When can object reference cast to interface reference
Answer: When java class implements interface it can be cast into interface reference. Please see example below:
Interface ABC.java
package com.javahonk.interfacereference; public interface ABC { void testMethod(); }
Class which implements interface ABC:
package com.javahonk.interfacereference; public class InterfaceObjectReference implements ABC { public static void main(String[] args) { ABC abc = new InterfaceObjectReference(); abc.testMethod(); } @Override public void testMethod() { System.out.println("Calling through " + "interface ojbect reference"); } }
Output:
