Array of Interface in Java

Question

I have an interface.

public interface Module {
        void init();
        void actions();
}

What happens when i try to create an array li

Answer 1

Of course you can create an array whose type is an interface. You just have to put references to concrete instances of that interface into the array, either created with a name or anonymously, before using the elements in it. Below is a simple example which prints hash code of the array object. If you try to use any element, say myArray[0].method1(), you get an NPE.

public class Test {
 public static void main(String[] args) {
     MyInterface[] myArray = new MyInterface[10];
     System.out.println(myArray);
 }
 public interface MyInterface {
     void method1();
     void method2();
 }
}