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Go through this program once ... I will explain the use of interface at the end... Interface Interf { void m1(); void m2(); } class InterfaceTest implements Interf { public void m1() { System.out.println("implementation m1"); } public void m2() { System.out.println("implementation m2"); } public void m3() { System.out.print("YOU WONDER ! I knew why????? I am … Read more