Java集合逆序方式

javaCopy code
import java.util.Collections;
import java.util.List;
import java.util.Arrays;
public class Main {
    public static void main(String[] args) {
        List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);
        // 使用Collections.reverse()方法逆序集合
        Collections.reverse(numbers);
        System.out.println("集合逆序后：");
        System.out.println(numbers);
    }
}

javaCopy code
import java.util.List;
import java.util.ListIterator;
import java.util.Arrays;
public class Main {
    public static void main(String[] args) {
        List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);
        // 使用ListIterator接口逆序遍历集合
        ListIterator<Integer> iterator = numbers.listIterator(numbers.size());
        while (iterator.hasPrevious()) {
            System.out.println(iterator.previous());
        }
    }
}

javaCopy code
import java.util.List;
import java.util.stream.Collectors;
import java.util.Arrays;
public class Main {
    public static void main(String[] args) {
        List<Integer> numbers = Arrays.asList(1, 2, 3, 4, 5);
        // 使用Java 8的Stream API逆序集合
        List<Integer> reversed = numbers.stream()
                                        .sorted(Collections.reverseOrder())
                                        .collect(Collectors.toList());
        System.out.println("集合逆序后：");
        System.out.println(reversed);
    }
}

javaCopy code
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
class Article {
    private String title;
    private String content;
    private String publishTime;
    public Article(String title, String content, String publishTime) {
        this.title = title;
        this.content = content;
        this.publishTime = publishTime;
    }
    public String getTitle() {
        return title;
    }
    public String getContent() {
        return content;
    }
    public String getPublishTime() {
        return publishTime;
    }
    @Override
    public String toString() {
        return "Article{" +
                "title='" + title + '\'' +
                ", content='" + content + '\'' +
                ", publishTime='" + publishTime + '\'' +
                '}';
    }
}
public class Main {
    public static void main(String[] args) {
        // 模拟文章列表
        List<Article> articleList = new ArrayList<>();
        articleList.add(new Article("文章1", "内容1", "2024-02-28 10:00:00"));
        articleList.add(new Article("文章2", "内容2", "2024-02-27 12:00:00"));
        articleList.add(new Article("文章3", "内容3", "2024-03-01 08:00:00"));
        // 按发布时间逆序排序文章列表
        Collections.sort(articleList, (a1, a2) -> a2.getPublishTime().compareTo(a1.getPublishTime()));
        // 输出逆序排列后的文章列表
        System.out.println("按发布时间逆序排列后的文章列表：");
        for (Article article : articleList) {
            System.out.println(article);
        }
    }
}