Java NegativeArraySizeException异常解决方案

try {

      connection = (HttpConnection)Connector.open( "http://someurl.xml" ,Connector.READ_WRITE);

      URLEncodedPostData postData = new URLEncodedPostData(URLEncodedPostData.DEFAULT_CHARSET, false );

      postData.append( "username" , "loginapi" );

      postData.append( "password" , "myapilogin" );

      postData.append( "term" , word);

      connection.setRequestMethod(HttpConnection.POST);

      connection.setRequestProperty( "Content-Type" , "application/x-www-form-urlencoded" );

      connection.setRequestProperty( "User-Agent" , "Profile/MIDP-2.0 Configuration/CLDC-1.0" );

      requestOut = connection.openOutputStream();

      requestOut.write(postData.getBytes());

      String contentType = connection.getHeaderField( "Content-type" );

      detailIn = connection.openInputStream();       

      int length = ( int ) connection.getLength();

      ByteArrayOutputStream baos = new ByteArrayOutputStream();

      if (length > 0 ){ //这里长度没有判定的情况下，byte array长度若为-1会产生错误

          byte info[] = new byte [length];

          int bytesRead = detailIn.read(info);

          while (bytesRead > 0 ) {

              baos.write(info, 0 , bytesRead);

              bytesRead = detailIn.read(info);

              }

          baos.close();

          connection.close();

          requestSuceeded(baos.toByteArray(), contentType);

          detailIn.read(info);

      }

      else

      {

           System.out.println( "Negative array size" );

      }

            requestOut.close();

            detailIn.close();

            connection.close();

     }