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