Wait() and notify() porblems.

Question

public class test {
     public static void main(String[] args) {
          new consumer();
          new producer();
class producer extends Thread
     public static int productcnt=0;
     public consumer aconsumer=new consumer();
     producer()
          super("producer : "+ productcnt++);
          start();     
     public void run()
          try
                    sleep(1000);
                    synchronized (aconsumer)
                         System.out.println(this.getName()+" has prepared.");
                         aconsumer.notify();
          catch(InterruptedException e)
               throw new RuntimeException(e);
class consumer extends Thread
     public static int consumercnt=0;
     consumer()
          super("consumer : "+ consumercnt++);
          start();
     public void run()
          try
                    synchronized(this)
                         System.out.println(getName()+ " is waiting.");
                         wait();
                         System.out.println(getName()+ "  get product.");
          catch(InterruptedException e)
               throw new RuntimeException(e);
}We can see the code about producers and consumers above,and the result is:
consumer : 0 is waiting.
consumer : 1 is waiting.
producer : 0 has prepared.
consumer : 1 get product.
---------------------------------------at the end of program ,consumer 0 is waiting however.
consumer 0,started in the main procedure,I can't stop it, who can tell me how tostop it with a notify.
is it real that consumer just can be notified in a procedure which claimed it?

Answer 1

The answer is:
public class Test {
     public static void main(String[] args)
          consumer cs = new consumer(); // ---------
          new producer(cs);
class producer extends Thread
        public static int productcnt=0;
        consumer cs;  // ---------
        public consumer aconsumer=new consumer();
        producer(consumer cs)
           super("producer : "+ productcnt++);
           this.cs = cs;  // ---------
           start();       
       public void run()
             try
                    sleep(1000);
                     System.out.println(this.getName()+" has prepared.");
                    synchronized (cs)  // ---------
                         cs.notify();          // ---------
                   synchronized (aconsumer)
                          aconsumer.notify();
              catch(InterruptedException e)
                       throw new RuntimeException(e);
class consumer extends Thread
        public static int consumercnt=0;
        consumer()
            super("consumer : "+ consumercnt++);
            start();
       public void run()
               try
                       synchronized(this)
                                System.out.println(getName()+ " is waiting.");
                                 wait();
                                 System.out.println(getName()+ "  get product.");
               catch(InterruptedException e)
                       throw new RuntimeException(e);
}Well, I simply tried to not to change your code essentially. If you gonna do something like this
but more complicated try to find other solution.