线程高级篇（一）：多线程任务框架
锁的概念： package com.bjsxt.height.lock020; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock; public class UseReentrantLock { private Lock lock = new ReentrantLock(); public void method1(){ try { lock.lock(); System.out.println("当前线程:" + Thread.currentThread().getName() + "进入method1.."); Thread.sleep(1000); System.out.println("当前线程:" + Thread.currentThread().getName() + "退出method1.."); Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } finally { lock.unlock(); } } public void method2(){ try { lock.lock(); System.out.println("当前线程:" + Thread.currentThread().getName() + "进入method2.."); Thread.sleep(2000); System.out.println("当前线程:" + Thread.currentThread().getName() + "退出method2.."); Thread.sleep(1000); } catch (InterruptedException e) { e.printStackTrace(); } finally { lock.unlock(); } } public static void main(String[] args) { final UseReentrantLock ur = new UseReentrantLock(); Thread t1 = new Thread(new Runnable() { @Override public void run() { ur.method1(); } }, "t1"); t1.start(); try { Thread.sleep(10); } catch (InterruptedException e) { e.printStackTrace(); } Thread t2 = new Thread(new Runnable() { @Override public void run() { ur.method1(); } }, "t2"); t2.start(); //System.out.println(ur.lock.getQueueLength()); } } package com.bjsxt.height.lock020; import java.util.concurrent.locks.Condition; import java.util.concurrent.locks.Lock; import java.util.concurrent.locks.ReentrantLock; public class UseCondition { private Lock lock = new ReentrantLock(); private Condition condition = lock.newCondition(); public void method1(){ try { lock.lock(); System.out.println("当前线程：" + Thread.currentThread().getName() + "进入等待状态.."); Thread.sleep(3000); System.out.println("当前线程：" + Thread.currentThread().getName() + "释放锁.."); condition.await(); // Object wait System.out.println("当前线程：" + Thread.currentThread().getName() +"继续执行..."); } catch (Exception e) { e.printStackTrace(); } finally { lock.unlock(); } } public void method2(){ try { lock.lock(); System.out.println("当前线程：" + Thread.currentThread().getName() + "进入.."); Thread.sleep(3000); System.out.println("当前线程：" + Thread.currentThread().getName() + "发出唤醒.."); condition.signal(); //Object notify } catch (Exception e) { e.printStackTrace(); } finally { lock.unlock(); } } public static void main(String[] args) { final UseCondition uc = new UseCondition(); Thread t1 = new Thread(new Runnable() { @Override public void run() { uc.method1(); } }, "t1"); Thread t2 = new Thread(new Runnable() { @Override public void run() { uc.method2(); } }, "t2"); t1.start(); t2.start(); } }
