package Runnable; 
 
import java.util.concurrent.locks.Lock; 
import java.util.concurrent.locks.ReentrantLock; 
 
/* 
 * 同步 
 * 這里有兩種方式加鎖 
 * 分別是 
 * 1.synchronized 
 * 2.lock()和unlock() 
 */ 
public class MyRunnable implements Runnable { 
  private int tickets = 100; 
 
  // 定義鎖 
  private Lock lock = new ReentrantLock(); 
 
  public void run() { 
    while (true) { 
      // 加鎖 
      lock.lock(); 
      if (tickets > 0) { 
        try { 
          Thread.sleep(100); 
        } catch (InterruptedException e) { 
          // TODO Auto-generated catch block 
          e.printStackTrace(); 
        } 
        System.out.println(Thread.currentThread().getName() + "售出了第" + (tickets--) + "張票"); 
      } 
      lock.unlock(); 
    } 
  } 
}

package Runnable; 
 
 
/* 
 * 同步 
 * 這里有兩種方式加鎖 
 * 分別是 
 * 1.synchronized 
 * 2.lock()和unlock() 
 */ 
public class MyRunnable implements Runnable { 
  private int tickets = 100; 
 
  public void run() { 
    while (true) { 
      synchronized (this) { 
        if (tickets > 0) { 
          try { 
            Thread.sleep(100); 
          } catch (InterruptedException e) { 
            // TODO Auto-generated catch block 
            e.printStackTrace(); 
          } 
          System.out.println(Thread.currentThread().getName() + "售出了第" + (tickets--) + "張票"); 
        } 
      } 
    } 
  } 
}

package Runnable; 
 
public class RunnableDemo { 
  public static void main(String[] args) { 
    MyRunnable myRunnable = new MyRunnable(); 
    Thread t1 = new Thread(myRunnable, "窗口一"); 
    Thread t2 = new Thread(myRunnable, "窗口二"); 
    Thread t3 = new Thread(myRunnable, "窗口三"); 
    t1.start(); 
    t2.start(); 
    t3.start(); 
  } 
}