2010-12-03 32 views
0

我想用我的手機給我的電腦發送信息,使用TCP ..我的電腦是服務器,我的電話是客戶端。我能夠從我的手機發信息給我的電腦,但在輸出中,我得到空字符..爲什麼我在輸出中收到空?

我粘貼下面我的代碼;;

客戶::

公共無效的startApp(){ 嘗試{ //建立與遠程服務器 的StreamConnection = (的StreamConnection)Connector.open(connectString中)套接字連接;

// create DataOuputStream on top of the socket connection 
    outputStream = streamConnection.openOutputStream(); 
    dataOutputStream = new DataOutputStream(outputStream); 

    // send the HTTP request 
    dataOutputStream.writeChars("Hello"); 
    dataOutputStream.flush(); 

    // create DataInputStream on top of the socket connection 
    inputStream = streamConnection.openInputStream(); 
    dataInputStream = new DataInputStream(inputStream); 

    // retrieve the contents of the requested page from Web server 
    String test=""; 
    int inputChar; 
    System.out.println("Entering read..........."); 
    while ((inputChar = dataInputStream.read()) != -1) { 
    // test=test+((char)inputShar); 
    results.append((char) inputChar); 
    } 
    System.out.println("Leaving read..........."); 
    // display the page contents on the phone screen 
    //System.out.println(" Result are "+results.toString()); 
    System.out.println(" "); 
    resultField = new StringItem(null, results.toString()); 
    System.out.println("Client says "+resultField); 
    resultScreen.append(resultField); 
    myDisplay.setCurrent(resultScreen); 

} catch (IOException e) { 
    System.err.println("Exception caught:" + e); 
} finally { 
    // free up I/O streams and close the socket connection 
    try { 
    if (dataInputStream != null) 
     dataInputStream.close(); 
    } catch (Exception ignored) {} 
    try { 
    if (dataOutputStream != null) 
     dataOutputStream.close(); 
    } catch (Exception ignored) {} 
    try { 
    if (outputStream != null) 
     outputStream.close(); 
    } catch (Exception ignored) {} 
    try { 
    if (inputStream != null) 
     inputStream.close(); 
    } catch (Exception ignored) {} 
    try { 
    if (streamConnection != null) 
     streamConnection.close(); 
    } catch (Exception ignored) {} 
} 

} 

我的服務器:

公共類主要{

/** 
* @param args the command line arguments 
*/ 
public static void main(String[] args) { 
    // TODO code application logic here 
    try{ 
     ServerSocket sck=new ServerSocket(880); 
     Socket client=sck.accept(); 
     InputStream inp= client.getInputStream(); 
     int i; 
     OutputStream out=client.getOutputStream(); 
     out.write("Testing ".getBytes()); 
     System.out.println("Server has responded   "); 
     String str=""; 
     while((i=inp.read())!=-1){ 

      str=str+((char) i); 
      System.out.println("USer says "+ str); 
     } 

    } 
    catch(Exception e){ 
     System.out.println("Error "+e); 
    } 

} 

}

我的服務器輸出;;

服務器響應
用戶說空^ h 用戶說空^ h空 用戶說空^ h空è 等等等等

我不應該得到這個空字符,爲什麼我得到它? 另一件事,我的服務器正在寫入流,但客戶端無法接收,爲什麼?我需要使用一個單獨的線程?

謝謝進階

回答

1

我猜想,是不是你真正的代碼,你的實際代碼初始化海峽爲null。

+0

我因此未初始化什麼空的,但它給了我空... – 2010-12-05 06:05:28

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