摘要：package 成绩;public class Grade { private double chinese; //语文成绩 private double math; //数学成绩 private double english; //英语成绩 public Grade(double chinese, 阅读全文

摘要：package 账户管理;import java.text.SimpleDateFormat;import java.util.Date;public class Zhanghu { private String _account; private String _name; private Str 阅读全文