements size?
int [] arr = new int[5];
Array basic program to fixed elements size?
1) Integer Type Array:-
class ArrExample
{
public static void main(String args[])
{
int [] arr = {12,23,34,11,67};
for(int i=0;i<arr.length;i++)
{
System.out.println(arr[i]);
}
}
}
2) Char Type Array:-
class ArrExample
{
public static void main(String args[])
{
char [] arr = {'1','A','@','$','_'};
for(int i=0;i<arr.length;i++)
{
System.out.println(arr[i]);
}
}
}
User Input
import java.util.Scanner;
class DynamicArray
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
System.out.println("Enter size of array");
int num;
num = sc.nextInt();
char arr[] = new char[num];
for(int i=0;i<num;i++)
{
System.out.println("Enter element for "+i+ " index");
arr[i]=sc.next().charAt(0);
}
System.out.println("Array elements are");
for(int i=0;i<num;i++)
{
System.out.println(arr[i]);
}
}
}
3) String type Array
class ArrExample
{
public static void main(String args[])
{
String [] arr = {"C","Java","PHP","iOS","Android"};
for(int i=0;i<arr.length;i++)
{
System.out.println(arr[i]);
}
}
}
With User Input
import java.util.Scanner;
class DynamicArray
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
System.out.println("Enter size of array");
int num;
num = sc.nextInt();
String arr[] = new String[num];
for(int i=0;i<num;i++)
{
System.out.println("Enter element for "+i+ " index");
arr[i]=sc.next();
}
System.out.println("Array elements are");
for(int i=0;i<num;i++)
{
System.out.println(arr[i]);
}
}
}
4) Object type Array Example in Java:-
class ArrExample
{
public static void main(String args[])
{
Object [] arr = {"C",1,true,12.0,1.2F};
for(int i=0;i<arr.length;i++)
{
System.out.println(arr[i]);
}
}
}
Advantage of the array:-
1) We can easily search and sort the elements of the array because the array stores data using the proper sequence.2) Array provides contiguous memory allocation hence we can reduce the extra memory gap.
3) We can store multiple elements using a single array variable which reduces the extra business code of an application.
The disadvantage of the array:-
1) Array size is fixed
2) we can not add, and destroy array elements dynamically.
1) Array size is fixed
2) we can not add, and destroy array elements dynamically.
these limitation has been solved by the Collection Framework.
Type of array:-
1 Single Dimension:-
1 Single Dimension:-
We can store elements using rows, the base index of the array element will be started from 0 to size-1.
Datatype arrayname[] = new Datatype[];
Datatype [] arrayname = new Datatype[];
Program of Array:-;
Datatype [] arrayname = new Datatype[];
Program of Array:-;
Question WAP to store and display elements into the array?
Answer:-
import java.util.Scanner;
class ArrDemo
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int size;
System.out.println("Enter size of array");
size=sc.nextInt();
int arr[] = new int[size];
for(int i=0;i<size;i++)
{
System.out.println("enter element for "+i+" index");
arr[i]=sc.nextInt();
}
for(int i=0;i<size;i++)
{
System.out.println(arr[i]);
}
}
WAP to calculate the sum of array elements?
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int size;
System.out.println("Enter size of array");
size=sc.nextInt();
int arr[] = new int[size];
for(int i=0;i<size;i++)
{
System.out.println("enter element for "+i+" index");
arr[i]=sc.nextInt();
}
for(int i=0;i<size;i++)
{
System.out.println(arr[i]);
}
}
WAP to calculate the sum of array elements?
import java.util.Scanner;
class ArrExample
{
public static void main(String args[])
{
int size;
int sum=0;
System.out.println("Enter size");
Scanner sc = new Scanner(System.in);
size=sc.nextInt();
int arr[] = new int[size];
for(int i=0;i<size;i++)
{
System.out.println("Enter element for "+i+" index");
arr[i]=sc.nextInt();
}
for(int i=0;i<size;i++)
{
sum=sum+arr[i];
System.out.println(arr[i]);
}
System.out.println(sum);
}
}
ASSIGNMENT:-1) WAP to sort the elements of the array in ascending order?
class SortArr
{
public static void main(String args[])
{
int [] arr = {12,23,45,10,11,89,21};
int num;
for(int i=0;i<arr.length;i++)
{
for(int j=i+1;j<arr.length;j++)
{
if(arr[i]>arr[j])
{
num = arr[i];
arr[i]=arr[j];
arr[j] = num;
}
}
System.out.println(arr[i]);
}
}
}
2) WAP to find the max and second max element in an array?
3) WAP to merge two arrays in one array?
4) WAP to display duplicate elements in an array?
1,1,2,3,4,5,2,7,11
1,1,2,3,4,5,2,7,11
class UniqueArr
{
public static void main(String args[])
{
int arr[] = {1, 2, 1, 2,1, 3, 4, 5, 2, 5, 2};
for(int i=0;i<arr.length-1;i++)
{
int c=0;
for(int k=0;k<i;k++)
{
if(arr[i]==arr[k])
{
c++;
break;
}
}
if(c==0)
{
for(int j=i+1;j<arr.length;j++)
{
if(arr[i]==arr[j] )
{
System.out.println(arr[i]);
break;
}
}
}
}
}
}
5) WAP to display unique elements in an array?
2 3 4 5 7 11 11 2 5 o/p 3 4 7
6) WAP to display prime elements in the array?
2 3 4 5 7 11 11 2 5 o/p 3 4 7
6) WAP to display prime elements in the array?
The solution to this program:-
import java.util.Scanner;
class ArrDemo
{
public static void main(String args[])
{
int size;
Scanner sc = new Scanner(System.in);
System.out.println("Enter size");
size=sc.nextInt();
int arr[] = new int[size];
for(int i=0;i<size;i++)
{
System.out.println("Enter elements ");
arr[i]=sc.nextInt();
}
for(int i=0;i<size;i++)
{
int c=0;
for(int j=1;j<=arr[i];j++)
{
if(arr[i]%j==0)
c++;
}
if(c==2)
System.out.println(arr[i]);
}
}
}
Optimize program of Prime Number?
import java.util.Scanner;
class ArrDemo
{
public static void main(String args[])
{
int size,i,j;
Scanner sc = new Scanner(System.in);
System.out.println("Enter size");
size=sc.nextInt();
int arr[] = new int[size];
for(i=0;i<size;i++)
{
System.out.println("Enter elements ");
arr[i]=sc.nextInt();
}
for(i=0;i<size;i++)
{
for(j=2;j<arr[i]/2;j++)
{
if(arr[i]%j==0)
break;
}
if(j==(int)(arr[i]/2))
System.out.println(arr[i]);
}
}
}
2)Multi-Dimension:- using this array we can store elements using rows and columns, it provides a matrix pattern to display elements.
It will be used to arrange data based on rows and columns, for example, if we have 3 different sections and we want to evaluate the marks of students for each section then we prefer a multidimensional array.
Syntax of MultiDimension Array;-
Datatype arrayname[][] = new Datatype[row][col];
int arr[][] = new int[3][2];
Program Explanation of multidimensional array;-
int arr[][] = new int[3][2];
Program Explanation of multidimensional array;-
With user input:-
import java.util.Scanner;
class ArrDemo
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int r,c;
System.out.println("Enter size of row");
r=sc.nextInt();
System.out.println("Enter size of column");
c=sc.nextInt();
int arr[][] = new int[r][c];
for(int i=0;i<r;i++)
{
for(int j=0;j<c;j++)
{
System.out.println("enter element for "+i+j+" index");
arr[i][j]=sc.nextInt();
}
}
for(int i=0;i<r;i++)
{
for(int j=0;j<c;j++)
{
System.out.print(arr[i][j]+" ");
}
System.out.println();
}
}
}
class ArrDemo
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int r,c;
System.out.println("Enter size of row");
r=sc.nextInt();
System.out.println("Enter size of column");
c=sc.nextInt();
int arr[][] = new int[r][c];
for(int i=0;i<r;i++)
{
for(int j=0;j<c;j++)
{
System.out.println("enter element for "+i+j+" index");
arr[i][j]=sc.nextInt();
}
}
for(int i=0;i<r;i++)
{
for(int j=0;j<c;j++)
{
System.out.print(arr[i][j]+" ");
}
System.out.println();
}
}
}
Without user input:-
class Matrix
{
public static void main(String args[])
{
int arr[][] = {{1,2},{3,5}};
for(int i=0;i<2;i++)
{
for(int j=0;j<2;j++)
{
System.out.print(arr[i][j]);
}
System.out.println();
}
}
}
Program of MultiDimenion Array;-1) WAP to perform multiplication of the matrix?
