Interface in java

Question

interface A {
    public void eg1();
}

interface B {
    public void eg1();
}

public class SomeOtherClassName implements A, B {
    @Override
    public void eg1() {
        System.out.println("test.eg1()");
    }

}

What is the output and what occurs if method is overriden in interface?

Answer 1

• First of all it's of no use to implement both class A and B as both of them has same method signature i.e both has same method name and return type.
• Secondly you'll need a main method to run the program.

• Also in interface you can only declare the methods, the implementation has to be done in the class which implements it.

   interface A {
      public void eg1();
  }
  
  interface B {
      public void eg1();
  }
  
  public class Test implements A{
      @Override
      public void eg1() {
          System.out.println("test.eg1()");
      }
      public static void main (String args[]) {
          A a = new test();
          a.eg1();
      }
  }
  

Output : test.eg1()