1 /*
   2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 interface InterfaceA {
  25     public void Method1();
  26     public void Method2();
  27 }
  28 
  29 class ClassA implements InterfaceA {
  30     public void Method1() {
  31         System.out.println("ClassA's Method1");
  32     }
  33     public void Method2() {
  34         System.out.println("ClassA's Method2");
  35     }
  36     public void Method3() {
  37         System.out.println("ClassA's Method3");
  38     }
  39     public void Method4() {
  40         System.out.println("ClassA's Method4");
  41     }
  42 }
  43 
  44 public class ClassB extends ClassA {
  45     public void Method1() {
  46         System.out.println("ClassB's Method1");
  47     }
  48     public void Method3() {
  49         System.out.println("ClassB's Method3");
  50     }
  51     public static void main(String[] args) throws Exception {
  52         ClassB classBObj = new ClassB();
  53         classBObj.Method1();
  54         classBObj.Method2();
  55         classBObj.Method3();
  56         classBObj.Method4();
  57         ClassA classAObj = new ClassA();
  58         classAObj.Method1();
  59         classAObj.Method2();
  60         classAObj.Method3();
  61         classAObj.Method4();
  62     }
  63 }