线程lock condition使用

[is668com]

下面是具体例子，一直抛错，搞不懂应该怎么用了；求修改求思想
package com.sixth.exam;

import java.util.concurrent.locks.*;

public class T3{
public static void main(String[] args)
{

ReentrantLock lock=new ReentrantLock();
PrintThread pt=new PrintThread(lock);
Thread t=new Thread(pt);
t.start();
}
}
class PrintThread implements Runnable
{

ReentrantLock lock;
Condition condition;
PrintThread1 pt1;
Thread t1;
public PrintThread(ReentrantLock lock)
{
this.lock=lock;
condition=lock.newCondition();
pt1=new PrintThread1(lock);
t1=new Thread(pt1);
}
public void run()
{
t1.start();
for(int i=3;i>=0;i--)
{
System.out.println(i+"....");
if(i==1)
{
System.out.println("起床啦");
condition.signalAll();
}
}

}
}
class PrintThread1 implements Runnable
{
ReentrantLock lock;
Condition condition;
public PrintThread1(ReentrantLock lock)
{
this.lock=lock;
condition=lock.newCondition();
}
public void run()
{
try {
lock.newCondition().await();
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("复活了~");
}
}

[Kanepan]

import java.util.concurrent.locks.*;

public class T3 {
	public static void main(String[] args) {

		ReentrantLock lock = new ReentrantLock();
		PrintThread pt = new PrintThread(lock);
		Thread t = new Thread(pt);
		t.start();
	}
}

class PrintThread implements Runnable {

	ReentrantLock lock;
	Condition condition;
	PrintThread1 pt1;
	Thread t1;

	public PrintThread(ReentrantLock lock) {
		this.lock = lock;
		condition = lock.newCondition();
		pt1 = new PrintThread1(lock, condition);
		t1 = new Thread(pt1);
	}

	public void run() {
		t1.start();
		for (int i = 3; i >= 0; i--) {
			try {
				Thread.sleep(100);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			System.out.println(i + "....");
			if (i == 1) {
				System.out.println("起床啦");
				lock.lock();
				try {
					condition.signal();
				} finally {
					lock.unlock();
				}
			}
		}

	}
}

class PrintThread1 implements Runnable {
	ReentrantLock lock;
	Condition condition;

	public PrintThread1(ReentrantLock lock, Condition condition) {
		this.lock = lock;
		this.condition = condition;
	}

	public void run() {
		lock.lock();
		try {
			condition.await();
		} catch (InterruptedException e) {
			e.printStackTrace();
		} finally {
			lock.unlock();
		}
		System.out.println("复活了~");
	}
}

[Kanepan]

你就把lock.lock()当做synchronized(object);
但是记得必须要 lock.unlock();
不是十分有把握的情况下，尽量用synchronized，简单，易懂。性能上的差距只是代码级的。

[is668com]

[Quote=引用 1 楼 的回复:]

Java code

import java.util.concurrent.locks.*;

public class T3 {
public static void main(String[] args) {

ReentrantLock lock = new ReentrantLock();
PrintThread pt = new PrintT……
[/Quote]
怎么设置加锁的位置？
我在不同的代码块加锁Console输出的不同