摘要:
package LHB.inherit; public class Electricityfees { private int lastmonth,thismonth;/*上月电表读数,本月电表读数*/ public Electricityfees() { } public Electricityfees(int lastmonth,int th... 阅读全文
摘要:
package fkw; public class music { public static void tune(instrument i){ i.play(); } public static void main(String args[]){ music m=new music(); wind 阅读全文