Template mode (exam questions reuse)

Package COM. template;/*** Test Questions and Answers * @ filefile: examepaper. java * @ version: 1.0 * @ Author: sky * @ Date: 2012-7-4 * ===================================== * @ package: COM. template * @ class: * @ extend *** =====================================================* Copyright (c) 2012 colavia */public class examepaper {public void question1 () {system. out. println ("1 + 1 =? A: 0 B:-1 C: 4 D: 2 "); system. out. println ("Answer:" + answer1 ();} public void question2 () {system. out. println ("1 + 3 =? A: 0 B:-1 C: 4 D: 2 "); system. out. println ("Answer:" + answer2 ();} public void question3 () {system. out. println ("1 + 2 =? A: 3 B:-1 C: 4 D: 2 "); system. out. println ("Answer:" + answer3 ();} public void question4 () {system. out. println ("9 + 1 =? A: 0 B: 10 C: 4 D: 2 "); system. out. println ("Answer:" + answer4 ();} Public String answer1 () {return "" ;}; Public String answer2 () {return "";}; public String answer3 () {return "" ;}; Public String answer4 () {return "";};}

Package COM. template;/*** answer to the first question * @ filefile: testpaper1.java * @ version: 1.0 * @ Author: sky * @ Date: 2012-7-4 * ===================================== * @ package: COM. template * @ class: * @ extend *** =====================================================* Copyright (c) 2012 colavia */public class testpaper1 extends examepaper {@ overridepublic string answer1 () {return "A" ;}@ overridepublic string answer2 () {return "C ";} @ overridepublic string answer3 () {return "D" ;}@ overridepublic string answer4 () {return "";}}

Package COM. template;/*** answer to the second question * @ filefile: testpaper2.java * @ version: 1.0 * @ Author: sky * @ Date: 2012-7-4 * ===================================== * @ package: COM. template * @ class: * @ extend *** =====================================================* Copyright (c) 2012 colavia */public class testpaper2 extends examepaper {@ overridepublic string answer1 () {return "D" ;}@ overridepublic string answer2 () {return "";} @ overridepublic string answer3 () {return "C" ;}@ overridepublic string answer4 () {return "B ";}}

Package com. template;/*** the simulation method moves the unchanged behavior to the superclass, removing repeated code in the subclass to reflect its advantages. * The simulation method is a good code reuse platform * @ filefile: mainrun. java * @ version: 1.0 * @ Author: sky * @ Date: 2012-7-4 * ===================================== * @ package: COM. template * @ class: * @ extend *** =====================================================* Copyright (c) 2012 colavia */public class mainrun {/*** @ Param ARGs */public static void main (string [] ARGs) {examepaper paper1 = new testpaper1 (); paper1.question1 (); paper1.question2 (); paper1.question3 (); system. out. println ("===================="); examepaper paper2 = new testpaper2 (); paper2.question1 (); paper2.question2 (); paper2.question3 ();}}