直接上代码,后面我也有一个问题,关于对象的notifyAll或者notify或者single或者singleAll,唤醒线程是顺序唤醒吗,我这里都是顺序输出了
关于公平与非公平锁的问题?唤醒是公平的???又没有大佬帮助解答!
1 import java.util.concurrent.LinkedBlockingQueue;
2 import java.util.concurrent.ThreadPoolExecutor;
3 import java.util.concurrent.TimeUnit;
4 import java.util.concurrent.locks.Condition;
5 import java.util.concurrent.locks.Lock;
6 import java.util.concurrent.locks.ReentrantLock;
7
8 /**
9 * 使用lock对象,使多个线程循环输出0-99-0-99
10 */
11 public class AandBforTOthreadLock {
12 private static Lock lock=new ReentrantLock();
13 private static Condition single=lock.newCondition();
14 static class A implements Runnable{
15 private int i=0;
16 public A(int i){
17 this.i=i;
18 }
19 @Override
20 public void run() {
21 try {
22 lock.lock();
23 while (true){
24 System.out.println(i);
25 single.await();
26 single.signal();
27 }
28 }catch (Exception e){
29 e.printStackTrace();
30 }finally {
31 lock.unlock();
32 }
33 }
34 }
35 static class B implements Runnable{
36 @Override
37 public void run() {
38 try {
39 lock.lock();
40 while (true){
41 System.out.println("99");
42 single.signalAll();
43 single.await();
44 }
45 }catch (Exception e){
46 e.printStackTrace();
47 }finally {
48 lock.unlock();
49 }
50 }
51 }
52
53 public static void main(String[] args) throws InterruptedException {
54 ThreadPoolExecutor threadPoolExecutor=new ThreadPoolExecutor(100,100,0L, TimeUnit.MILLISECONDS,
55 new LinkedBlockingQueue<Runnable>());
56 for (int i=0;i<99;i++){
57 threadPoolExecutor.execute(new A(i));
58 Thread.sleep(3l);
59 }
60 Thread.sleep(10000l);
61 threadPoolExecutor.execute(new B());
62 }
63
64 }
输出:
……