2) WAP to count the total prime element in the matrix?
3) WAP to find the max element of each row of the matrix?
The solution of max element for each row in the matrix:-
package oops;
import java.util.Scanner;
public class ArrayExample {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int r,c;
System.out.println("Enter rows");
r = sc.nextInt();
System.out.println("Enter column");
c=sc.nextInt();
int arr[][] = new int[r][c];
for(int i=0;i<r;i++)
{
for(int j=0;j<c;j++)
{
System.out.println("Enter element for "+i+j+ "index");
arr[i][j] = sc.nextInt();
}
}
System.out.println("Matrix elements is");
for(int i=0;i<r;i++)
{
int max=0;
for(int j=0;j<c;j++)
{
if(max<arr[i][j])
{
max=arr[i][j];
}
System.out.print(arr[i][j]);
}
System.out.println("maximum elements is "+max);
System.out.println();
}
}
}
Limitation of Multi dimension array:-
The number of row elements and column elements will be equal to the matrix. if we want to store a dissimilar number of elements for each row then a multi-dimension array will be failed the problem will solve by a Jagged Array.
3 Jagged Array:-
Jagged is the collection of heterogeneous rows, we can provide a different number of column elements in the jagged row.
Java provides a Jagged array Structure similar to a multidimensional array but Jagged array contains a different number of column elements for each row but multi-dimension array contains the same number of column elements for each row.
Java provides a Jagged array Structure similar to a multidimensional array but Jagged array contains a different number of column elements for each row but multi-dimension array contains the same number of column elements for each row.
Example of a jagged array
1
2 3 4
2 3
5 6 7 8
in this example, a Jagged array contains four rows and for the first row one element, the second row three elements, the third row only two elements, and the fourth row contain four elements.
Syntax of Jagged Array:-
Datatype arrayname[][] = new Datatype[row][];
int arr[][] = new int[4][];
arr[0] = new int[1];
arr[1] = new int[3];
arr[2]= new int[2];
int arr[][] = new int[4][];
arr[0] = new int[1];
arr[1] = new int[3];
arr[2]= new int[2];
arr[3]= new int[4];
Normal Jagged Array Example:-
Normal Jagged Array Example:-
Example of Jagged Array:-
import java.util.Scanner;
class JaggedArr
{
public static void main(String args[])
{
int r,c;
Scanner sc = new Scanner(System.in);
System.out.println("Enter number of rows");
r=sc.nextInt();
int arr[][] = new int[r][];
for(int i=0;i<r;i++)
{
System.out.println("enter number of column elements for row "+i);
c=sc.nextInt();
arr[i]=new int[c];
for(int j=0;j<c;j++)
{
System.out.println("enter element for "+i+j+" index");
arr[i][j]=sc.nextInt();
}
}
for(int i=0;i<r;i++)
{
for(int j=0;j<arr[i].length;j++)
{
System.out.print(arr[i][j]+" ");
}
System.out.println();
}
}
}
4 Object Array:-
The object is the superclass in java hence it can contain all data type elements using proper sequence.
import java.util.Scanner;
class JaggedArr
{
public static void main(String args[])
{
int r,c;
Scanner sc = new Scanner(System.in);
System.out.println("Enter number of rows");
r=sc.nextInt();
int arr[][] = new int[r][];
for(int i=0;i<r;i++)
{
System.out.println("enter number of column elements for row "+i);
c=sc.nextInt();
arr[i]=new int[c];
for(int j=0;j<c;j++)
{
System.out.println("enter element for "+i+j+" index");
arr[i][j]=sc.nextInt();
}
}
for(int i=0;i<r;i++)
{
for(int j=0;j<arr[i].length;j++)
{
System.out.print(arr[i][j]+" ");
}
System.out.println();
}
}
}
4 Object Array:-
The object is the superclass in java hence it can contain all data type elements using proper sequence.
It is the collection of heterogeneous elements using this array we can store dissimilar types of elements
Object arrayname [] = {value1,value2,value3,....}
Object arr[] = {12,"hello",12.34,true};
class ObjectArr
{
public static void main(String args[])
{
Object arr[] = {1001,"manish","CS",45000};
for(int i=0;i<arr.length;i++)
{
System.out.println(arr[i]);
}
for(Object o:arr)
{
System.out.println(o);
}
}
}
Multidimensional Array:-
Object arrayname [] = {value1,value2,value3,....}
Object arr[] = {12,"hello",12.34,true};
class ObjectArr
{
public static void main(String args[])
{
Object arr[] = {1001,"manish","CS",45000};
for(int i=0;i<arr.length;i++)
{
System.out.println(arr[i]);
}
for(Object o:arr)
{
System.out.println(o);
}
}
}
Multidimensional Array:-
class ObjectArr
{
public static void main(String args[])
{
Object arr[][] = {{true,12,12.34},{12.34F,"Abc",'a'}};
for(int i=0;i<2;i++)
{
for(int j=0;j<3;j++)
{
System.out.print(arr[i][j] + " ");
}
System.out.println();
}
}
}
Foreach Loop in Java:-
Note:- for each is used to display the elements of array and collection only .it is the modified form of for loop.
for(normalvar : arrayvariable)
{
System.out.println(normalvar);
}
array value will be copied to a variable.
Note:- for each is used to display the elements of array and collection only .it is the modified form of for loop.
for(normalvar : arrayvariable)
{
System.out.println(normalvar);
}
array value will be copied to a variable.
for each loop aways will be used to display the element of array and collection. it is also called modified for a loop.
Example of Foreach Loop:-
class ObjectArr
{
public static void main(String args[])
{
int arr[] = {1,34,45,56,67,89,11};
for(int k:arr)
{
System.out.println(k);
}
Object arr1[][] = {{true,12,12.34},{12.34F,"Abc",'a'}};
for(Object k[]:arr1)
{
for(Object l:k)
{
System.out.print(l + " ");
}
System.out.println();
}
}
}
Array Practice Program?
Q1) WAP to find max and second max char in String?
String s = "hello"; output o is the max char and l is the second max
Q2) WAP to find second max prime elements in the jagged array?
Q3) WAP to sort only odd elements in an array?
12 21 34 56 67 89 3 88 7
o/p 12 3 34 56 7 21 67 88
MOST Important Array Interview Questions for Interview?
Check if a key is present in every segment of size k in an array
Find the minimum and maximum element in an array
Write a program to reverse the array
Write a program to sort the given array
Find the Kth largest and Kth smallest number in an array
Find the occurrence of an integer in the array
Sort the array of 0s, 1s, and 2s
Range and Coefficient of array
Move all the negative elements to one side of the array
Find the Union and Intersection of the two sorted arrays
Level 2
Write a program to cyclically rotate an array by one
Find the missing integer
Count Pairs with given sum
Find duplicates in an array
Sort an Array using the Quicksort algorithm
Find common elements in three sorted arrays
Find the first repeating element in an array of integers
Find the first non-repeating element in a given array of integers
Find the largest three elements in an array Time
Rearrange the array in alternating positive and negative items
Find if there is any subarray with sum equal to zero
Find Largest sum contiguous Subarray
Find the factorial of a large number
Find Maximum Product Subarray
Find longest consecutive subsequence
Find the minimum element in a rotated and sorted array
Find all elements that appear more than N/K times
GCD of given index ranges in an array
Minimize the maximum difference between the heights
Minimum number of jumps to reach the end
Find the two repetitive elements in a given array
Find a triplet that sums to a given value
Construct a N*M matrix from the user input
Find the row with the maximum number of 1’s
Print the matrix in a Spiral manner
Find whether an array is a subset of another array
Implement two Stacks in an array
Majority Element
Wave Array
Trapping Rainwater
Level 3
Maximum Index
Max sum path in two arrays
Find Missing And Repeating
Stock buy and sell Problem
Pair with given sum in a sorted array
Chocolate Distribution Problem
Longest Consecutive Subsequence
Print all possible combinations of r elements in a given array
public class UniqueElementInArray {
ردحذفpublic static void main(String[] args) {
int arr[]= {1,1,2,3,4,4,4,5,6,7,8,8};
for(int i=0;i<arr.length;i++)
{
int c=0;
for(int j=0;j<arr.length;j++)
{
if(arr[i]==arr[j]&&i!=j)
c++;
}
if(c==0)
System.out.println(arr[i]);
}
}
}
WAP to perform multiplication of the matrix?
