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//习题2.2 import java.util.*; class MyDate{   private int year;   private int month;   private int day;  
  public MyDate(int y,int m,int d){//构造函数,构造方法     year=y;     month=m;     day=d;  
  }//end public MyDate(int y,int m,int d)   public int getYear(){//返回年     return year;   }//end getYear()  
  public int getMonth(){//返回月     return month;   }//end getMonth()  
  public int getDay(){//返回日     return day;   }//end getDay()   }//end class MyDate class Employee{  
    private String name;     private double salary;     private MyDate hireDay;  
    public Employee(String n,double s,MyDate d){ 
 
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