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    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                                 showHelloThereDialog();    }                                                    public void showHelloThereDialog() throws Exception {        Runnable showModalDialog = new Runnable() {            public void run() {                try {                    wait(500);                } catch (InterruptedException e) {                    e.printStackTrace();                }            }        };        SwingUtilities.invokeAndWait(showModalDialog);    }