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1
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}]
Java 解法, 执行用时: 26ms, 内存消耗: 10852KB, 提交时间: 2022-02-08
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;
}
@Override
public String toString() {
return "Customer{" +
"name='" + name + '\'' +
", consumption=" + consumption +
'}';
}
//write your code here......
@Override
public int compareTo(Customer other){
return other.consumption-this.consumption;
}
}
Java 解法, 执行用时: 28ms, 内存消耗: 10720KB, 提交时间: 2021-11-24
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;
}
@Override
public String toString() {
return "Customer{" +
"name='" + name + '\'' +
", consumption=" + consumption +
'}';
}
//write your code here......
@Override
public int compareTo(Customer o) {
return o.consumption-this.consumption;
}
}
Java 解法, 执行用时: 29ms, 内存消耗: 10584KB, 提交时间: 2021-11-25
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;
}
@Override
public String toString() {
return "Customer{" +
"name='" + name + '\'' +
", consumption=" + consumption +
'}';
}
//write your code here......
@Override
public int compareTo(Customer c){
return c.consumption-consumption;
}
}
Java 解法, 执行用时: 29ms, 内存消耗: 10624KB, 提交时间: 2022-02-10
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;
}
@Override
public String toString() {
return "Customer{" +
"name='" + name + '\'' +
", consumption=" + consumption +
'}';
}
//write your code here......
@Override
public int compareTo(Customer o) {
return o.consumption - this.consumption;
}
}
Java 解法, 执行用时: 29ms, 内存消耗: 10640KB, 提交时间: 2021-11-24
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);//排序函数
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;
}
@Override
public String toString() {
return "Customer{" +
"name='" + name + '\'' +
", consumption=" + consumption +
'}';
}
//write your code here......
public int compareTo(Customer other){//重载比较方法
return other.consumption-this.consumption;//大的在前小的在后
}
}