Java对List进行排序的方法总结

import java.util.Collections;
import java.util.List;

public class ListSortingExample {
    public static void main(String[] args) {
        List<Integer> numbers = List.of(5, 2, 7, 1, 3);
        
        // 使用Collections.sort方法对List进行排序
        Collections.sort(numbers);
        
        System.out.println("排序后的列表：" + numbers);
    }
}

import java.util.Collections;
import java.util.List;

public class Student implements Comparable<Student> {
    private int id;
    private String name;

    // 构造函数、getter和setter省略
    
    @Override
    public int compareTo(Student other) {
        return Integer.compare(this.id, other.id);
    }

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

    public static void main(String[] args) {
        List<Student> students = List.of(
                new Student(3, "Alice"),
                new Student(1, "Bob"),
                new Student(2, "Charlie")
        );

        // 使用Collections.sort方法对包含Student对象的List进行排序
        Collections.sort(students);

        System.out.println("按照id排序后的学生列表：" + students);
    }
}

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

public class StringSortingExample {
    public static void main(String[] args) {
        List<String> words = List.of("apple", "banana", "pear", "grapefruit");
        
        // 使用Comparator进行降序排序
        Comparator<String> byLength = (s1, s2) -> Integer.compare(s2.length(), s1.length());
        Collections.sort(words, byLength);
        
        System.out.println("按照字符串长度降序排序后的列表：" + words);
    }
}

import java.util.List;
import java.util.stream.Collectors;

public class StreamSortingExample {
    public static void main(String[] args) {
        List<Integer> numbers = List.of(5, 2, 7, 1, 3);
        
        // 使用Stream API进行排序
        List<Integer> sortedNumbers = numbers.stream()
                                             .sorted()
                                             .collect(Collectors.toList());
        
        System.out.println("排序后的列表：" + sortedNumbers);
    }
}