Java application get suck when it execute

I made a application which sends some request packets for web servers and it get stuck when the application is running , until the packets are been sent the programs stays stuck . when the process is done it defreez it self .

any idea why ??

Code:

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    private void reqBtnActionPerformed(java.awt.event.ActionEvent evt) {
      for (i=0; i<10; i++) {

        try {
            URL url = new URL(urlTxt.getText()+":80/");
            BufferedReader in = new BufferedReader
            (new InputStreamReader(url.openStream()));

            String htmlText;

            while ((htmlText = in.readLine()) != null) {
                resultTxt.setText(resultTxt.getText()+htmlText+"\n");
            }
            in.close();
        } catch (MalformedURLException e) {
            resultTxt.setText(""+e);
        } catch (IOException e) {
              resultTxt.setText(""+e);
        }
        }
    }

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Quote:

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Originally Posted by jaambutt

i need a java application that was installed in the lod siemens mobile phones.

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huh what ?

Spam, and I'll report it.

As to your problem, the GUI of a Swing app runs in a thread called the EDT (Event Dispatch Thread). If you do a load of processing in this thread then your GUI will lock up, since it cannot process any events.

The solution is to launch any long running processes (which is most of them) into their own worker thread using a SwingWorker. See the tutorial for a good run through of this.