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("");
     }
 }

输出结果：

这是传统的输出：111111111111111
这是Lambda的输出：22222222222222
3 5 9 11
11 9 5 3