题目要求: 5个读线程,2个写线程,要求从5个读线程读入字符串,转化成大写后,放入写线程
小弟的感觉.重点.就是如果让读线程不能和两个写线程冲突问题.我的想法是写了两个写线程的CLASS,必须JOIN后才能继续(也就是不冲突),在读线程里通过取一个随机数,决定放入第一个写线程还是第二个写线程

小弟是以C++入门的,对JAVA完全有点晕,本身就不会多线程,现在用JAVA写就更糊涂了.求改错.先谢谢了...

public class ReadThread implements Runnable//读线程
   {
    private string name;
   

        public ReadThread(string name1)
           {
        this.name=name1;   

        }
   

    public void run()
    {
        int x=this.name.length();
        String m="";
        for(int i=0;i<x;i++)
         {
             if(this.name.charAt(i)>='a' && this.name.charAt(i)<='z')
               m=m+(char)(this.name.charAt(i)-32);
              else
             m=m+(char)(this.name.charAt(i));   

        }
        boolean b1=nextDBoolean();//这里产生一个随机布尔,来判定是用第一个写线程或者第二个写线程
        if (b1=true)
        {
            WriteThread1 wt1= new WriteThread(m);
            Thread t01= new Thread(wt1);
            t01.start();
            t01.join();
           

        }
        else

        {
            WriteThread2 wt2= new WriteThread(m);
            Thread t02= new Thread(wt2);
            t02.start();
            t02.join();
        }
    }
   

   

}

public class WriteThread1 implements Runnable//第一个写线程
   {
    private string name;
   

        public WriteThread1(string name1)
           {
        this.name=name1;   

        }
   

    public void run()
    {
          //code to send this.name somewhere else
    }  

}

public class WriteThread2 implements Runnable//第二个写线程,一模一样
   {
    private string name;
   

        public WriteThread2(string name1)
           {
        this.name=name1;   

        }
   

    public void run()
    {
          //code to send this.name somewhere else
    } 

}


public class TestRunnable//主程式
    {  

       

        public static void main(String[] args)
        {  

            //initialize 5 thread, for example
            ReadThread rt1= new ReadThread("abcde");
            ReadThread rt2 new ReadThread("defgh");
            ReadThread rt3 new ReadThread("a34cd");
            ReadThread rt4= new ReadThread("ABcDE");
            ReadThread rt5= new ReadThread("lzxC8");
           

            Thread t1= new Thread(rt1);
            Thread t2= new Thread(rt2);
            Thread t3= new Thread(rt3);
            Thread t4= new Thread(rt4);
            Thread t5= new Thread(rt5);
           

            t1.start();
            t2.start();
            t3.start();
            t4.start();
            t5.start();   

           

        }
    }

[ 本帖最后由 hys1986 于 2011-5-23 07:53 编辑 ]

谢谢楼上两位的回复.感谢2,3L改错
这个是一道考试题.
我感觉其实是考验的是如何来分配5个读和2个写的线程,不是要真正实现什么...所谓写线程就是直接把5个字符丢过去就行了..原题如此

原题如下..

 Implement a multithreaded application in the following manner: 5 reader threads read from 5 character data streams convert data to upper case and pass the converted data to 2 writer threads. It does not matter what language or threading package you use.


[ 本帖最后由 hys1986 于 2011-5-24 20:22 编辑 ]

SOGA 那这样看行不行
我新建了一个STRING CLASS, 里面包含了字符串X和布尔READY

首先
主程序里创建两个新的STRING CLASS, A, B
创建5个读进程..读进程读到东西之后,就把STRING CLASS里的字符串设置到STRING CLASS的X里, READY设为TRUE,但是这样只能把读线程1-3给A,4-5给B(这里其实也可以随机分配)
创建两个写进程,分别不断读取A,B如果A,B的READY为TRUE,则发送文件,然后将READY改为FALSE
给A B加同步锁
这样可行么..


class string//the string class, to indicate that weather the string needs to be send and it's content
{
   private String x;
   private boolean ready=false;//indicator, if it is true, then the string needs to be send out
  public string(){
       this.x="";
       this.ready=false;
   }//default constructor
   public string(String name){
       this.x=name;
       this.ready=true;
   }//costructor with content
   public void SetString(String name){
       this.x=name;
   }//set the string
   public void SetReady(boolean ready){
       this.ready=ready;
   }//set the indicator
   public String getX(){
       return x;
   }//get the string
   public boolean getReady(){
       return ready;
   }//get the indicator   
}


此外还有个问题..主程序创建了一个CLASS的话,
我能够在进程的程序里里直接用这个CLASS的东西,而不必要将这个CLASS传递给这个这个进程么?

比如 我主程序这么开头
         string string1=new string();
         string string2=new string();
在其他THREAD里能直接调用STRING1, STRING2么.还是必须要在创建THREAD的时候就把STRING1 PASS过去..



[ 本帖最后由 hys1986 于 2011-5-25 00:22 编辑 ]