我是多线程的新手,我得到了一个问题,使用

Java中的10个线程以低于约束打印1到100.

>线程t1应打印：

1, 11, 21, 31, … 91

t2应打印：

2, 12, 22, 32, … 92

同样

t10应打印：

10, 20, 30, … 100

>最终的输出应该是

1 2 3 .. 100

我试过了,但它在所有10个线程中抛出以下异常：

java.lang.IllegalMonitorStateException

at java.lang.Object.wait(Native Method)

at java.lang.Object.wait(Object.java:485)

at thread.run(MyThread.java:58)

at java.lang.Thread.run(Unknown Source)

请让我知道如何解决这个问题.

public class MyThread {

/**

* @param args

*/

public static void main(String[] args) {

thread.setSequence();

for(int i = 1; i <= 10; i++) {

Thread t = new Thread(new thread(i));

t.setName(i + "");

t.start();

}

}

}

class thread implements Runnable {

private static HashMap< String, String> sequence = new HashMap();

public static final Object lock = new Object();

public static String turn = "1";

private int startValue = 0;

private AtomicInteger counter = new AtomicInteger(1);

public thread(int startValue){

this.startValue = startValue;

}

@Override

public void run() {

while (!counter.equals(10)){

synchronized (lock) {

if(Thread.currentThread().getName().equals(turn)){

System.out.print(startValue + " ");

startValue += 10;

counter.incrementAndGet();

turn = getNextTurn(turn);

try {

this.wait();

} catch (InterruptedException e) {

e.printStackTrace();

}

}

else{

try {

this.wait();

} catch (InterruptedException e) {

e.printStackTrace();

}

}

this.notifyAll();

}

}

}

public static void setSequence(){

for (int i = 1; i <= 10; i++)

if (i == 10)

sequence.put(i + "", 1 + "");

else

sequence.put(i + "", (i + 1) + "");

}

public static String getNextTurn(String currentTurn){

return sequence.get(currentTurn);

}

}