在Java的Condition接口【唤醒全部线程】

在Java的Condition接口中，存在的几个方法跟Synchronized中的wait(),waitall(),wait(time ^)，这个几个方法一一对应起来，但是在Lock.newCondition()返回中可以指定指定的线程释放和等待资源。

请看【唤醒全部线程】实例：

 package TestThread.TestCondition;

 import java.util.concurrent.locks.ReentrantLock;
 import java.util.concurrent.locks.*;

 public class TestCondition {
     public static void main(String[] args) {
         ReentrantLock lock = new ReentrantLock();
         Condition condition = lock.newCondition();
         Test1 th1 = new Test1(lock, condition, "线程1");
         Test1 th2 = new Test1(lock, condition, "线程2");
         Test1 th3 = new Test1(lock, condition, "线程3");
         Test2 t2 = new Test2(condition, lock, "我是唤醒线程");
         th1.start();
         th2.start();
         th3.start();
         try {
             Thread.sleep();
             t2.start();
         } catch (InterruptedException e) {
             e.printStackTrace();
         }
     }
 }

 class Test1 extends Thread {
     private ReentrantLock lock;
     private Condition condition1;

     public Test1(ReentrantLock lock, Condition condition1, String name) {
         super(name);
         this.lock = lock;
         this.condition1 = condition1;
     }

     @Override
     public void run() {
         for (int i = ; i < ; i++) {
             try {
                 lock.lock();// 加锁
                 if (i == ) {
                     try {
                         condition1.await();
                         System.out.println(Thread.currentThread().getName() + "当前线程获取到的值为：++++++++++++" + i);
                     } catch (InterruptedException e) {
                         System.out.println(Thread.currentThread().getName() + ":线程被中断了！");
                     }
                 } else {
                     System.out.println(Thread.currentThread().getName() + ":当前线程获取到的值为===》" + i);
                 }
             } catch (Exception e) {
                 System.out.println("系统发生异常！");
             } finally {
                 lock.unlock();// 解锁
             }
         }
     }
 }

 class Test2 extends Thread {
     private Condition condition;
     public ReentrantLock lock;

     /**
      * @param condition协作对象
      * @param lock锁对象
      * @param name线程名称
      */
     public Test2(Condition condition, ReentrantLock lock, String name) {
         super(name);
         this.condition = condition;
         this.lock = lock;
     }

     @Override
     public void run() {
         try {
             lock.lock();// 加锁
             condition.signalAll();;// 唤醒启动全部线程
             System.out.println(Thread.currentThread().getName() + ":已经唤醒了一个线程！");
         } catch (Exception e) {
             System.out.println(Thread.currentThread().getName() + ":线程挂了！");
         } finally {
             lock.unlock();// 解锁
         }
     }
 }

测试结果：