ردحذفpublic class MultiMatrix {
public static void main(String[] args) {
int a[][]= {{1,1,1},{2,2,2},{3,3,3}};
int b[][]= {{1,1,1},{2,2,2},{3,3,3}};
int c[][]=new int[3][3];
for(int i=0;i<3;i++) {
for(int j=0;j<3;j++) {
c[i][j]=0;
for(int k=0;k<3;k++)
{
c[i][j]+=a[i][k]*b[k][j];
}
System.out.print(c[i][j]+" ");
}
System.out.println();
}
}
}
WAP to find the max and second max element in an array?
ردحذفpublic class MaxAndSecondMaxInArray {
public static void main(String[] args) {
int nums[]= {4,34,75,3,45,1,100,23};
int maxOne = 0;
int maxTwo = 0;
for(int i=0;i<nums.length; i++)
{
if(maxOne<nums[i])
{
maxTwo = maxOne;
maxOne = nums[i];
}
else if(maxTwo<nums[i])
{
maxTwo = nums[i];
}
}
System.out.println("max number:" + maxOne);
System.out.println("second max number" + maxTwo);
}
}
WAP to sort the elements of the array in ascending order?
ردحذفpublic class AssendingArray {
public static void main(String[] args) {
int[] arr=new int[] {5,2,8,7,1};
int temp=0;
System.out.println("element of array");
for(int i=0;iarr[j])
{
temp=arr[i];
arr[i]=arr[j];
arr[j]=temp;
}
}
}
System.out.println();
System.out.println("element of array");
for(int i=0;i<arr.length;i++)
{
System.out.print(arr[i]+" ");
}
}
}
import java.util.Scanner;
ردحذفclass arr
{
public static void main(String[]arg)
{
Scanner sc=new Scanner(System.in);
System.out.println("enter the size of the array");
int size=sc.nextInt();
int arr[]=new int[size];
for(int i=0; i<size; i++)
{
System.out.println("enter the elements for the size"+i);
arr[i]=sc.nextInt();
}
for(int j=0; j<size; j++)
{
System.out.println("array is" +arr[j]);
}
}
}
import java.util.Scanner;
ردحذفclass arr
{
public static void main(String[]arg)
{
int sum=0;
Scanner sc=new Scanner(System.in);
System.out.println("ENTER THE ARRAY NO");
int size=sc.nextInt();
int arr[]=new int[size];
for(int i=0; i<size; i++)
{
System.out.println("enter the array no for size=" +i);
arr[i]=sc.nextInt();
}
for(int j=0; j<size; j++)
{
System.out.println("array =" +arr[j]);
sum=sum+arr[j];
}
System.out.println("sum of array=" +sum);
}
}
/* WAP to find the max and second max element in an array*/
ردحذفimport java.util.Scanner;
class SecondMax
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
System.out.println("Enetr size of array ");
int size = sc.nextInt();
int arr[] = new int[size];
for(int i = 0; i i; i++)
{
if(arr[i]>max)
max = arr[i];
}
System.out.println("max = " +max);
int smallest = arr[0];
for(int i =0; size> i; i++)
{
if(arr[i]<smallest)
smallest = arr[i];
}
System.out.println("smallest = " +smallest);
int secondmax = smallest;
for(int i =0; size> i; i++)
{
if(arr[i] != max && arr[i]>secondmax)
secondmax = arr[i];
}
System.out.println("secondmax = " +secondmax);
}
}
/* WAP to sort the elements of the array in ascending order?*/
ردحذفclass Asending
{
public static void main(String args[])
{
int a[] = {63,45,12,16,25,28,48,42};
int temp;
for(int i =0; ia[j])
{
temp = a[i];
a[i] = a[j];
a[j] = temp;
}
}
System.out.println(" " +a[i]);
}
}
}
/* WAP to perform multiplication of the matrix?*/
ردحذفimport java.util.Scanner;
class ArrayMultiplication
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int arr1[][] = new int[3][3];
int arr2[][] = new int[3][3];
int mul[][] = new int[3][3];
System.out.println("Enter element for first matrix");
for(int i = 0; i<3; i++)
{
for(int j =0; j<3; j++)
{
arr1[i][j] = sc.nextInt();
//System.out.println("["+i+"]["+j+"]" );// this line show the position for arr1
}
}
System.out.println("First Matrix");
for(int i = 0; i<3; i++) // print matrix for arr1
{
for(int j =0; j<3; j++)
{
System.out.print(arr1[i][j] + " ");
}
System.out.println();
}
//code for second matrix
System.out.println("Enter element for Second matrix");
for(int i = 0; i<3; i++)
{
for(int j =0; j<3; j++)
{
arr2[i][j] = sc.nextInt();
//System.out.println("["+i+"]["+j+"]" );// this line show the position for arr2
}
}
System.out.println("Second matrix");
for(int i = 0; i<3; i++) // print matrix for arr2
{
for(int j =0; j<3; j++)
{
System.out.print(arr2[i][j] + " ");
}
System.out.println();
}
// code for addition of two matrix
for(int i = 0; i<3; i++)
{
for(int j =0; j<3; j++)
{
mul[i][j] = arr1[i][j]*arr2[i][j];
}
}
System.out.println("Matrix Multiplication = ");
for(int i = 0; i<3; i++)
{
for(int j =0; j<3; j++)
{
System.out.print(mul[i][j] + " ");
}
System.out.println();
}
}
}
import java.util.Scanner;
ردحذفpublic class Main
{
public static void main(String[] args) {
int size;
Scanner sc = new Scanner(System.in);
System.out.println("enter the size ");
size=sc.nextInt();
int arr[]=new int[size];
for(int i=0;i<=size;i++)
{
System.out.println("enter the elementof"+i+"index");
arr[i]=sc.nextInt();
}
for(int i=0;i<=size;i++)
{
System.out.println(arr[i]);
}
}
/******************************************************************************
ردحذفOnline Java Compiler.
Code, Compile, Run and Debug java program online.
Write your code in this editor and press "Run" button to execute it.
*******************************************************************************/
import java.util.Scanner;
class Main
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int size,sum=0;
System.out.println("Enter size of array");
size=sc.nextInt();
int arr[] = new int[size];
for(int i=0;i<size;i++)
{
System.out.println("enter element for "+i+" index");
arr[i]=sc.nextInt();
}
for(int i=0;i<size;i++)
{
int c=0;
for(int j=1;j<=arr[i];j++)
{
if(arr[i]%j==0)
c++;
}
if(c==2)
System.out.println(arr[i]);
}
}
}
public class Main
ردحذف{
public static void main(String[] args) {
int arr[]={2,4,5,1,2,5,64,4};
for(int i=0;i<arr.length;i++)
{
int c=0;
for(int k=0;k<i;k++){
if(arr[i]==arr[k]){
c++;
}
}
for(int j=i+1;j<arr.length;j++)
{
if(arr[i]==arr[j]){
c++;
if(c==1)
{
System.out.print(arr[i]);
}
System.out.println();
}
}
}
}
}
java.util.Scanner;
ردحذفpublic class Main
{
public static void main(String[] args) {
int r,c;
Scanner sc=new Scanner (System.in);
System.out.println("enter the row");
r=sc.nextInt();
System.out.println("enter the colume");
c=sc.nextInt();
int arr[][]=new int [r][c];
for(int i=0;i<r;i++)
{
for(int j=0;j<c;j++)
{
System.out.println("enter the element if"+i+j+"index");
arr[i][j]=sc.nextInt();
}
}
for(int i=0;i<r;i++)
{
for(int j=0;j<c;j++)
{
System.out.print(arr[i][j]+" ");
}
System .out.println(" ");
}
}
}
public class Main
ردحذف{
public static void main(String[] args) {
int x[][]={{1,1,1},{2,2,2},{3,3,3}};
int y[][]={{1,1,1},{2,2,2},{3,3,3}};
int z[][]= new int[3][3];
for(int i=0;i<3;i++)
{
for(int j=0;j<3;j++)
{
z[i][j]=0;
for(int k=0;k<3;k++){
z[i][j]=x[i][k]*y[k][j];
}
System.out.print(z[i][j]+" ");
}
System.out.println(" ");
}
}
}
WAP to find the max and second max and third max and fourth element in an array?
