jasonwing27
发贴: 66
积分: 0
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于 2004-09-22 22:57
今天初次尝试JAVA的类,遇到一个问题。 我把原代码列出来请各位高手指教。
//DVD.java public class DVD extends Object { public String DVDtype = "体育" ; }
//Sports.java import DVD; public class Sports extends DVD { public String Sportstype = "足球" ; }
//Football.java import Sports ; public class Football extends Sports { public String Footballtype = "世界杯进球集锦" ; }
//MyDVD.java import java.io.*; import Football ; public class MyDVD { public static void main(String[] args) { Football Mydvd = new Football() ; System.out.println( "DVD种类"+Mydvd.DVDtype ) ; System.out.println( "体育系列"+Mydvd.Sportstype ) ; System.out.println( "足球系列"+Mydvd.Footballtype ) ; } }
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