Java - Abrir una ventana desde un boton en un JPanel

package vista;

import java.awt.BorderLayout;

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.Insets;

import java.awt.LayoutManager;

import javax.swing.JButton;

import javax.swing.JComboBox;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

import javax.swing.SwingConstants;

/**

 * 

 * @author Manuel F. Del Toro

 *

 */

public class VentanaInicioSesion extends JFrame {

	JButton buttonIngresar;

	public static void main(String[] args) {

		JFrame login = new JFrame("Sistema de Información Yamantaka");

		PanelImagen_Login imagen = new PanelImagen_Login();

		PanelDatos_Login datos = new PanelDatos_Login();

		login.add(imagen, BorderLayout.NORTH);

		login.add(datos, BorderLayout.CENTER);

		login.setSize(380, 365);

		login.setVisible(true);

		login.setResizable(false);

		login.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

	}

}

package vista;

import java.awt.Color;

import java.awt.GridBagConstraints;

import java.awt.GridBagLayout;

import java.awt.Insets;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.BorderFactory;

import javax.swing.JButton;

import javax.swing.JComboBox;

import javax.swing.JFrame;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

import javax.swing.JPasswordField;

import javax.swing.JTextField;

import javax.swing.border.Border;

public class PanelDatos_Login extends JPanel implements ActionListener{

	private JComboBox<String> comboTipoUsuario;

	private JLabel labelNombreUsuario;

	private JTextField textNombreUsuario;

	private JLabel labelContraseña;

	private JPasswordField passUsuario;

	private JButton buttonIngresar;

	public PanelDatos_Login(){

		String[] tipoUsuario = {"Cliente", "Administrador", "Asesor de Ventas"};

		comboTipoUsuario = new JComboBox<String>(tipoUsuario);

		labelNombreUsuario = new JLabel("Nombre de Usuario:");

		textNombreUsuario = new JTextField(10);

		labelContraseña = new JLabel("Contraseña:");

		passUsuario = new JPasswordField(10);

		buttonIngresar = new JButton("Ingresar");

		buttonIngresar.addActionListener(this);

		// Borde

		Color colorBorde = new Color(84,33,29);

		Border interior = BorderFactory.createLineBorder(colorBorde, 1, false);

		Border bordeInterior = BorderFactory.createTitledBorder(interior, "Inicio de Sesión", 0, 0);

		Border bordeExterior = BorderFactory.createEmptyBorder(5, 5, 10, 10);

		setBorder(BorderFactory.createCompoundBorder(bordeExterior, bordeInterior));

		/// GridBagLayout

		setLayout(new GridBagLayout());

		GridBagConstraints gbc = new GridBagConstraints();

		gbc.gridx = 0; // Fila 

		gbc.gridy = 0; // Columna

		gbc.gridwidth = 2; // Columnas que ocupa 

		gbc.gridheight =1; // Filas que ocupa

		//gbc.weightx = 1; 

		//gbc.weighty = 0;

		gbc.insets = new Insets(5, 15, 15, 1);

		gbc.anchor = GridBagConstraints.NORTH;

		gbc.fill = GridBagConstraints.CENTER;

		this.add(comboTipoUsuario, gbc);

		gbc.gridx = 0;

		gbc.gridy = 1;

		gbc.gridwidth = 1;

		gbc.gridheight = 1;

		gbc.weightx = 1;

		gbc.weighty = 0;

		gbc.insets = new Insets(5, 15, 5, 1);

		gbc.anchor = GridBagConstraints.NORTH;

		gbc.fill = GridBagConstraints.BOTH;

		this.add(labelNombreUsuario, gbc);

		gbc.gridx = 1;

		gbc.gridy = 1;

		gbc.fill = GridBagConstraints.BOTH;

		gbc.insets = new Insets(5, 15, 4, 1);

		this.add(textNombreUsuario, gbc);

		gbc.gridx = 0;

		gbc.gridy = 2;

		gbc.fill = GridBagConstraints.BOTH;

		gbc.insets = new Insets(1, 15, 4, 1);

		this.add(labelContraseña,gbc);

		gbc.gridx = 1;

		gbc.gridy = 2;

		gbc.fill = GridBagConstraints.BOTH;

		gbc.insets = new Insets(5, 15, 10, 1);

		this.add(passUsuario, gbc);

		gbc.gridx = 1;

		gbc.gridy = 3;

		gbc.fill = GridBagConstraints.BOTH;

		gbc.insets = new Insets(15, 4, 4, 10);

		this.add(buttonIngresar, gbc);

	}

	public void actionPerformed(ActionEvent e){

		if (e.getSource() == buttonIngresar) {

			VentanaPrincipal vp = new VentanaPrincipal();

			VentanaInicioSesion vlogin = new VentanaInicioSesion();

			vp.setVisible(true);

			vlogin.setVisible(false);

		}

	}

package vista;

import javax.swing.Icon;

import javax.swing.ImageIcon;

import javax.swing.JLabel;

import javax.swing.JPanel;

import javax.swing.SwingConstants;

public class PanelImagen_Login extends JPanel {

	private JLabel imagen;

	public PanelImagen_Login(){

		Icon titulo = new ImageIcon(getClass().getResource("titulo2.gif"));

		imagen = new JLabel(titulo);

		add(imagen);

	}

}

package vista;

import javax.swing.JFrame;

/**

 * 

 * @author Manuel F. Del Toro

 * 

 */

public class VentanaPrincipal extends JFrame{

	public static void main(String[] args) {

		JFrame ventanaPrincipal = new JFrame("Sistema de Información Yamantaka");

		ventanaPrincipal.setVisible(true);

		ventanaPrincipal.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		ventanaPrincipal.setSize(800,600);

	}

}

//...

private JFrame login;//agregar

	public PanelDatos_Login(JFrame login){//agregar parametro

		this.login=login;//coge la referencia para poder ser utilizada en toda la clase

		String[] tipoUsuario = {"Cliente", "Administrador", "Asesor de Ventas"};

        }

public void actionPerformed(ActionEvent e){

		if (e.getSource() == buttonIngresar) {

			VentanaPrincipal vp = new VentanaPrincipal();

			vp.setVisible(true);

			login.setVisible(false);//referencia de la ventana de inicio de session

		}

	}

PanelDatos_Login datos = new PanelDatos_Login(login);