摘要：一.程序代码 package error; public class Throwerror { public static void main(String[] args) throws IllegalArgumentException { Point point1=new Point (3,1); 阅读全文

摘要：声明圆锥体类，实现Area和Volume接口，计算表面积和体积，按体积比较大小 一.程序代码 public class yuanzhui extends Rectangle implements Area,Volume { private double radius; private double 阅读全文

摘要：一.程序代码 package Students; public class Person { public String name; public String birthday; public String province,city; public int count; public Perso 阅读全文