package bt_lose;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

/**
 * 简单实体
 * 
 * @author botao
 * 
 */
public class User {
    @Override
    public String toString() {

        return "User: id=" + uid + "  uname=" + uname + "  upass=" + upass;
    }

    private int uid;

    private String uname;

    private String upass;

    public String getUname() {
        return uname;
    }

    public void setUname(String uname) {
        this.uname = uname;
    }

    public String getUpass() {
        return upass;
    }

    public void setUpass(String upass) {
        this.upass = upass;
    }

    public User() {

    }

    public User(int id, String name, String pass) {
        this.uid = id;
        this.uname = name;
        this.upass = pass;
    }

    public int getUid() {
        return uid;
    }

    public void setUid(int uid) {
        this.uid = uid;
    }

    public static void main(String[] args) {
        List<User> list = new ArrayList<User>();
        list.add(new User(1, "name1", "pass1"));
        list.add(new User(3, "name3", "pass3"));
        list.add(new User(2, "name2", "pass2"));
        list.add(new User(4, "name4", "pass4"));
        System.out.println("before sort");
        for (User user : list) {
            System.out.println(user);
        }
        //比较器是通过匿名类来做的
        Collections.sort(list, new Comparator<User>() {

            public int compare(User arg0, User arg1) {
                //定义如何比较
                return arg0.getUid() - arg1.getUid();
            }
        });
        System.out.println("after sort");
        for (User user : list) {
            System.out.println(user);
        }
    }
}

------解决方案--------------------
package test1.sort;

import java.util.Comparator;

public class MyComparator implements Comparator {

	public int compare(Object o1, Object o2) {
		
		MyObject obj1 = (MyObject) o1;
		MyObject obj2 = (MyObject) o2;
		
		return obj1.getStartTime().before(obj2.getStartTime())?1:0;
	}

}

package test1.sort;

import java.util.Date;

public class MyObject {
	
	private int id;
	private Date startTime;
	private String ani;
	
	public MyObject(int id,Date startTime,String ani) {
		this.id = id;
		this.startTime = startTime;
		this.ani = ani;
	}
	
	public String getAni() {
		return ani;
	}
	public void setAni(String ani) {
		this.ani = ani;
	}
	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	public Date getStartTime() {
		return startTime;
	}
	public void setStartTime(Date startTime) {
		this.startTime = startTime;
	}
}

package test1.sort;

import java.text.ParseException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class Test {

	/**
	 * @param args
	 * @throws ParseException