threadtest.java

孙鑫JAVA从入门到精通配套练习程序。所有程序都实际运行过

class ThreadTest
{
	public static void main(String[] args)
	{
		MyThread mt = new MyThread();
		//mt.setDaemon(true);
		//mt.start();
		
		new Thread(mt).start();
		new Thread(mt).start();
		new Thread(mt).start();
		new Thread(mt).start();
		
		
		//int index = 0;
		/*
		while(true)
		{
			/*
			if (index++ == 200)
			{
				break;
			}
			
			System.out.println(Thread.currentThread().getName());
		}
		*/
	}
}

class MyThread implements Runnable//extends Thread
{
	private int index = 100;
	Object obj = new Object();
	public void run()
	{                                                                      
		while(true)                                                          
		{    
			/*
			synchronized(obj)
			{   
				if (index > 0)   
				{    
					try
					{
						Thread.sleep(10);
					}              
					catch(InterruptedException e)
					{
						System.out.println(e);
					}                                        
					System.out.println(Thread.currentThread().getName()+" " + index);
					index--;
				}
				
			//yield();   
			}    
			*/   
			sell();                                               
		}                                                                    
	}	   
	public synchronized void sell()
	{
		if (index > 0)   
		{                                                                  
			try                                                              
			{                                                                
				Thread.sleep(10);                                              
			}                                                                
			catch(InterruptedException e)                                    
			{                                                                
				System.out.println(e);                                         
			}                                                                
			System.out.println(Thread.currentThread().getName()+" " + index);
			index--;  
		}                                                                                                                         
	}                                                                  
}