Problème AWT/SWING

static JButton button = new JButton("Start");
 static JFrame frame = new JFrame();
 static JTextArea console = new JTextArea();
 static PrintStream out = new PrintStream( new TextAreaOutputStream(console));

public static void setup(){
  button.setBorder(BorderFactory.createMatteBorder(2, 2, 2, 2, Color.DARK_GRAY));
  button.setBounds(0, 1, 1, 1);
  frame.setVisible(true);
  frame.setTitle("VodKa");
  frame.setSize(900, 400);
  frame.add(button);
  //frame.getContentPane().add(button, BorderLayout.EAST);
  //frame.add(button);
  console.setEditable(false);
  console.setSize(900, 200);
  frame.getContentPane().add(console);
  frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 }

 public static void main(String[] args) throws Exception{

  setup();
  System.setOut(out);
  System.setErr(out);

        executeCommand("cmd /c help");

 }

 public static void executeCommand(String cmd) throws Exception {
  Process ls_proc = Runtime.getRuntime().exec(cmd);
        InputStream stdin = ls_proc.getInputStream();
        InputStreamReader isr = new InputStreamReader(stdin);
        BufferedReader br = new BufferedReader(isr);
        String line = null;
        while ( (line = br.readLine()) != null)
             System.out.println(line);
        int exitVal;
  exitVal = ls_proc.waitFor();
  System.out.println("Process exitValue: " + exitVal);
 }