java114-Calendar类方法before

import java.text.DateFormat;
 import java.text.SimpleDateFormat;
 import java.util.Date;
 //员工信息类
 //date类
 public class test50 {
     private String name;
     private String sex;
     private Date birth;
     public void showme(){
         System.out.println(this.getName());
         System.out.println(this.getSex());
        // System.out.println(DateFormat.getDateInstance().format(this.getBirth()));
         //System.out.println(this.getBirth());
         SimpleDateFormat sdf=new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");
         String data=sdf.format(birth);
         System.out.println(data);
     }
     public void setName(String name) {
         this.name = name;
     }
     public String getName() {
         return name;
     }
     public void setSex(String sex) {
         this.sex = sex;
     }
     public String getSex() {
         return sex;
     }
     public void setBirth(Date birth) {
         this.birth = birth;
     }
     public Date getBirth(Date birth) {
         return this.birth;
     }
 }
 测试类package com.zx;
 import java.util.Calendar;
 import java.util.Scanner;
 import java.util.Date;
 public class test54 {
     public static void main(String[] args){
         Scanner in=new Scanner(System.in);
         test50 emp=new test50();
         test50 emp1=new test50();
         System.out.println("请输入第一个员工的姓名");
         emp.setName(in.next());
         System.out.println("请输入第一个员工的出生年份");
         int year=in.nextInt();
         System.out.println("请输入第一个员工的出生月份");
         int month=in.nextInt();
         System.out.println("请输入第一个员工的出生日期");
         int date=in.nextInt();
         Calendar cal=Calendar.getInstance();
         cal.set(Calendar.YEAR,year);
         cal.set(Calendar.MONTH,month-1);
         cal.set(Calendar.DATE,date);
         Date birth=cal.getTime();
         emp.setBirth(birth);
         emp.showme();
         System.out.println("请输入第二个员工的姓名");
         emp1.setName(in.next());
         System.out.println("请输入第二个员工的出生年份");
         int year1=in.nextInt();
         System.out.println("请输入第二个员工的出生月份");
         int month1=in.nextInt();
         System.out.println("请输入第二个员工的出生日期");
         int date1=in.nextInt();
         Calendar cal1=Calendar.getInstance();
         cal1.set(Calendar.YEAR,year1);
         cal1.set(Calendar.MONTH,month1-1);
         cal1.set(Calendar.DATE,date1);
         Date birth1=cal1.getTime();
         emp1.setBirth(birth1);
         emp1.showme();
         System.out.println(cal.before(cal1));
     }
 }