java--用一个对象实现集合

首先先建立一个类：

package collection;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;

public class Employ {//javabean 实体类  java豆 只包含属性和
     private int id;
     private String name;
     private int salary;
     private String department;
     private Date hiredata;

     DateFormat format=new SimpleDateFormat("yyyy-yy");

    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }

    public Employ(int id, String name, int salary, String department,
            String hiredata) {
        super();
        this.id = id;
        this.name = name;
        this.salary = salary;
        this.department = department;
        //this.hiredata = hiredata;
        DateFormat format=new SimpleDateFormat("yyyy-yy");
        try {
            this.hiredata=format.parse(hiredata);
        } catch (Exception e) {
            // TODO: handle exception
        }
    }
    public Employ() {
        // TODO Auto-generated constructor stub
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getSalary() {
        return salary;
    }
    public void setSalary(int salary) {
        this.salary = salary;
    }
    public String getDepartment() {
        return department;
    }
    public void setDepartment(String department) {
        this.department = department;
    }
    public Date getHiredata() {
        return hiredata;
    }
    public void setHiredata(Date hiredata) {
        this.hiredata = hiredata;
    }

}

测试主函数：

package collection;

import java.util.ArrayList;

public class Datacuncu {     public static void main(String[] args) {    	 //一行记录一个对象来封装	Employ e=new Employ(0301,"kl",3000,"yc","2007-10");	Employ e1=new Employ(0301,"kla",3200,"ycs","2007-10");	Employ e2=new Employ(0301,"kls",3500,"yca","2007-10");	ArrayList<Employ>list=new ArrayList<Employ>();	list.add(e);	list.add(e1);	list.add(e2);	printEmploy(list); }     public static void  printEmploy(ArrayList<Employ> list) {		for (int i = 0; i < list.size(); i++) {		System.out.println(list.get(i).getName());		System.out.println(list.get(i).getHiredata());		System.out.println(list.get(i).getDepartment());		}	}}

运行结果：