Java中使用synchronized和Lock对象获取对象锁 - 编程入门网
rs.f(); } }.start(); new Thread() { public void run() { rs.g(); } }.start(); rs.h(); }}
Java中使用synchronized和Lock对象获取对象锁(4)时间:2011-01-25 zhangjunhd结果： Thread-0:not synchronized in f() Thread-0:synchronized in f() main:not synchronized in h() main:synchronized in h() Thread-1:not synchronized in g() Thread-1:synchronized in g() Thread-0:synchronized in f() main:synchronized in h() Thread-1:synchronized in g() Thread-0:synchronized in f() main:synchronized in h() Thread-1:synchronized in g() Thread-0:synchronized in f() main:synchronized in h() Thread-1:synchronized in g() Thread-0:synchronized in f() main:synchronized in h() Thread-1:synchronized in g() Java中使用synchronized和Lock对象获取对象锁(5)时间:2011-01-25 zhangjunhd3.Lock对象锁 除了使用synchronized外，还可以使用Lock对象来创建临界区。Resource3.java的演示效果同Resource1.java；Resource4.java的演示效果同Resource2.java。 Resource3.java
package com.zj.lock;import java.util.concurrent.TimeUnit;import java.util.concurrent.locks.Lock;import java.util.concurrent.locks.ReentrantLock; public class Resource3 { private Lock lock = new ReentrantLock(); public void f() { // other operations should not be locked... System.out.println(Thread.currentThread().getName() + ":not synchronized in f()"); lock.lock(); try { 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(); } } } finally { lock.unlock(); } } public void g() { // other operations should not be locked... System.out.println(Thread.currentThread().getName() + ":not synchronized in g()"); lock.lock(); try { 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(); } } } finally { lock.unlock(); } } public void h() { // other operations should not be locked... System.out.println(Thread.currentThread().getName() + ":not synchronized in h()"); lock.lock(); try { 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(); |
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