Java 容器排序

直接上代码：

StudentSort.java

package org.bruce.container.test;

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

/**
 * @author yang3wei
 * 
 * 程序输出为：
 * score = 98, age = 26, name = bb
 * score = 98, age = 25, name = aa
 * score = 97, age = 88, name = cc
 * score = 90, age = 23, name = dd
 * score = 59, age = 28, name = ee
 */
public class StudentSort {
	
	public static void main(String[] args) {
		
		List<Student> stuList = new ArrayList<Student>();
		
		stuList.add(new Student(98, 25, "aa"));
		stuList.add(new Student(98, 26, "bb"));
		stuList.add(new Student(97, 88, "cc"));
		stuList.add(new Student(90, 23, "dd"));
		stuList.add(new Student(59, 28, "ee"));
		
		Collections.sort(stuList, new StudentComparator());
		Collections.reverse(stuList);
		
		for (Student stu : stuList) {
			System.out.println(stu);
		}
	}

}

StudentComparator.java

package org.bruce.container.test;

import java.util.Comparator;

/**
 * @author yang3wei
 * 默认从小到大排序（要想从大到小排，Collections.reverse() 一下就行了）~
 */
public class StudentComparator implements Comparator<Student> {

	@Override
	public int compare(Student stu0, Student stu1) {
		// TODO Auto-generated method stub
		int flag = new Integer(stu0.getScore()).compareTo(stu1.getScore());
		if (flag == 0) {
			return new Integer(stu0.getAge()).compareTo(stu1.getAge());
		} else {
			return flag;
		}
	}

}

Student.java

package org.bruce.container.test;

/**
 * @author yang3wei
 *
 */
public class Student {
	
	private int score;
	private int age;
	private String name;

	/**
	 * @param name
	 * @param age
	 */
	public Student(int score, int age, String name) {
		this.score = score;
		this.age = age;
		this.name = name;
	}
	
	@Override
	public String toString() {
		StringBuffer sb = new StringBuffer();
		sb.append("score = ").append(score).append(", age = ");
		sb.append(age).append(", name = ").append(name);
		return sb.toString();
	}
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
	public int getScore() {
		return score;
	}
	public void setScore(int score) {
		this.score = score;
	}
}