JAVA8 Lambda初体验

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.Comparator;

 import java.util.List;

 /**

  * JAVA8 Lambda基础用法测试

  *

  * @author yangzhilong

  *

  */

 public class LambdaTest {

     public static void main(String[] args) {

         test1();

         test2();

     }

     private static void test1(){

         //传统写法

         new Thread(new Runnable() {

             @Override

             public void run() {

                 System.out.print("这是传统的输出：");

                 System.out.println("111111111111111");

             }

         }).start();

         //Lambda写法

         new Thread(() -> {

             System.out.print("这是Lambda的输出：");

             System.out.println("22222222222222");

         }).start();;

     }

     private static void test2(){

         List<Integer> list = new ArrayList<>();

         list.add(5);

         list.add(9);

         list.add(3);

         list.add(11);

         //传统写法

         Collections.sort(list, new Comparator<Integer>() {

             @Override

             public int compare(Integer o1, Integer o2) {

                 return o1.compareTo(o2);

             }

         });

         print(list);

         //Lambda写法

         Collections.sort(list, (o1, o2) -> o2.compareTo(o1));

         print(list);

     }

     private static void print(List<Integer> list){

         for (Integer integer : list) {

             System.out.print(integer + " ");

         }

         System.out.println("");

     }

 }

这是传统的输出：111111111111111

这是Lambda的输出：22222222222222

3 5 9 11

11 9 5 3