what is wrong with this code it gives error

Question

can anyone tell me that what is wrong with this code it returns the error of syntax error. can anyone fix it ?

dos.writeBytes(twoHyphens + boundary + lineEnd); 
dos.writeBytes("Content-Disposition: form-data; name="uploaded_file";filename=""
+ fileName + """ + lineEnd);'

and its second part at catch it returns error. check this one please:

runOnUiThread(new Runnable() {
public void run() {
String msg = "File Upload Completed.\n\n See uploaded file here : \n\n"
             +http://www.androidexample.com/media/uploads/"
             +uploadFileName;
messageText.setText(msg);
Toast.makeText(UploadToServer.this, "File Upload Complete.",Toast.LENGTH_SHORT).show();
      }
    });                
  }    
fileInputStream.close();
dos.flush();
dos.close();
} catch (MalformedURLException ex) {
  dialog.dismiss();  
  ex.printStackTrace();
runOnUiThread(new Runnable() {
 public void run() {
 messageText.setText("MalformedURLException Exception : check script url.");
 Toast.makeText(UploadToServer.this, "MalformedURLException",Toast.LENGTH_SHORT).show();

 }
 });
 Log.e("Upload file to server", "error: " + ex.getMessage(), ex);  
 } catch (Exception e) {
 dialog.dismiss();  
 e.printStackTrace();
 runOnUiThread(new Runnable() {
 public void run() {
  messageText.setText("Got Exception : see logcat ");
  Toast.makeText(UploadToServer.this, "Got Exception : see logcat ",Toast.LENGTH_SHORT).show();
  }});
 Log.e("Upload file to server Exception", "Exception : " + e.getMessage(), e);  
  }
  dialog.dismiss();       
  return serverResponseCode;              
 } // End else block
} 
}
 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
 getMenuInflater().inflate(R.menu.upload_to_server, menu);
 return true;
 }
}

Answer 1

 dos.writeBytes("Content-Disposition: form-data; name=\"uploaded_file\";\"filename=\""+ fileName + "\"" + lineEnd);

double qoutes are not used within double qoutes, you need to put "\" (backslash)