java api sort的使用

package com;

import java.util.Arrays;
import java.util.Comparator;
import java.util.Scanner;

public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Student s[] = new Student[5];
		
		Scanner scanner = new Scanner(System.in);
		for (int i = 0; i < s.length; i++) {
			System.out.println("请输入学生姓名：");
			String name = scanner.next();
			System.out.println("请输入学生分数：");
			int score = scanner.nextInt();
			Student student = new Student(name, score);
			s[i] = student;
		}
		
		
		printfStudents(s);
		Arrays.sort(s, new Comparator<Student>() {

			@Override
			public int compare(Student arg0, Student arg1) {
				// TODO Auto-generated method stub
				return arg1.getScore()-arg0.getScore();
			}
		
		});
		printfStudents(s);
		
		
		int scores[] = {90, 80, 100, 70, 60};
		Arrays.sort(scores);
		for (int i = 0; i < scores.length; i++) {
			System.out.print(scores[i] + " ");
		}
		System.out.println();
	}
	
	public static void printfStudents(Student s[]){
		for (int i = 0; i < s.length; i++) {
			System.out.print(s[i] + " ");
		}
		System.out.println();
	}

}

package com;

public class Student {
	private String name;
	private int score;

	public Student(String name, int score) {
		super();
		this.name = name;
		this.score = score;
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getScore() {
		return score;
	}

	public void setScore(int score) {
		this.score = score;
	}

	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return name + ":" + score;
	}
}