Regra de validação com Swing

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.ScrollPaneConstants;

public class TelaPrincipal extends JFrame implements ActionListener {

	private JPanel panelCima = new JPanel();
	private JPanel panelBaixo = new JPanel();
	private JPanel panelCentro = new JPanel();
	private JTextField campoUrl = new JTextField();
	private JTextField campoNome = new JTextField();
	private ButtonGroup grupoRadio = new ButtonGroup();
	private JRadioButton radioProd = new JRadioButton("Banco de Produção");
	private JRadioButton radioHomo = new JRadioButton("Banco de Homologação");
	private JRadioButton radioDev = new JRadioButton("Banco de Desenvolvimento");
	private JLabel labelUrl = new JLabel("URL de conexão:");
	private JLabel labelNome = new JLabel("Usuário:");
	private JLabel labelSenha = new JLabel("Senha:");
	private JLabel labelLog = new JLabel("Log:");
	private JButton botaoGerar = new JButton("Gerar script INSERT!");
	private JButton botaoExecutar = new JButton("Executar script INSERT!");
	private JPasswordField campoSenha = new JPasswordField();
	private JTextArea areaLog = new JTextArea(9, 39);
	private JScrollPane scroll = new JScrollPane(areaLog);

	public TelaPrincipal() {
		super("Programa para carregar scripts!");
		this.initComponents();

	}

	public void initComponents() {
		this.grupoRadio.add(radioProd);
		this.grupoRadio.add(radioHomo);
		this.grupoRadio.add(radioDev);
		this.radioDev.addActionListener(this);
		this.radioHomo.addActionListener(this);
		this.radioProd.addActionListener(this);

		this.scroll
				.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
		this.scroll
				.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
		this.areaLog.setLineWrap(true);

		// Adição dos componentes nos seus painéis
		this.panelCima.add(radioProd);
		this.panelCima.add(radioHomo);
		this.panelCima.add(radioDev);
		this.panelCima.add(labelUrl);
		this.panelCima.add(campoUrl);
		this.panelCima.add(labelNome);
		this.panelCima.add(campoNome);
		this.panelCima.add(labelSenha);
		this.panelCima.add(campoSenha);
		this.panelCima.setLayout(new BoxLayout(panelCima, BoxLayout.Y_AXIS));
		this.panelCentro.add(labelLog);
		this.panelCentro.add(scroll);
		this.panelBaixo.add(botaoGerar);
		this.panelBaixo.add(botaoExecutar);

		// Adição e organização dos painéis no Frame.
		this.add(BorderLayout.NORTH, panelCima);
		this.add(BorderLayout.CENTER, panelCentro);
		this.add(BorderLayout.SOUTH, panelBaixo);
		this.setSize(455, 415);
		this.setVisible(true);
		this.setResizable(false);
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		if ((this.radioDev.isSelected() || this.radioHomo.isSelected() || this.radioProd
				.isSelected()) == false) {
			this.botaoExecutar.setEnabled(false);
			this.botaoGerar.setEnabled(false);
		}

	}

	public JTextField getCampoUrl() {
		return campoUrl;
	}

	public void setCampoUrl(JTextField campoUrl) {
		this.campoUrl = campoUrl;
	}

	public JTextField getCampoNome() {
		return campoNome;
	}

	public void setCampoNome(JTextField campoNome) {
		this.campoNome = campoNome;
	}

	public JRadioButton getRadioProd() {
		return radioProd;
	}

	public void setRadioProd(JRadioButton radioProd) {
		this.radioProd = radioProd;
	}

	public JRadioButton getRadioHomo() {
		return radioHomo;
	}

	public void setRadioHomo(JRadioButton radioHomo) {
		this.radioHomo = radioHomo;
	}

	public JRadioButton getRadioDev() {
		return radioDev;
	}

	public void setRadioDev(JRadioButton radioDev) {
		this.radioDev = radioDev;
	}

	public JPasswordField getCampoSenha() {
		return campoSenha;
	}

	public void setCampoSenha(JPasswordField campoSenha) {
		this.campoSenha = campoSenha;
	}

	public JTextArea getAreaLog() {
		return areaLog;
	}

	public void setAreaLog(JTextArea areaLog) {
		this.areaLog = areaLog;
	}

	public JButton getBotaoGerar() {
		return botaoGerar;
	}

	public void setBotaoGerar(JButton botaoGerar) {
		this.botaoGerar = botaoGerar;
	}

	public JButton getBotaoExecutar() {
		return botaoExecutar;
	}

	public void setBotaoExecutar(JButton botaoExecutar) {
		this.botaoExecutar = botaoExecutar;
	}

	@Override
	public void actionPerformed(ActionEvent e) {
		if(this.radioDev.isSelected()){
			this.botaoExecutar.setEnabled(true);
			this.botaoGerar.setEnabled(false);
		}
		if(this.radioHomo.isSelected()) {
			this.botaoExecutar.setEnabled(true);
			this.botaoGerar.setEnabled(true);
		}
		if(this.radioProd.isSelected()){
			this.botaoExecutar.setEnabled(false);
			this.botaoGerar.setEnabled(true);
		}
		
	}

}