Java中使用synchronized和Lock对象获取对象锁 - 编程入门网
| ck对象获取对象锁(2)
时间:2011-01-25 zhangjunhd
结果： Thread-0:not synchronized in f() Thread-0:synchronized in f() main:not synchronized in h() Thread-1:not synchronized in g() Thread-0:synchronized in f() Thread-0:synchronized in f() Thread-0:synchronized in f() Thread-0:synchronized in f() Thread-1:synchronized in g() Thread-1:synchronized in g() Thread-1:synchronized in g() Thread-1:synchronized in g() Thread-1:synchronized in g() main:synchronized in h() main:synchronized in h() main:synchronized in h() main:synchronized in h() main:synchronized in h() Java中使用synchronized和Lock对象获取对象锁(3)时间:2011-01-25 zhangjunhd2.2 同步到多个对象锁 Resource1.java演示了三个线程（包括main线程）试图进入某个类的三个不同的方法的同步块中，这些同步块处在不同的方法中，并且是同步到三个不同的对象（synchronized (this)，synchronized (syncObject1)，synchronized (syncObject2)），所以对它们的方法中的临界资源访问是独立的。 Resource2.java
package com.zj.lock;import java.util.concurrent.TimeUnit; public class Resource2 { private Object syncObject1 = new Object(); private Object syncObject2 = new Object(); public void f() { // other operations should not be locked... System.out.println(Thread.currentThread().getName() + ":not synchronized in f()"); synchronized (this) { for (int i = 0; i < 5; i++) { System.out.println(Thread.currentThread().getName() + ":synchronized in f()"); try { TimeUnit.SECONDS.sleep(3); } catch (InterruptedException e) { e.printStackTrace(); } } } } public void g() { // other operations should not be locked... System.out.println(Thread.currentThread().getName() + ":not synchronized in g()"); synchronized (syncObject1) { for (int i = 0; i < 5; i++) { System.out.println(Thread.currentThread().getName() + ":synchronized in g()"); try { TimeUnit.SECONDS.sleep(3); } catch (InterruptedException e) { e.printStackTrace(); } } } } public void h() { // other operations should not be locked... System.out.println(Thread.currentThread().getName() + ":not synchronized in h()"); synchronized (syncObject2) { for (int i = 0; i < 5; i++) { System.out.println(Thread.currentThread().getName() + ":synchronized in h()"); try { TimeUnit.SECONDS.sleep(3); } catch (InterruptedException e) { e.printStackTrace(); } } } } public static void main(String[] args) { final Resource2 rs = new Resource2(); new Thread() { public void run() { |
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