package certification;

import    
import    
import    
import    
import    
  
public class Server {   
    /**  
     * @param args  
     * @throws IOException   
     */  
    public static void main(String[] args) {   
        Server manager = new Server();   
        manager.doListen();   
    }   
  
    public void doListen() {   
        ServerSocket server;   
        try {   
            server = new ServerSocket(9991);   
            while (true) {   
                Socket client = server.accept();   
                new Thread(new SSocket(client)).start();   
            }   
        } catch (IOException e) {   
            e.printStackTrace();   
        }   
  
    }   
  
    //服务器进程   
    class SSocket implements Runnable {   
  
        Socket client;   
  
        public SSocket(Socket client) {   
            this.client = client;   
        }   
  
        public  void run() {   
            DataInputStream input;   
            DataOutputStream output;   
            try {   
                input = new DataInputStream(client.getInputStream());   
                output = new DataOutputStream(client.getOutputStream());   
              String listMsg = input.readUTF();   
                output.writeUTF("Recive:  " + listMsg + "    \r\n Thx...");   
                System.out.println("Recive:   " + listMsg);   
               listMsg = input.readUTF();   
               output.writeUTF("Recive Second:  " + listMsg + "    \r\n Thx...");   
               System.out.println("Recive Second:   " + listMsg);   
            } catch (IOException e) {   
                e.printStackTrace();   
            }   
        }   
    }   
  }


我想在另外一个类中调用此类中的listMsg变量。这个怎么调用啊？请高手赐教。

把String listMsg定义为全局变量

不行的 我试过 。

   class SSocket implements Runnable {   
  
        Socket client;   
  
        public SSocket(Socket client) {   
            this.client = client;   
        }   
     String listMsg;
     public String getListMsg（）{
            return listMsg;
      }
     public void setListMsg(String listMsg){
      this.listMsg = listMsg;      
      }
  
        public  void run() {   
            DataInputStream input;   
            DataOutputStream output;   
            try {   
                input = new DataInputStream(client.getInputStream());   
                output = new DataOutputStream(client.getOutputStream());   
            
                 setListMsg(input.redUTF());
  
                output.writeUTF("Recive:  " + listMsg + "    \r\n Thx...");   
                System.out.println("Recive:   " + listMsg);   
               listMsg = input.readUTF();   
               output.writeUTF("Recive Second:  " + listMsg + "    \r\n Thx...");   
               System.out.println("Recive Second:   " + listMsg);   
            } catch (IOException e) {   
                e.printStackTrace();   
            }   
        }   
    }   
  }


你试试这样呢  在另一个类中 调用此类的getListMsg（）方法 试试；

你可以在要调用listMsg变量的类中写一个带String参数的构造方法,
在class SSocket类中把listMsg传过去,这也是一种方法,但不知道会不会有别的问题.

我调用getListMsg()的时候编译提示要我改成static。给了之后就可以调用了，但是传递的值是null。不是socket接收到的值啊
这怎么弄啊？

我试试吧 现在主要的问题是每次传递的值是null