题解 | #集合排序#

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Scanner;
import java.util.Comparator;
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,new Comparator<Customer>(){
        //     @Override
        //     public int compare(Customer o1,Customer o2){
        //         return o2.getConsumption() - o1.getConsumption(); 
        //     }
        // });
        //lambda简化
        Collections.sort(customers,(Customer o1,Customer o2) ->  o2.getConsumption() - o1.getConsumption());

        
        System.out.println(customers);

    }
}

class Customer{
    private String name;
    private int consumption;

    public Customer(String name, int consumption) {
        this.name = name;
        this.consumption = consumption;
    }

    public int getConsumption(){
        return consumption;
    }

    @Override
    public String toString() {
        return "Customer{" +
                "name='" + name + '\'' +
                ", consumption=" + consumption +
                '}';
    }

    //write your code here......
   
    

}