What is Concrete Class in Java

What is Concrete Class in Java?

It is the class which is used to implement the functionality of abstract class and interface is called a concrete class.
It is similar to a normal class but it will be associated with the interface method and abstract class Method.
interface A
{
  void fun();
}
class B implements A
{
  public void fun()
{
  }
}

B is called a concrete class.

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