ردحذف//
import java.util.Scanner;
class Array
{
public static void main(String args[])
{
int max =0;
int smax =0;
int tmax=0;
int fmax = 0;
Scanner sc = new Scanner(System.in);
int size;
System.out.println("Enter size of array");
size=sc.nextInt();
int arr[] = new int[size];
for(int i=0;i<size;i++)
{
System.out.println("enter element for "+i+" index");
arr[i]=sc.nextInt();
}
for(int i=0;i<size;i++)
{
if(max<arr[i])
{
fmax=tmax;
tmax=smax;
smax=max;
max=arr[i];
}
else if(smax<arr[i])
{
fmax=tmax;
tmax=smax;
smax=arr[i];
}
else if(tmax<arr[i])
{
fmax = tmax;
tmax=arr[i];
}
else if(fmax<arr[i])
{
fmax=arr[i];
}
}
System.out.println("max "+max);
System.out.println("secondmax "+smax);
System.out.println("thirdmax "+tmax);
System.out.println("fourthmax "+fmax);
}
}
WAP to find the maximum second maximum third maximum and fourth maximum number??
ردحذف//
import java.util.Scanner;
class Fmax
{
public static void main(String[] args)
{
int size;
Scanner sc=new Scanner(System.in);
System.out.println("enter the size of arrray ");
size=sc.nextInt();
int ar[]=new int[size];
int max=0;
int secmax=0;
int tmax=0;
int fmax=0;
for(int i=0; i<size; i++)
{
System.out.println("enter the elements of array ");
ar[i]=sc.nextInt();
}
for(int i=0; i<size; i++)
{
if(max<ar[i])
{
fmax=tmax;
tmax=secmax;
secmax=max;
max=ar[i];
}
else if(secmax<ar[i])
{ fmax=tmax;
tmax=secmax;
secmax=ar[i];
}
else if(tmax<ar[i])
{
fmax=tmax;
tmax=ar[i];
}
else if(fmax<ar[i])
{
fmax=ar[i];
}
}
System.out.println("the maximum number is "+max);
System.out.println("the second maximum number is "+secmax);
System.out.println("the third maximum number is "+tmax);
System.out.println("the fourth maximum number is "+fmax);
}
}
//(yash panjre) WAP to calculate sum of Array
ردحذفimport java.util.Scanner;
class ArraySum
{
public static void main(String []args)
{ Scanner sc=new Scanner(System.in);
System.out.print("Enter size of Array");
int size=sc.nextInt();
int sum=0;
int arr[]=new int[size];
for(int i=0;i<size;i++)
{
System.out.print("enter at index "+i+"=");
arr[i]=sc.nextInt();
sum=sum+arr[i];
}
System.out.println("sum of array is "+sum);
}
}
import java.util.Scanner;
ردحذفclass ArraySum
{
public static void main(String []args)
{ Scanner sc=new Scanner(System.in);
System.out.print("Enter size of Array");
int size=sc.nextInt();
int sum=0;
int arr[]=new int[size];
for(int i=0;i<size;i++)
{
System.out.print("enter at index "+i+"=");
arr[i]=sc.nextInt();
sum=sum+arr[i];
}
System.out.println("sum of array is "+sum);
}
}
// WAP to sort the elements of the array in ascending order?
ردحذف// ADITYA BAGHEL
import java.util.*;
class Array21
{
static public void main(String ar[])
{
int sum=0;
Scanner sc=new Scanner(System.in);
int x=sc.nextInt();
int array[]=new int[x];
for(int i=0;iarray[j])
{
sum=array[i];
array[i]=array[j];
array[j]=sum;
}
}
}
for(int i=0;i<x;i++)
{
System.out.print(array[i]+" ");
}
}
}
// WAP to sort the elements of the array in descending order?
ردحذف// ADITYA BAGHEL
import java.util.*;
class Array21
{
static public void main(String ar[])
{
int sum=0;
Scanner sc=new Scanner(System.in);
int x=sc.nextInt();
int array[]=new int[x];
for(int i=0;i<x;i++)
{
array[i]=sc.nextInt();
}
for(int i=0;i<x;i++)
{
for(int j=i+1;j<x;j++)
{
if(array[i]<array[j])
{
sum=array[i];
array[i]=array[j];
array[j]=sum;
}
}
}
for(int i=0;i<x;i++)
{
System.out.print(array[i]+" ");
}
}
}
WAP to sort the elements of the array in ascending order?
ردحذف//Abhishek chauhan
import java.util.Scanner;
public class AscendingOrder
{
public static void main(String[] args)
{
int x, temp;
Scanner s = new Scanner(System.in);
System.out.print("Enter no. of elements you want in array:");
x = s.nextInt();
int a[] = new int[x];
System.out.println("Enter all the elements:");
for (int i = 0; i < x; i++)
{
a[i] = s.nextInt();
}
for (int i = 0; i < x; i++)
{
for (int j = i + 1; j < x; j++)
{
if (a[i] > a[j])
{
temp = a[i];
a[i] = a[j];
a[j] = temp;
}
}
}
System.out.print("Ascending Order:");
for (int i = 0; i < x - 1; i++)
{
System.out.print(a[i] + ",");
}
System.out.print(a[x - 1]);
}
}
// WAP to merge two arrays in one array?
ردحذف// ADITYA BAGHEL
import java.util.*;
class Array21
{
static public void main(String ar[])
{
Scanner sc=new Scanner(System.in);
int x=sc.nextInt();
int y=sc.nextInt();
int array[]=new int[x];
int array1[]=new int[y];
int array2[]=new int[10];
System.out.println("values for array");
for(int i=0;i<x;i++)
{
array[i]=sc.nextInt();
}
System.out.println("values for array1");
for(int i=0;i<y;i++)
{
array1[i]=sc.nextInt();
}
for(int i=0;i<5;i++)
{
array2[i]=array[i];
array2[i+5]=array1[i];
}
for(int i=0;i<10;i++)
{
System.out.print(array2[i]+" ");
}
}
}
import java.io.*;
ردحذفpublic class MergeTwoArrays2 {
public static void main(String[] args)
{
int a[] = { 30, 25, 40 };
int b[] = { 45, 50, 55, 60, 65 };
int a1 = a.length;
int b1 = b.length;
int c1 = a1 + b1;
int[] c = new int[c1];
for (int i = 0; i < a1; i = i + 1) {
c[i] = a[i];
}
for (int i = 0; i < b1; i = i + 1) {
c[a1 + i] = b[i];
}
for (int i = 0; i < c1; i = i + 1) {
System.out.println(c[i]);
}
}
}
//duplicate element
ردحذف//Abhishek singh chauhan
public class DuplicateElement {
public static void main(String[] args) {
int [] arr = new int [] {1, 2, 3, 4, 2, 7, 8, 8, 3};
System.out.println("Duplicate elements in given array: ");
for(int i = 0; i < arr.length; i++) {
for(int j = i + 1; j < arr.length; j++) {
if(arr[i] == arr[j])
System.out.println(arr[j]);
}
}
}
}
//WAP to sort the elements of the array in ascending order?
ردحذفimport java.util.Scanner;
class SortAccending
{
public static void main(String...args)
{ int temp=0;
Scanner sc=new Scanner(System.in);
int size=sc.nextInt();
int arr[]=new int[size];
for(int i=0;iarr[j])
{
temp=arr[i];
arr[i]=arr[j];
arr[j]=temp;
}
}
}
for(int i=0;i<size;i++)
{
System.out.println(" "+arr[i]);
}
}
}
//WAP to merge two arrays in one array?
