Algorithm_project/Lambda_module/src/Lambda_package/Lambda_demo1.java

package Lambda_package;

import java.util.Arrays;
import java.util.Comparator;

public class Lambda_demo1 {
    public static void main(String[] args) {
        //初识lambda表达式
        Integer[] arr = {2, 3, 1, 5, 6, 7, 8, 4, 9};

//        Arrays.sort(arr, new Comparator<Integer>() {
//            @Override
//            public int compare(Integer o1, Integer o2) {
//                return o1-o2;
//            }
//        });

        Arrays.sort(arr, (Integer o1, Integer o2) -> {
                    return o1 - o2;
                }
        );

        System.out.println(Arrays.toString(arr));
    }
}