mport java.util.concurrent.locks.*;
class Demo{
public static void main(String args[]){
Resource r = new Resource();
Producer pro = new Producer(r);
Consumer con = new Consumer(r);
Thread t1 = new Thread(pro);
Thread t3 = new Thread(pro);
Thread t2 = new Thread(con);
Thread t4 = new Thread(con);
t1.start();
t2.start();
t3.start();
t4.start();
}
}
class Resource{
private String name;
private int count = 1;
private boolean flag = false;
private Lock lock = new ReentrantLock();
private Condition condition_pro = lock.newCondition();
private Condition condition_con = lock.newCondition();
public void set(String name) throws InterruptedException{
lock.lock();
try{
while(flag){
condition_pro.await();
}
this.name = name+"--"+count++;
System.out.println(Thread.currentThread().getName()+"...生产者..."+this.name);
flag = true;
condition_con.signal();
}finally{
lock.unlock();
}
}
public void out() throws InterruptedException{
lock.lock();
try{
while(!flag){
condition_con.await();
}
System.out.println(Thread.currentThread().getName()+"...消费者..........."+this.name);
flag = false;
condition_pro.signal();
}finally{
lock.unlock();
}
}
}
class Producer implements Runnable{
private Resource res;
Producer(Resource res){
this.res = res;
}
public void run(){
while(true){
try{
res.set("+商品+");
}catch(InterruptedException e){
}
}
}
}
class Consumer implements Runnable{
private Resource res;
Consumer(Resource res){
this.res = res;
}
public void run(){
while(true){
try{
res.out();
}catch(InterruptedException e){
}
}
}
}
各位大侠 弱弱的问一句:这是我写的代码,在API中可以看到获取Condition 定义在Lock这个类中,为什么获取Condition 会定义在Lock这个对象上呢??? |