java ReentrantLock Condition

Question

目的是想用ReentrantLock  Condition 按数组  顺序输出;但好像一直锁等待,不明白为什么,麻烦大神解惑,感谢

private static ReentrantLock lock = new ReentrantLock();
	private static Condition c = lock.newCondition();
	private static Condition c2 = lock.newCondition();
	volatile static int m = 0;
	public static void main(String[] args) throws Exception {
		int[] arr = {1,2,3,4,5,6,7,8,9,0};
		
		for(int i = 0;i<arr.length;i++) {
			final int  n = arr[i];
			new Callable<String>() {
				
				@Override
				public String call() throws Exception {
					String rt = "";
					try {
						lock.lock();
						if(n != m) {
							System.out.println(m+"  wait");
							c.await();
							rt+="--wait--";
						}
						System.out.println(Thread.currentThread().getName()+"-------run-----"+n);
						
						c.signalAll();
						rt+="--ok";
						m++;
						return rt;
					} catch (InterruptedException e) {
						e.printStackTrace();
					}finally {
						lock.unlock();
					}
					return null;
				}
			}.call();
		}
	}

Answer 1

建议写一些调试的打印语句，跟踪代码运行状态。