ردحذفimport java.util.Scanner;
class MergeTwoArray
{
public static void main(String...args)
{ Scanner sc=new Scanner(System.in);
System.out.print("Enter size of 1st array");
int s1=sc.nextInt();
System.out.print("Enter size of 2nd array");
int s2=sc.nextInt();
int[]arr1 = new int[s1];
int[]arr2 = new int[s2];
int[]arr = new int[arr1.length+arr2.length];
int count = 0;
for(int i = 0; i < arr1.length; i++) {
System.out.print("Enter element of 1st array");
arr1[i]=sc.nextInt();
arr[i] = arr1[i];
count++;
}
for(int j = 0; j < arr2.length;j++) {
System.out.print("Enter element of 2nd array");
arr2[j]=sc.nextInt();
arr[count++] = arr2[j];
}
for(int i = 0;i < arr.length;i++) System.out.print(arr[i]+" ");
}
}
//WAP to display duplicate elements in an array?
ردحذفimport java.util.Scanner;
class DisplayDuplicateElement
{
public static void main(String...args)
{
int count=0;
Scanner sc=new Scanner(System.in);
System.out.print("Enter size of array=");
int size=sc.nextInt();
int arr1[]=new int[size];
int arr[]=new int[size];
for(int i=0;i<size;i++)
arr[i]=sc.nextInt();
for(int i=0;i<size;i++)
{
for(int j=i+1;j<size;j++)
{
if(arr[i]==arr[j])
arr1[count++]=arr[i];
}
}
for(int k=0;k<count;k++)
System.out.print(arr1[k]+" ");
System.out.println(" are duplicate numbers ");
}
}
//WAP to display duplicate elements in an array?
ردحذفimport java.util.Scanner;
class DisplayDuplicateElement
{
public static void main(String...args)
{
int count=0;
Scanner sc=new Scanner(System.in);
System.out.print("Enter size of array=");
int size=sc.nextInt();
int arr1[]=new int[size];
int arr[]=new int[size];
for(int i=0;i<size;i++)
arr[i]=sc.nextInt();
for(int i=0;i<size;i++)
{
for(int j=i+1;j<size;j++)
{
if(arr[i]==arr[j])
arr1[count++]=arr[i];
}
}
for(int k=0;k<count;k++)
System.out.print(arr1[k]+" ");
System.out.println(" are duplicate numbers ");
}
}
pritam
ردحذف//1) WAP to sort the elements of the array in ascending order?
public class Main
{
public static void main(String[] args) {
int a;
int []arr={12,11,15,18,9};
for(int i=0;iarr[j])
{
a=arr[i];
arr[i]=arr[j];
arr[j]=a;
}
}
}
for(int k=0;k<arr.length;k++)
{
System.out.print(arr[k]);
}
}
}
pritam
ردحذفWAP to display duplicate elements in an array?
public class Main
{
public static void main(String[] args) {
int a;
int []arr={1,1,2,3,4,5,5,6,7,8,8};
for(int i=0;i<arr.length;i++)
{
for(int j=i+1;j<arr.length;j++)
{
if(arr[i]==arr[j])
{
System.out.print(arr[j]);
}
}
}
}
}
// write a programe to check that array is Symmetric or Assymetric
ردحذف// ADITYA BAGHEL
import java.util.*;
class Array21
{
static public void main(String ar[])
{
int c=0;
Scanner sc=new Scanner(System.in);
int x=sc.nextInt();
int array[]=new int[x];
int array12[]=new int[x];
for(int i=0;i<x;i++)
{
array[i]=sc.nextInt();
}
for(int i=0;i<x;i++)
{
array12[i]=sc.nextInt();
}
for(int i=0;i<x;i++)
{
if(array[i]==array12[i])
{
c++;
}
else
{
c=0;
}
}
if(c==x)
{
System.out.println("Symmetric");
}
else
System.out.println("Assymetric");
}
}
// Write a programe to merge 4 array into 1 array
ردحذف// ADITYA BAGHEL
import java.util.*;
class Merge
{
static public void main(String ar[])
{
Scanner sc=new Scanner(System.in);
int x=sc.nextInt();
int c=x+x+x+x;
int array1[]=new int[x];
int array2[]=new int[x];
int array3[]=new int[x];
int array4[]=new int[x];
int array5[]=new int[c];
for(int i=0;i<x;i++)
{
array1[i]=sc.nextInt();
}
for(int i=0;i<x;i++)
{
array2[i]=sc.nextInt();
}
for(int i=0;i<x;i++)
{
array3[i]=sc.nextInt();
}
for(int i=0;i<x;i++)
{
array4[i]=sc.nextInt();
}
for(int i=0;i<x;i++)
{
array5[i]=array1[i];
array5[i+x]=array2[i];
array5[i+x+x]=array3[i];
array5[i+x+x+x]=array4[i];
}
for(int i=0;i<c;i++)
{
System.out.print(array5[i]+" ");
}
}
}
//WAP to check Array is Symmetric or not.
ردحذفimport java.util.Scanner;
class Symmetric
{
public static void main(String...args)
{
int c=0,i,j;
Scanner sc=new Scanner(System.in);
System.out.print("Enter the size of Array=");
int size=sc.nextInt();
int arr[]=new int [size];
System.out.println("Enter elements of Array:");
for( i=0;i<size;i++)
{
System.out.print("value at index"+i+"=" );
arr[i]=sc.nextInt();
}
for( i=0;i<arr.length;i++)
{
if(arr[i]!=arr[arr.length-i-1]) c++;
}
if(c==0) System.out.print("Array is Symmetric");
else System.out.print("Array is Not Symmetric");
}
}
// Write a programe to find array element using binary search algorithm
ردحذف// ADITYA BAGHEL
import java.util.*;
class Binary
{
static public void main(String ar[])
{
Scanner sc=new Scanner(System.in);
int x=sc.nextInt();
int array[]=new int[x];
int low=0;
int high=x-1,mid=0;
for(int i=0;iy)
{
high=mid-1;
}
if(low==mid)
{
System.out.println(mid);
break;
}
if(array[mid]==y)
{
System.out.println(mid);
break;
}
}
}
}
//merge 4 array in one array
ردحذفimport java.util.Scanner;
class MergeFourArray
{
public static void main(String...args)
{ int s1,s2,s3,s4,i,count=0;
Scanner sc=new Scanner(System.in);
System.out.print("Enter size of first Array=");
s1=sc.nextInt();
System.out.print("Enter size of second Array=");
s2=sc.nextInt();
System.out.print("Enter size of third Array=");
s3=sc.nextInt();
System.out.print("Enter size of fourth Array=");
s4=sc.nextInt();
int arr1[]=new int[s1];
int arr2[]=new int[s2];
int arr3[]=new int[s3];
int arr4[]=new int[s4];
int arr[]=new int[s1+s2+s3+s4];
for(i=0;i<s1;i++)
{
arr1[i]=sc.nextInt();
arr[count++]=arr1[i];
}
for(i=0;i<s2;i++)
{
arr2[i]=sc.nextInt();
arr[count++]=arr2[i];
}
for(i=0;i<s3;i++)
{
arr3[i]=sc.nextInt();
arr[count++]=arr3[i];
}
for(i=0;i<s4;i++)
{
arr4[i]=sc.nextInt();
arr[count++]=arr4[i];
}
for(i=0;i<count;i++)
System.out.print(arr[i]+" ");
}
}
//Pushpendra Sisodiya
ردحذفclass SecondElementOfArray
{
public static void main(String args[])
{
int arr1[]={2,45,67,89,4,309,567,892,1,45};
int i,j,max1=0,max2=0,max3=0;
for(i=0;i<arr1.length;i++)
{
if(max1<arr1[i])
{
max2=max1;
max1=arr1[i];
}
else if(max2<arr1[i]&&arr1[i]<max1)
{
max2=arr1[i];
}
}
System.out.println("max1 no is" +max1);
System.out.println("max2 no is" +max2);
}
}
ردحذف//Pushpendra Sisodiya
import java.util.Scanner;
class Sorting
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int arr1[]={5,7,8,3,1,9,55};
int i,j,a;
for(i=0;iarr1[j])
{
a=arr1[i];
arr1[i]=arr1[j];
arr1[j]=a;
}
}
}
for(i=0;i<arr1.length;i++)
{
System.out.println(arr1[i]);
}
}
}
//Wap to check that the array element is symmetric or not.
ردحذفimport java.util.Scanner;
class Array21
{
public static void main(String[] args)
{
Scanner sc = new Scanner(System.in);
System.out.println("Enter the no. of rows : ");
int rows = sc.nextInt();
System.out.println("Enter the no. of columns : ");
int cols = sc.nextInt();
int matrix[][] = new int[rows][cols];
System.out.println("Enter the elements :");
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < cols; j++)
{
matrix[i][j] = sc.nextInt();
}
}
if(rows != cols)
{
System.out.println("The given matrix is not a square matrix, so it can't be symmetric.");
}
else
{
boolean symmetric = true;
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < cols; j++)
{
if(matrix[i][j] != matrix[j][i])
{
symmetric = false;
break;
}
}
}
if(symmetric)
{
System.out.println("The given matrix is symmetric...");
}
else
{
System.out.println("The given matrix is not symmetric...");
}
}
sc.close();
}
}
//WAP to find array element using binary search algorithm
ردحذفimport java.util.Scanner;
class BinarySearchExample
{
public static void main(String args[])
{
int counter, num, item, array[], first, last, middle;
//To capture user input
Scanner input = new Scanner(System.in);
System.out.println("Enter number of elements:");
num = input.nextInt();
array = new int[num];
System.out.println("Enter " + num + " integers");
for (counter = 0; counter < num; counter++)
array[counter] = input.nextInt();
System.out.println("Enter the search value:");
item = input.nextInt();
first = 0;
last = num - 1;
middle = (first + last)/2;
while( first <= last )
{
if ( array[middle] < item )
first = middle + 1;
else if ( array[middle] == item )
{
System.out.println(item + " found at location " + (middle + 1) + ".");
break;
}
else
{
last = middle - 1;
}
middle = (first + last)/2;
}
if ( first > last )
System.out.println(item + " is not found.\n");
}
}
//WAP to merge two arrays in one array?
ردحذفimport java.util.Scanner;
class MergeArray
{
public static void main(String...args)
{ Scanner sc=new Scanner(System.in);
System.out.print("Enter size of 1st array");
int a1=sc.nextInt();
System.out.print("Enter size of 2nd array");
int a2=sc.nextInt();
int[]arr1 = new int[a1];
int[]arr2 = new int[a2];
int[]arr = new int[arr1.length+arr2.length];
int count = 0;
for(int i = 0; i < arr1.length; i++)
{
System.out.print("Enter element of 1st array");
arr1[i]=sc.nextInt();
arr[i] = arr1[i];
count++;
}
for(int j = 0; j < arr2.length;j++)
{
System.out.print("Enter element of 2nd array");
arr2[j]=sc.nextInt();
arr[count++] = arr2[j];
}
for(int i = 0;i < arr.length;i++)
System.out.print(arr[i]+" ");
}
}
Program to implement matrix multiplication?
ردحذفclass Matrix
{
public static void main(String args[])
{
int arr[][] = {{2,3},{4,5}};
int arr1[][] = {{1,2},{5,6}};
int arr2[][] = new int[2][2];
for(int i=0;i<2;i++)
{
for(int j=0;j<2;j++)
{
int s=0;
for(int k=0;k<2;k++)
{
s = s + arr[i][k]*arr1[k][j];
}
arr2[i][j]= s;
System.out.print(arr2[i][j] + " ");
}
System.out.println();
}
}
}
// write a programe of multiplication of matrix with expression
ردحذف// ADITYA BAGHEL
class Demo
{
static public void main(String ar[])
{
String s1="";
int array[][]={{1,1},{2,2}};
int array1[][]={{1,1},{2,2}};
int array2[][]=new int[2][2];
for(int i=0;i<2;i++)
{
for(int j=0;j<2;j++)
{
for(int k=0;k<2;k++)
{
array2[i][j]+=array[i][k]*array1[k][j];
if(k==0)
{
s1=s1+array[i][k]+"*"+array1[k][j]+" + ";
}
else if(k==1)
{
s1=s1+array[i][k]+"*"+array1[k][j]+" = ";
}
}
System.out.println(s1+""+array2[i][j]);
s1="";
}
}
System.out.println();
for(int i=0;i<2;i++)
{
for(int j=0;j<2;j++)
{
System.out.print(array2[i][j]+" ");
}
System.out.println();
}
}
}
//AKSHAY JANGDE
ردحذفclass Arrayasc
{
public static void main(String...args)
{
int arr[]={5,8,7,12,65,0};
int temp=0;
for(int i=0;i arr[j])
{
temp=arr[i];
arr[i] = arr [j];
arr[j] =temp;
}
}
}
for(int i =0 ;i<arr.length;i++)
{
System.out.println(arr[i]);
}
}
}
Display Prime Elements in Matrix?
ردحذفclass Demo
{
static public void main(String ar[])
{
String s1="";
int arr[][]={{4,3},{2,7}};
int i,j,k;
for(i=0;i<2;i++)
{
for(j=0;j<2;j++)
{
System.out.print(arr[i][j]);
for(k=2;k<arr[i][j];k++)
{
if(arr[i][j]%k==0)
break;
}
if(arr[i][j]==k)
System.out.print( "Prime is "+ arr[i][j]);
}
System.out.println();
}
}
}
//WAP to find the max and second max element in an array?
ردحذفclass Max2Array
{
public static void main(String[] args)
{
int arr[]= {5,20,90,3,545,1,300,3};
int max1 = 0;
int max2 = 0;
for(int i=0;i<arr.length; i++)
{
if(max1<arr[i])
{
max2 = max1;
max1 = arr[i];
}
else if(max2<arr[i])
{
max2= arr[i];
}
}
System.out.println("max number is" + max1);
System.out.println("second max number is" + max2);
}
}
//optimize program of unique element in an Array
ردحذفclass UniqueElement
{
public static void main(String[] args)
{
int arr[]= {1,1,1,3,4,4,4,5,6,8,8,8};
for(int i=0;i<arr.length;i++)
{
int c=0;
for(int j=0;j<arr.length;j++)
{
if(arr[i]==arr[j]&&i!=j)
c++;
}
if(c==0)
System.out.println(arr[i]);
}
}
}
//WAP to sort the elements of the array in ascending order?
ردحذفclass Ascendingorder
{
public static void main(String[] args)
{
int arr[]={52,7,5,3,1,89,45};
int i,c=0,j;
for(i=0;iarr[j]){
c=arr[i];
arr[i]=arr[j];
arr[j]=c;}}
}
for (i=0;i<arr.length;i++)
System.out.print(arr[i]+" ");
}
}
Find maximum second maximum and third maximum in jagged array ??
ردحذفimport java.util.Scanner;
class Multiplemax
{
public static void main(String[] args)
{
int i,j,col;
int ar[][]=new int[3][];
Scanner sc=new Scanner(System.in);
for(i=0; i<3; i++)
{
System.out.println("enter the number of column "+i);
col=sc.nextInt();
ar[i]=new int[col];
for(j=0; jsmax)
{
tmax=smax;
smax=ar[i][j];
}
else if(ar[i][j]>tmax)
{
tmax=ar[i][j];
}
System.out.print(ar[i][j]+" ");
}
System.out.println();
}
System.out.println("the maximum element is "+max);
System.out.println("the second maximum element is "+smax);
System.out.println("the third maximum element is "+tmax);
}
}
// WAP to find the max and second max element in an array
ردحذفclass Question {
public static void main(String[] args) {
int i,max1=0,max2=0;
int a[]= {1,34,54,6,34,3,46,7,1,3,56,7};
for(i=0;imax1) {
max2=max1;
max1=a[i];
}
}
System.out.println("Maximum - "+max1+"\nSecond maximum - "+max2);
}
}
// WAP to merge two arrays in one array
ردحذفclass Question {
public static void main(String[] args) {
int i;
int a[]= {1,34,54,6};
int b[]= {2,45,7,3};
int c[]=new int[a.length+b.length];
for(i=0;i<c.length;i++) {
if(i<a.length)
c[i]=a[i];
else
c[i]=b[i-a.length];
System.out.print(c[i]+" ");
}
}
}
// find prime no using jagged array
ردحذفclass Primejagged
{
public static void main(String[] args)
{
int arr[][]=new arr[2];
arr[0] = new int[3];
arr[1] = new int[2];
int count = 0;
for (int i = 0; i < arr.length; i++)
for (int j = 0; j < arr[i].length; j++)
arr[i][j] = count++;
System.out.println(" Jagged Array");
for (int i = 0; i < arr.length; i++)
{
for (int j = 0; j < arr[i].length; j++)
System.out.print(arr[i][j] + " ");
System.out.println();
}
}
}
//find max,second max and third max element in jagged row without using sorting.
