B4J Question find IP PC

import java.net.*;

        Button btnNewButton = new Button(shell, SWT.NONE);
        btnNewButton.addSelectionListener(new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
            try {
                InetAddress ip= InetAddress.getLocalHost();
                JOptionPane.showMessageDialog(null,ip.getHostAddress());
              
            } catch (UnknownHostException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }