标签：dem ack app res ring new t rest cep catch
学C的时间粗劣写过些wait和notify的代码，java里接触的时候并没有花什么时间学习，本质上来说并没有区别，这两个方法都要和锁配合使用，java里常见和synchronized关键词配合使用,使用上十分简单。需要注意的地方是wait会释放锁，而notify并不释放锁，仍然需要代码去释放锁，其他进程即使收到notify的信号，如果没有获得锁是无法唤醒的。public static class Thread1 extends Thread{
@Override
public void run() {
synchronized (lock){
System.out.println("this is "+Thread.currentThread().getId());
try {
//模拟工作1
Thread.sleep(1000);
System.out.println(Thread.currentThread().getId()+" begin to wait");
lock.wait();
System.out.println(Thread.currentThread().getId()+" get lock and restart");
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getId()+" work complete");
}
}
}
public static class Thread2 extends Thread{
@Override
public void run() {
synchronized (lock){
System.out.println("this is "+Thread.currentThread().getId());
try {
//模拟工作2
Thread.sleep(2000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getId()+" egin to notify");
lock.notify();
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getId()+" work complete");
}
}
}
public static void main(String[] args) throws InterruptedException {
new Thread1().start();
new Thread2().start();
}}
运行结果
this is 18
18 begin to wait
this is 19
19 egin to notify
19 work complete
18 get lock and restart
18 work complete
标签：dem ack app res ring new t rest cep catch
原文地址：http://blog.51cto.com/mawielbue/2139254
