Can an interface extend multiple interfaces in Java?


Yes, we can do it. An interface can extend multiple interfaces in Java.

Example:

interface A {
   public void test();
   public void test1();
}
interface B {
   public void test();
   public void test2();
}
interface C extends A,B {
   public void test3();
}
class D implements C {
   public void test() {
      System.out.println("Testing
");    }    public void test1() {       System.out.println("Testing1
");    }    public void test2() {       System.out.println("Testing2
");    }    public void test3() {       System.out.println("Testing3");    } } public class Main {    public static void main(String[] args) {       D d=new D();       d.test();       d.test1();       d.test2();       d.test3();    }  }

Output:

Testing

Testing1

Testing2

Testing3

Updated on: 30-Jul-2019

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