题目
- JAVA44 集合排序
- 描述
- 输入描述：
- 输出描述：
- 示例:
- 分析：
- 代码：
JAVA44 集合排序
描述
有三个客户对象，将三个客户对象存入集合中，并将其按照消费总额从高到低排序
输入描述：
三个整数，分别代表三个客户的消费值
输出描述：
根据消费额从高到低排序后的集合（输出部分预设代码已经给出，为保证输出格式请不要随意更改）
示例:
输入：234 456 789输出： [Customer{name='小红', consumption=789}, Customer{name='小军', consumption=456}, Customer{name='小明', consumption=234}]
分析：
1.重写内置比较器。
2.使用 Collections.sort()方法。
代码：
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;public class Main {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);Customer customer1 = new Customer("小明",scanner.nextInt());Customer customer2 = new Customer("小军",scanner.nextInt());Customer customer3 = new Customer("小红",scanner.nextInt());List<Customer> customers = new ArrayList<>();customers.add(customer1);customers.add(customer2);customers.add(customer3);//write your code here......Collections.sort(customers);System.out.println(customers);}
}class Customer implements Comparable<Customer>{private String name;private int consumption;public Customer(String name, int consumption) {this.name = name;this.consumption = consumption;}@Overridepublic String toString() {return "Customer{" +"name='" + name + '\'' +", consumption=" + consumption +'}';}//write your code here......@Overridepublic int compareTo(Customer o) {return o.consumption-this.consumption;}}
)