ردحذفimport java.util.Scanner;
class Jaggedmax
{
public static void main(String args[])
{
int r,c=0;
Scanner sc=new Scanner(System.in);
System.out.println("enter no of rows");
r=sc.nextInt();
int arr[][]=new int[r][];
for(int i=0;i<r;i++)
{
System.out.println("enter no of column elements for row"+i);
c=sc.nextInt();
arr[i]=new int[c];
for(int j=0;j<c;j++)
{
System.out.println("enter element for"+i+j+"index");
arr[i][j]=sc.nextInt();
}
}
for(int i=0;i<r;i++)
{
int max=0,max1=0,max2=0;
for(int j=0;j<arr[i].length;j++)
{
if(max<arr[i][j])
{
max2=max1;
max1=max;
max=arr[i][j];
}
else if(max1<arr[i][j])
{
max2=max1;
max1=arr[i][j];
}
else if(max2<arr[i][j])
{
max2=arr[i][j];
}
}
System.out.println("maximum element is"+max +","+max1 +"," +max2);System.out.println();
}
}
}
pritam
ردحذفprogram to find maximum second maximum and third maximum in 2d array
import java.util.Scanner;
public class Main
{
public static void main(String[] args)
{
int r,c,i,j,f=0,s=0,t=0;
Scanner sc= new Scanner(System.in);
r=sc.nextInt();
c=sc.nextInt();
int a[][] = new int[r][c];
for(i=0;if)
{
t=s;
s=f;
f=a[i][j];
}
else if(a[i][j]>s)
{
t=s;
s=a[i][j];
}
else if(a[i][j]>t)
{
t=a[i][j];
}
}
}
ystem.out.println(f+" "+s+" "+t);
}
}
// programe to find maximum, second maximum and third maximum
ردحذف//ADITYA BAGHEL
import java.util.*;
class Jagged
{
static public void main(String ar[])
{
Scanner sc=new Scanner(System.in);
int r,c,i,j,k,max=0,Smax=0,Tmax=0;
System.out.println("Enter no.of rows");
r=sc.nextInt();
int array[][]=new int[r][];
for(i=0;imax)
{
Tmax=Smax;
Smax=max;
max=array[i][j];
}
else if(Smax<array[i][j])
{ Tmax=Smax;
Smax=array[i][j];
}
else if(Tmax<array[i][j])
{
Tmax=array[i][j];
}
}
System.out.print("This max,Smax,Tmax is for row "+ i +" "+"Maximum No is= " + max +","+"Second Maximum no is= "+ Smax +","+" Third Max No is= "+Tmax);
System.out.println();
}
}
}
Khushboo Sendre
ردحذفimport java.util.Scanner;
public class Array1
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int size,i;
System.out.println("Enter the size of array:");
size = sc.nextInt();
int arr[] = new int[size];
for(i=0;i<size;i++)
{
System.out.println("Enter the element: "+i+"index");
arr[i] = sc.nextInt();
}
for(i=0;i<size;i++)
{
System.out.println(arr[i]);
}
}
}
// WAP to perform multiplication of the matrix
ردحذفclass Question {
public static void main(String[] args) {
int i,k,j,temp;
int a[][]= {{2,2,2},{2,2,2},{3,3,3}};
int b[][]= {{1,1,1},{1,1,1},{1,1,1}};
int c[][]=new int[3][3];
for(i=0;i<a.length;i++) {
for(j=0;j<a.length;j++) {
temp=0;
for(k=0;k<a.length;k++) {
temp=temp+a[i][k]*b[k][i];
}
c[i][j]=temp;
System.out.print(c[i][j]+" ");
}System.out.println();
}
}
}
WAP to calculate the sum of array elements?
ردحذفkhushboo sendre
import java.util.Scanner;
public class ArraySum
{
public static void main(String args[])
{
int i,size,sum=0;
Scanner sc = new Scanner(System.in);
System.out.println("Enter the size of array:");
size = sc.nextInt();
int arr[] = new int[size];
for(i=0;i<size;i++)
{
System.out.println("Enter element of array" +i+ "index");
arr[i] = sc.nextInt();
}
for(i=0;i<size;i++)
{
sum= sum+arr[i];
System.out.println(arr[i]);
}
System.out.println(sum);
}
}
//wap to display prime element in jagged row?
ردحذفimport java.util.Scanner;
class jaggedprime
{
public static void main(String args[])
{
int r,c=0,i,j,k;
Scanner sc=new Scanner(System.in);
System.out.println("enter no of rows");
r=sc.nextInt();
int arr[][]=new int[r][];
for(i=0;i<r;i++)
{
System.out.println("enter no of column elements for row"+i);
c=sc.nextInt();
arr[i]=new int[c];
for(j=0;j<c;j++)
{
System.out.println("enter element for"+i+j+"index");
arr[i][j]=sc.nextInt();
}
}
for( i=0;i<r;i++)
{
for(j=0;j<arr[i].length;j++)
{
System.out.print(arr[i][j]+" ");
}
for(k=2;k<j;k++)
{
if(arr[i][j]%k==0)
break;
}
if(arr[i][j]==k)
System.out.print("prime is"+arr[i][j]);
}
System.out.println();
}
}
// WAP to count the total prime element in the matrix?
ردحذفclass Question {
public static void main(String[] args) {
int i,j,k,count,prime=0,temp;
int a[][]= {{2,4,2},{2,6,2},{3,3,3}};
for(i=0;i<3;i++) {
for(j=0;j<3;j++) {
count=0;
temp=a[i][j];
for(k=1;k<=a[i][j];k++) {
if(a[i][j]%k==0) {
count++;
}
}
if(count==2)
prime++;
}
}
System.out.print("prime elements in array - "+prime);
}
}
// WAP to count the total prime element in the matrix?
ردحذفclass Question {
public static void main(String[] args) {
int i,j,k,count,prime=0;
int a[][]= {{2,4,2},{2,6,2},{3,3,3}};
for(i=0;i<3;i++) {
for(j=0;j<3;j++) {
count=0;
for(k=1;k<=a[i][j];k++) {
if(a[i][j]%k==0)
count++;
}
if(count==2)
prime++;
}
}
System.out.print("prime elements in array - "+prime);
}
}
// WAP to find the max element of each row of the matrix?
ردحذفclass Question {
public static void main(String[] args) {
int i,j,k,count,max;
int a[][]= {{2,4,2},{2,6,2},{3,3,3}};
for(i=0;i<3;i++) {
max=0;
for(j=0;j<3;j++) {
if(max<a[i][j])
max=a[i][j];
}
System.out.println("Maximum elements in row "+i+" is - "+max);
}
}
}
//WAP to sort array in ascending order
ردحذفclass Sort
{
public static void main(String[] args)
{
int[] arr = new int[] {2,4,6,8,10,5,7};
System.out.println("Array elements after sorting:");
for (int i = 0; i < arr.length; i++)
{
for (int j = i + 1; j < arr.length; j++)
{
int tmp = 0;
if (arr[i] > arr[j])
{
tmp = arr[i];
arr[i] = arr[j];
arr[j] = tmp;
}
}
System.out.println(arr[i]);
}
}
}
//WAP to merge two arrays in one array
ردحذفclass MergeTwoArr {
public static void main(String[] args)
{
int a[] = { 30, 25, 40 };
int b[] = { 45, 50, 55, 60, 65 };
int a1 = a.length;
int b1 = b.length;
int c1 = a1 + b1;
int[] c = new int[c1];
for (int i = 0; i < a1; i = i + 1) {
c[i] = a[i];
}
for (int i = 0; i < b1; i = i + 1) {
c[a1 + i] = b[i];
}
for (int i = 0; i < c1; i = i + 1) {
System.out.println(c[i]);
}
}
}
WAP to sort the elements of the array in ascending order.
