java开发实战经典（第二版）P452 12-4

12.4 从键盘上输入以下的数据："TOM:89|JERRY:90|TONY:95",数据格式为“姓名：成绩｜姓名：成绩｜姓名：成绩”,对输入的内容按成绩进行排序，并将结果按成绩由高到低排序。

package book;

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

class Person {
 String name;
 int score;
}

class PersonComparator implements Comparator<Person> {
 public int compare(Person per1, Person per2) {
  if (per1.equals(per2)) {
   return 0;
  } else if (per1.score < per2.score) {
   return 1;
  } else {
   return -1;
  }
 }
}

public class JiOu {
 public static void main(String[] args) {
  System.out.println("请输入内容（姓名：成绩｜姓名：成绩｜姓名：成绩）：");
  Scanner scan = new Scanner(System.in);
  String str = scan.next();
  String[] str1 = str.split("\\|");
  List<Person> list = new ArrayList<Person>();
  System.out.print("新的排序为：");
  for (int i = 0; i < str1.length; i++) {
   String[] str2 = str1[i].split("\\:");
   Person per = new Person();
   per.name = str2[0];
   per.score = Integer.parseInt(str2[1]);
   list.add(per);
  }
  Collections.sort(list, new PersonComparator());
  for (int j = 0; j < list.size(); j++) {
   Person per = list.get(j);
   System.out.print(per.name + " " + per.score + " ");
  }
 }
}

运行结果：

请输入内容（姓名：成绩｜姓名：成绩｜姓名：成绩）：
TOM:89|JERRY:90|TONY:95
新的排序为：TONY 95 JERRY 90 TOM 89

原文地址：https://blog.csdn.net/Lakers1989/article/details/78301007