线程1—Runnable

随便选择两个城市作为预选旅游目标。实现两个独立的线程分别显示10次城市名，每次显示后休眠一段随机时间(1000ms以内)，哪个先显示完毕，就决定去哪个城市。分别用Runnable接口和Thread类实现。

 import java.util.*;

 public class Ly_Runnable implements Runnable {
     public void run() {
         test();
     }

     public void test() {
         Random r = new Random();
         try {
             for (int i = 1; i <= 10; i++) {
                 int a = r.nextInt(1000);
                 Thread.sleep(a);
                 System.out.print(a + "秒后去");
                 System.out.println(Thread.currentThread().getName());
             }
         } catch (Exception e) {
             e.printStackTrace();
         }
     }

     public static void main(String[] args) {
         Thread tr1 = new Thread(new Ly_Runnable());
         tr1.setName("淄博");
         tr1.start();

         Thread tr2 = new Thread(new Ly_Runnable());
         tr2.setName("青岛");
         tr2.start();
     }
 }

运行：