ردحذفKhushboo Sendre
import java.util.Scanner;
public class Sortarray
{
public static void main(String args[])
{
int temp=0, size;
Scanner sc = new Scanner(System.in);
System.out.println("Enter the size of element of array:");
size = sc.nextInt();
int arr[] = new int[size];
System.out.println("Enter the element");
for(int i=0;iarr[j])
{
temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
}
}
System.out.println("Sorting is:");
for(int i=0;i<size-1;i++)
{
System.out.println(arr[i] + " ");
}
System.out.println(arr[size-1]);
}
}
class ArrExample
ردحذف{
public static void main(String args[])
{
int arr[] = {1,13,11,45,67,89};
int arr1[] = new int[arr.length];
boolean c=true;
for(int i=0,j=arr.length-1,k=5;i<arr.length;i++,j--,k++)
{
arr1[i]= arr[j];
if(arr1[i]!=arr[i])
{
c=false;
}
}
for(int i=0;i<arr.length;i++)
{
System.out.println("Actual "+arr[i] + " Reverse "+arr1[i]);
}
if(c)
{
System.out.println("Array is equall");
}
else
{
System.out.println("Array is not equall");
}
}
}
Array Example:-
ردحذفimport java.util.Scanner;
class ArrayExample
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int arr[] = new int[5];
for(int i=0;i<arr.length;i++)
{
System.out.println("Enter element for "+i+ "index");
arr[i]=sc.nextInt();
}
int esum=0,osum=0,c1=0,c2=0;
for(int i=0;i<arr.length;i++)
{
if(arr[i]%2==0)
{
c1++;
esum = esum +arr[i];
}
else
{
c2++;
osum = osum+ arr[i];
}
}
int o[] = new int[c2];
int e[] = new int[c1];
int x=0,y=0;
for(int i=0;i<arr.length;i++)
{
if(arr[i]%2==0)
{
e[x]=arr[i];
x++;
}
else
{
o[y]=arr[i];
y++;
}
}
for(int i=0;i<e.length;i++)
{
System.out.println(e[i]);
}
System.out.println("Sum of even are "+esum);
for(int i=0;i<o.length;i++)
{
System.out.println(o[i]);
}
System.out.println("Sum of odd are"+osum);
}
}
//Find the Maximum Element of Array
ردحذفpublic class Array {
public static void main(String[] args) {
int [] arr={2,5,3,7,6,8,4,3,9,1,23};
int temp=arr[0];
for(int i=1;itemp)
{
temp=arr[i];
}
}System.out.println("Maximum element of Array is:"+temp);
}
}
//Find the Minimum Element of Array
ردحذفpublic class Array {
public static void main(String[] args) {
int [] arr={2,5,3,7,6,8,4,3,9,1,23};
int temp=arr[0];
for(int i=1;i<arr.length;i++)
{
if(arr[i]<temp)
{
temp=arr[i];
}
}System.out.println("Minimum element of Array is:"+temp);
}
}
Find the minimum and maximum element in an array?
ردحذفclass Array
{
public static void main(String[] args) {
int []a ={3,5,7,8,9,5};
int max=0;
int min=a[0];
for(int i=0;ia[i])
{
min=a[i];
}
}
System.out.println("max element is "+max);
System.out.println("max element is "+min);
}
}
ردحذفWrite a program to reverse the array?
class ReverseArray
{
public static void main(String[] args) {
int a[] ={1,2,3,4,5,6};
for(int i=0;i<6;i++)
{
System.out.println(a[i]+" ");
}
for(int j=6-1;j>=0;j--)
{
System.out.print(a[j]+" ");
}
}
}
import java.util.Scanner;
ردحذفclass SortAsc {
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
int temp = 0;
System.out.println("enter size of array");
int size=sc.nextInt();
int arr[]=new int[size];
System.out.println("Enter the Element");
for (int i = 0; i < arr.length; i++)
{
System.out.print( "element of "+ i);
arr[i]=sc.nextInt();
}
for (int i = 0; i < arr.length; i++) {
for (int j = i+1; j < arr.length; j++) {
if(arr[i] > arr[j]) {
temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
}
}
System.out.println();
System.out.println("Elements of array sorted in ascending order: ");
for (int i = 0; i < arr.length; i++) {
System.out.print(arr[i] + " ");
}
}
}
import java.util.*;
ردحذفimport java.util.Scanner;
public class SecondHighestNumber {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter array size :");
int Elements = sc.nextInt();
int arr[] = new int[Elements];
System.out.println("Enter array elements :");
for (int i = 0; i < arr.length; i++) {
arr[i] = sc.nextInt();
}
System.out.println("Array elements are" + Arrays.toString(arr));
int largest = arr[0];
int secondLargest = arr[0];
for (int i = 0; i < arr.length; i++) {
if (arr[i] > largest) {
secondLargest = largest;
largest = arr[i];
} else if (arr[i] > secondLargest) {
secondLargest = arr[i];
}
}
System.out.println("Second highest element in array is :" + secondLargest);
sc.close();
}
}
class MergeTwoArr
ردحذف{
public static void main(String args[])
{
int[] a={10,20,30};
int[] b={40,50,60,70,80,90};
int a_leng=a.length;
int b_leng=b.length;
int c_leng= a_leng+b_leng;
int[] c=new int[c_leng];
for(int i=0;i<a_leng;i++)
{
c[i]=a[i];
}
for(int i=0;i<b_leng;i++)
{
c[a_leng+i]=b[i];
}
for(int i=0;i<c_leng;i++)
{
System.out.println(c[i]);
}
}
}
Sandeep kelwa
ردحذفclass DuplicateElements
{
public static void main(String args[])
{
int arr[] = {1,2,3,4,4,3,5,5,8};
System.out.println("Duplicate elements in given array:");
for(int i=0; i<arr.length; i++)
{
for(int j=i+1; j<arr.length; j++)
{
if(arr[i]==arr[j])
System.out.println(arr[j]);
}
}
}
}
Program of Jagged Array:-
ردحذفimport java.util.Scanner;
class ArrayWrapper
{
int k;
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
int r,c;
System.out.println("Enter row");
r = sc.nextInt();
System.out.println("Enter column");
c = sc.nextInt();
Integer arr[][] = null;
arr= new Integer[r][];
for(int i=0;i<r;i++)
{
System.out.println("Enter column elements");
int col = sc.nextInt();
arr[i] = new Integer[col];
for(int j=0;j<col;j++)
{
System.out.println("Enter array item");
arr[i][j]=sc.nextInt();;
}
}
for(int i=0;i<r;i++)
{
for(int j=0;j<arr[i].length;j++)
{
System.out.print(arr[i][j]+" ");
}
System.out.println();
}
for(Integer x[]:arr)
{
for(Integer y:x)
{
System.out.print(y);
}
System.out.println();
}
}
}
WAP to reverse String Elements:-
ردحذفclass StringReverse
{
public static void main(String args[])
{
String arr[] = {"ram","manish","kapil","jaykumar"};
for(int i=0;i=0;j--)
{
d = d + s.charAt(j);
}
arr[i]=d;
}
for(String data:arr)
{
System.out.println(data);
}
}
}
class UniqueNumber {
ردحذفpublic static void main(String args[]){
int [] arr = {2, 3, 4, 5 ,7, 11, 11, 2, 5 };
for (int i= 0; i < arr.length; i++){
int count1 = 0;
for (int j= 0; j< arr.length; j++){
if(arr[i] == arr[j] ) {
count1++;
}
}
if(count1 == 1 ){
System.out.print( arr[i] +" ");
}
}
}
}
SANTOSH KUMAR PAL
ردحذف