java-同步访问一个数组Integer[10]，生产者不断地往数组放入整数1000，数组满时等待；消费者不断地将数组里面的数置零，数组空时等待

public class PC {/** * 题目：生产者-消费者。 * 同步访问一个数组Integer[10]，生产者不断地往数组放入整数1000，数组满时等待；消费者不断地将数组里面的数置零，数组空时等待。 */private static final Integer[] val=new Integer[10];private static int size=0;private static final int MAX_SIZE=10;public static void main(String[] args)  {PC pc=new PC();new Thread(pc.new P()).start();new Thread(pc.new C()).start();}public synchronized void consume(){while(size<=0){try {System.out.println(size+"- consume wait");wait();} catch (InterruptedException e) {e.printStackTrace();}}val[--size]=0;notifyAll();System.out.println("successful consume and now size="+size);}public  synchronized void produce(int value){ while(size==MAX_SIZE){try {System.out.println(size+"- produce wait");wait();} catch (InterruptedException e) {e.printStackTrace();}}val[size++]=value;notifyAll();System.out.println("successful produce and now size="+size);}class P implements Runnable{public void run(){while(true)produce(1000);}}class C implements Runnable{public void run(){while(true)consume();}}}