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多线程！！！

daijope 2011-08-07 03:07:14

有三个线程ID分别是A、B、C,请有多线编程实现，在屏幕上循环打印10次ABCABC…

个人觉得：用到了sleep()不是好方法，打印出来了不一定就是正确的因为多线程的调度我们不可精细控制。ABC是线程的name,打印的时候用到Thread.getName();

要怎么写呢？？

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afunx 2011-08-08

顶11楼！

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回炉 2011-08-07

这个貌似会a! 将三个线程都加上同步锁就OK 了！

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meran 2011-08-07

哈差不多 ~貌似我用BlockingQueue写的它那没有哦

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zqfddqr 2011-08-07

这么多回的我就不写了哈哈哈哈哈
推荐一个强的 http://hi.baidu.com/dapplehou/blog/item/14e62834ebe1bc235ab5f504.html

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meran 2011-08-07



package Csdn;



import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import java.util.concurrent.LinkedBlockingQueue;

import java.util.concurrent.TimeUnit;



 class AChar {

	

	public enum Status{ A,B,C};

	private Status status=Status.A;

	public void B(){status=Status.B;};

	public void C(){status=Status.C;};

	public Status getStatus(){return status;}

}



class CharQueue extends LinkedBlockingQueue<AChar>{

	

}



class  StatusA implements Runnable{

	private CharQueue queueA;

	private int count=10;

	StatusA(CharQueue queueA){

		this.queueA=queueA;

	}



	@Override

	public void run() {

	   while(count>0){

		   

		    try {

			   queueA.add(new AChar());

			   count--;

			TimeUnit.MILLISECONDS.sleep(1000);

			//此处睡眠防止 A连续生产10个

		} catch (InterruptedException e) {

			// TODO Auto-generated catch block

			e.printStackTrace();

		}

		   

	   }

		

	}

}

class   StatusB implements Runnable{

		private CharQueue queueA;

		private CharQueue queueB;

		private int count=10;

		StatusB(CharQueue queueA,CharQueue queueB){

			this.queueA=queueA;

			this.queueB=queueB;

		}



		@Override

		public void run() {

		   while(count>0){

			  

			try { 

				AChar aChar;

				aChar = queueA.take();

				   System.out.print(aChar.getStatus());

				   aChar.B();			          

				   queueB.add(aChar);

				   count--;

			} catch (InterruptedException e) {

				// TODO Auto-generated catch block

				e.printStackTrace();

			}



			   

		   }

			

		}

}

	



class   StatusC implements Runnable{

	private CharQueue queueC;

	private CharQueue queueB;

	private int count=10;

	StatusC(CharQueue queueB,CharQueue queueC){

		this.queueC=queueC;

		this.queueB=queueB;

	}



	@Override

	public void run() {

	   while(count>0){

		 



			try {

				   AChar aChar;

				   aChar = queueB.take();

				   System.out.print(aChar.getStatus());

				   aChar.C();			          

				   queueC.add(aChar);

				   count--;

			} catch (InterruptedException e) {

				// TODO Auto-generated catch block

				e.printStackTrace();

			}



	

		   

	   }

		

	}

}

	class   Finish implements Runnable{

		private CharQueue queueC;

		private int count=10;

		Finish(CharQueue queueC){

			this.queueC=queueC;

		}



		@Override

		public void run() {

		   while(count>0){

			 



				try {

					   AChar aChar;

					   aChar = queueC.take();

					   System.out.print(aChar.getStatus());

					   count--;

				} catch (InterruptedException e) {

					// TODO Auto-generated catch block

					e.printStackTrace();

				}



		

			   

		   }

			

		}

}

	

	





public  class Csdn{

		public static void main(String [] args){

			CharQueue queueA=new CharQueue();

			CharQueue queueB=new CharQueue();

			CharQueue queueC=new CharQueue();

			ExecutorService exec=Executors.newCachedThreadPool();

			exec.execute(new StatusA(queueA));

			exec.execute(new StatusB(queueA,queueB));

			exec.execute(new StatusC(queueB,queueC));

			exec.execute(new Finish(queueC));

			

			

		}	

}

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meran 2011-08-07

package Csdn;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;

class AChar {

public enum Status{ A,B,C};
private Status status=Status.A;
public void B(){status=Status.B;};
public void C(){status=Status.C;};
public Status getStatus(){return status;}
}

class CharQueue extends LinkedBlockingQueue<AChar>{

}

class StatusA implements Runnable{
private CharQueue queueA;
private int count=10;
StatusA(CharQueue queueA){
this.queueA=queueA;
}

@Override
public void run() {
while(count>0){

try {
queueA.add(new AChar());
count--;
TimeUnit.MILLISECONDS.sleep(1000);
//此处睡眠防止 A连续生产10个
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}
}
class StatusB implements Runnable{
private CharQueue queueA;
private CharQueue queueB;
private int count=10;
StatusB(CharQueue queueA,CharQueue queueB){
this.queueA=queueA;
this.queueB=queueB;
}

