lambda表达式

import java.util.*;

/**
 *
 * @author shirley
 * @date 2019/9/4
 */
public class Main {
    public static void main(String[] args) {
        List<Integer> list = Arrays.asList(4,2,7,3,6);
        Collections.sort(list,(o1,o2)->{
            if(o1<o2){
                return -1;
            }
            if(o1>o2){
                return 1;
            }
            return 0;
        });
        System.out.println(list);
    }
}

结果：[2, 3, 4, 6, 7]

来源：https://blog.csdn.net/weixin_44683617/article/details/100540746