好的，这是密码。它基本上有三个类。其中一个是增加一个值，另一个是减少一个无休止的循环。但当数值超过或低于某一特定极限时，它必须停止。但由于这两个函数都有notifyall，所以它也会唤醒其他函数，因此即使它处于极限，它也会继续运行。我怎样才能解决这个问题？提前谢谢。
第一类（增加和使用线程）：

public class Producer extends Thread{

private Counter counter;

public Producer(Counter counter) {
    // TODO Auto-generated constructor stub
    this.counter=counter;
}

@Override
public void run() {
    // TODO Auto-generated method stub
    //super.run();

    for(;;) {
        try {
            counter.increase();
            sleep(100);
        }
        catch (InterruptedException e) {
            // TODO: handle exception
            System.out.println("Producer:"+e.getMessage());
        }
    }

}

第二类（随runnable递减）：

public class Consumer implements Runnable{

private Counter counter;

public Consumer(Counter counter) {
    // TODO Auto-generated constructor stub
    this.counter=counter;
}

@Override
public void run() {
    // TODO Auto-generated method stub
    //super.run();

    for(;;) {
        try {
            counter.decrease();

            Thread.currentThread().sleep(100);
        }
        catch (InterruptedException e) {
            // TODO: handle exception
            System.out.println("Consumer:"+e.getMessage());
        }
    }

}

}
包含函数的第三类：

import java.util.Random;

public class Counter {

private int counter;
private Random ran;

public Counter() {
    //super();
    counter=0;
    ran= new Random();
}

public synchronized void increase() {
    int number=ran.nextInt(5);

    if(counter+number>=100 ) {

        System.out.println("Producer is stopping, value is: "+counter);
        System.out.println("The generated number is: "+number);
        try {
            wait();
        }
        catch (InterruptedException e) {
            // TODO: handle exception
            System.out.println("error in increasing mehtod"+e.getMessage());
        }

    }

    counter = counter+number;
    notifyAll();
    System.out.println("Prdoucer increase: "+counter);
}

public synchronized void decrease() {
    int number= ran.nextInt(5);
    if(counter-number<0) {
        System.out.println("Consumer is stopping, value is: "+counter);
        System.out.println("The generated number is: "+number);
        try {
            wait();
        }
        catch (InterruptedException e) {
            // TODO: handle exception
            System.out.println("error in decreasing mehtod"+e.getMessage());
        }
    }
    counter = counter-number;
    notifyAll();
    System.out.println("Consumer decrease: "+counter);

 }

}