@Override
public void run() {
while(count>0){

try {
AChar aChar;
aChar = queueA.take();
System.out.print(aChar.getStatus());
aChar.B();
queueB.add(aChar);
count--;
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}
}

class StatusC implements Runnable{
private CharQueue queueC;
private CharQueue queueB;
private int count=10;
StatusC(CharQueue queueB,CharQueue queueC){
this.queueC=queueC;
this.queueB=queueB;
}

@Override
public void run() {
while(count>0){

try {
AChar aChar;
aChar = queueB.take();
System.out.print(aChar.getStatus());
aChar.C();
queueC.add(aChar);
count--;
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}
}
class Finish implements Runnable{
private CharQueue queueC;
private int count=10;
Finish(CharQueue queueC){
this.queueC=queueC;
}

@Override
public void run() {
while(count>0){

try {
AChar aChar;
aChar = queueC.take();
System.out.print(aChar.getStatus());
count--;
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}
}

public class Csdn{
public static void main(String [] args){
CharQueue queueA=new CharQueue();
CharQueue queueB=new CharQueue();
CharQueue queueC=new CharQueue();
ExecutorService exec=Executors.newCachedThreadPool();
exec.execute(new StatusA(queueA));
exec.execute(new StatusB(queueA,queueB));
exec.execute(new StatusC(queueB,queueC));
exec.execute(new Finish(queueC));

}
}

用生产者消费者队列做的。。哈哈还算优雅把

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meran 2011-08-07

[Quote=引用 4 楼 daijope 的回复:]
引用 3 楼 zqfddqr 的回复:

晚上要还没人回就写个正确的~~~~~~~~~~~~~。。。。。。。。。。。。

请问锁住notify(),与wait()方法的对象必须是同一个对象吗？
[/Quote]

做同步当然要在同一个对象上

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杰克和仙豆 2011-08-07

有要求一定得用线程的ID么

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singlark 2011-08-07



package algorithm;



public class Abc implements Runnable{

	

	//构造函数

	public Abc() {

		new Thread(new A()).start();

		new Thread(new B()).start();

		new Thread(new C()).start();

	}

	

	//自身线程

	@Override

	public void run() {

		while(true) {

			try {

				Thread.sleep(5000);

			} catch (InterruptedException e) {

				e.printStackTrace();

			}

			synchronized(this) {

				notifyAll();

			}

		}

	}

	

	//sync

	public synchronized void print(Object obj) {

		System.out.println(obj.getClass().getName());

		try {

			wait();

		} catch (InterruptedException e) {

			e.printStackTrace();

		}

	}



	//线程A

	public class A implements Runnable {



		@Override

		public void run() {

			while (true) {

				print(this);

			}

		}

		

	}

	

	//线程B

	public class B implements Runnable {

		

		@Override

		public void run() {

			while (true) {

				try {

					Thread.sleep(1000);

				} catch (InterruptedException e) {

					e.printStackTrace();

				}

				print(this);

			}

		}

		

	}

	

	//线程C

	public class C implements Runnable {



		@Override

		public void run() {

			while (true) {

				try {

					Thread.sleep(2000);

				} catch (InterruptedException e) {

					e.printStackTrace();

				}

				print(this);

			}

		}

		

	}

	

	//main

	public static void main(String[] args) {

		new Thread(new Abc()).start();

	}



}

随便写的，解决的可能不是很优雅。这是无数次的，至于10次的自己改吧...

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daijope 2011-08-07

[Quote=引用 1 楼 zqfddqr 的回复:]

Java code

package csdn;

/**
* 顺序打印ABC
* @author Administrator
*
*/
public class ThreadPrint {

public static void main(String[] args) {
A a = new A();

for (int i = 0……
[/Quote]

希望你写一下。。。。

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daijope 2011-08-07

[Quote=引用 3 楼 zqfddqr 的回复:]

晚上要还没人回就写个正确的~~~~~~~~~~~~~。。。。。。。。。。。。
[/Quote]

请问锁住notify(),与wait()方法的对象必须是同一个对象吗？

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zqfddqr 2011-08-07

晚上要还没人回就写个正确的~~~~~~~~~~~~~。。。。。。。。。。。。

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zqfddqr 2011-08-07

呃！
发错了、、、

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zqfddqr 2011-08-07





package csdn;



/** 

 * 顺序 打印ABC 

 * @author Administrator 

 * 

 */

public class ThreadPrint {



    public static void main(String[] args) {

        A a = new A();



        for (int i = 0; i < 10; i++) {

            MyThread mt1 = new MyThread(a);

            mt1.start();

        }

    }

}



class A {



    private char[] c = {'A', 'B', 'C'};

    private int index;



    public char[] getC() {

        return c;

    }



    public synchronized void execute() {



        if (index >= c.length) {

            index = 0;

        } else {

            System.out.println(c[index++]);

        }

    }

}



class MyThread extends Thread {



    private A a;



    public MyThread(A a) {

        this.a = a;

    }



    public void run() {

        synchronized (a) {

            int index = a.getC().length;

            for (int i = 0; i <= index; i++) {

                a.execute();

            }

            System.out.println("===============");

        }

    }

}

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