这是怎么回事？高手请进!

Question

public class IllegalMonitorStateException
extends RuntimeException
Thrown to indicate that a thread has attempted to wait on an object's monitor or to notify other threads waiting on an object's monitor without owning the specified monitor. 
----------------有些类似线程里的死锁。

Answer 1

是不是你用的方法已经被deprecated啊？？

Answer 2

谢谢大家：
我现在把源程序提供如下：
//*  服务端
import java.io.*;
import java.net.*;
import java.util.*;
public class Testserver extends Thread{ public static void main(String Args[])
{int Pport=8005;
ServerSocket Hhost=null;
 Socket  Cilent=null;
Reader read=null;
Writer write=null;
String buffer;
DataInputStream  In=null;
Testserver mee=new Testserver();try{
Hhost=new ServerSocket(Pport);
        System.out.println("Thank you ,listening at port:"+Integer.toString(Pport));
   }
        catch(IOException e)
{
e.printStackTrace();
                        System.exit(1); }try{    Cilent=Hhost.accept();
        In=new DataInputStream(Cilent.getInputStream());
   }
    catch(IOException e)
{
                         System.out.println("error in waiting.!");  
                         System.exit(1);
}
                 
                  read=new Reader(Cilent);
                  write=new Writer(Cilent);
                  mee.start();
                  read.start();
                  write.start();
 try{ mee.wait();}
          catch(InterruptedException e){ System.exit(1);}
          try{                  buffer=In.readLine();
                               if(buffer.equalsIgnoreCase("come from others:  exit")){
                             mee.notify();}
             }
           catch(IOException e)
{
                        System.exit(1); }
try{if(Cilent!=null){
Cilent.close();
Cilent=null;
}
if(Hhost!=null){
    Hhost.close();
   Hhost=null;
}
   } catch(IOException e)
{
                        System.out.println("error in close sockets!");
                         System.exit(1);
}
System.out.println("GOOD BYE,SEE YOU NEXT!");
System.exit(0);
}}
//*客户端
import java.io.*;
import java.net.*;
import java.util.*;
public class Testcilent extends Thread{  
public static void main(String Args[])
{int Pport=8005;
 Socket  Cilent=null;
Testcilent mee=null;
DataInputStream  In=null;
String buffer;
try{
 Cilent=new Socket("127.0.0.1",Pport);
         In=new DataInputStream(Cilent.getInputStream());
            //*初始化流
        System.out.println("Thank you ,connecting to :"+"127.0.0.1");
   }
        catch(IOException e)
                {
                        System.out.println("error in connecting or io error!");
                          System.exit(1);
}
            Reader   read=new Reader(Cilent);
              Writer  write=new Writer(Cilent);  
                     mee=new Testcilent();
                      mee.start();
                  read.start();
                  write.start();
           try{ mee.wait();}
          catch(InterruptedException e){ System.exit(1);}
          try{                  buffer=In.readLine();
                               if(buffer.equalsIgnoreCase("come from others:  exit")){
                             mee.notify();}
             }
           catch(IOException e)
{
                        System.exit(1); }
try{Cilent.close();
   } catch(IOException e)
{
                        System.out.println("error in close socket!");
                         System.exit(1); }
}
}
 
体重还有两个类共上面使用
分别为:Writer,Reader
import java.io.*;
import java.net.*;
import java.util.*;
public class Reader extends Thread{
 PrintStream  Out=null; 
int buf;
char c=' ';
String buffer;
StringBuffer cache=new StringBuffer();
public Reader(Socket me)
{try{
Out=new PrintStream(me.getOutputStream()); 
}catch(IOException e)
{
e.printStackTrace();
                        System.out.println("io error.!"); }
}
public void run()
{ while(true){
        try{   System.out.println();    while(c!='\n') { 
                                buf=System.in.read();
                                  c=(char)buf;
                                  cache.append(c);
                                    }
                                  if(cache.length()>2)
                                 Out.print("\ncome from others:  "+cache);
                                 cache=null;
                                 cache=new StringBuffer();
                                 c=' '; 
                                 Out.flush(); 
          } catch(IOException e)
{
e.printStackTrace();
                        System.out.println("io error.!");
                           System.exit(1);
}
             }}
}
import java.io.*;
import java.net.*;
import java.util.*;
public class Writer extends Thread{
DataInputStream  In=null;
 PrintStream  Out=null; 
String buffer;
String newstring=null;
public Writer(Socket me )
{try{In=new DataInputStream(me.getInputStream());
    Out=new PrintStream(me.getOutputStream()); 
    }catch(IOException e)
{
e.printStackTrace();
                        System.out.println("io error.!"); }
}
public void run()
{while(true){
   try{       
         buffer=In.readLine();
      }
          catch(IOException e)
{
e.printStackTrace();
                        System.out.println("io error.!"); }
                               if(buffer.equalsIgnoreCase("come from others:  exit"))
                               {
                              Out.println("come from others:  exit"); 
                              Out.flush();
                               break;
                               }                                 
                               else {
                                      try{
                    if(!(buffer==null||buffer.equals(""))) 
                    newstring=new String(buffer.getBytes("gb2312"),"ISO8859_1");
                    else newstring=new String(buffer);
                                         }
                                catch(UnsupportedEncodingException e)
                                      {
                                          newstring=new String(buffer);
                                       }
                                    }
System.out.println(newstring);   
 System.out.flush();         
      } 
 System.exit(0);}
}务必将这两个类先编译
高手指导把，谢谢啦

Answer 3

1.wait()方法不能用在线程中!
2.这里先用sleep()代替.
3.如果一定要用wait(),改写程序吧.