1. import java.awt.BorderLayout;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.*;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.*;
import javax.swing.border.CompoundBorder;
import javax.swing.border.EmptyBorder;
import javax.swing.border.TitledBorder;
public class InterfazEmpleado extends JFrame
{
private PanelDatos panelDatos;
private PanelSalario panelSalario;
private PanelConsultas panelConsultas;
private PanelExtensiones panelExtensiones;

2. public InterfazEmpleado( )
{
setTitle( "Sistema de Empleados" );
JPanel panelCentral = new JPanel( );
panelDatos = new PanelDatos( );
panelSalario = new PanelSalario( );
panelConsultas = new PanelConsultas( );
panelExtensiones = new PanelExtensiones( );
getContentPane( ).add( panelDatos, BorderLayout.NORTH );
getContentPane( ).add( panelCentral, BorderLayout.CENTER );
getContentPane( ).add( panelExtensiones, BorderLayout.SOUTH );
panelCentral.setLayout( new BorderLayout( ) );
panelCentral.add( panelSalario, BorderLayout.NORTH );
panelCentral.add( panelConsultas, BorderLayout.CENTER );
setSize( 530, 530 );
setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
}
public static void main( String[] args )
{
InterfazEmpleado femp = new InterfazEmpleado( );
femp.setVisible( true );
}
}

3. class PanelConsultas extends JPanel implements ActionListener
{
private final static String CALCULAR_EDAD = "CALCULAR EDAD";
private final static String CALCULAR_ANTIGUEDAD = "CALCULAR ANTIGUEDAD";
private final static String CALCULAR_PRESTACIONES = "CALCULAR PRESTACIONES";
private JTextField txtEdad;
private JTextField txtAntiguedad;
private JTextField txtPrestaciones;
private JButton butEdad;
private JButton butAntiguedad;
private JButton butPrestaciones;
public PanelConsultas( )
{
GridBagLayout gridbag = new GridBagLayout( );
setLayout( gridbag );
setBorder( new CompoundBorder( new EmptyBorder( 0, 0, 5, 0 ), new TitledBorder( "Cálculos" ) )
);
butEdad = new JButton( );
GridBagConstraints gbc = new GridBagConstraints( 0, 0, 1, 1, 0, 0, GridBagConstraints.CENTER,
GridBagConstraints.BOTH, new
Insets( 5, 5, 5, 5 ), 0, 0 );
add( butEdad, gbc );
butAntiguedad = new JButton( );
gbc = new GridBagConstraints( 0, 1, 1, 1, 0, 0, GridBagConstraints.CENTER,
GridBagConstraints.BOTH, new Insets( 5, 5, 5,

4. 5 ), 0, 0 );
add( butAntiguedad, gbc );
butPrestaciones = new JButton( );
gbc = new GridBagConstraints( 0, 2, 1, 1, 0, 0, GridBagConstraints.CENTER,
GridBagConstraints.BOTH, new Insets( 5, 5, 5,
5 ), 0, 0 );
add( butPrestaciones, gbc );
txtEdad = new JTextField( 10 );
gbc = new GridBagConstraints( 1, 0, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( txtEdad, gbc );
txtEdad.setEnabled( false );
txtAntiguedad = new JTextField( 10 );
gbc = new GridBagConstraints( 1, 1, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( txtAntiguedad, gbc );
txtAntiguedad.setEnabled( false );
txtPrestaciones = new JTextField( 10 );
gbc = new GridBagConstraints( 1, 2, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( txtPrestaciones, gbc );
txtPrestaciones.setEnabled( false );
butEdad.setText( "Calcular Edad" );
butEdad.setActionCommand( PanelConsultas.CALCULAR_EDAD );

5. butEdad.addActionListener( this);
butAntiguedad.setText( "Calcular Antigüedad" );
butAntiguedad.setActionCommand( PanelConsultas.CALCULAR_ANTIGUEDAD );
butPrestaciones.setText( "Calcular Prestaciones" );
butPrestaciones.setActionCommand( PanelConsultas.CALCULAR_PRESTACIONES );
}
public void actionPerformed( ActionEvent evento )
{
String cadena = "";
if ( evento.getSource().equals("Calcular Edad"))
cadena = "campoTexto1: " + evento.getActionCommand();
JOptionPane.showMessageDialog(null, cadena);
}
}
class PanelDatos extends JPanel
{
private JLabel labNombre;
private JLabel labApellido;
private JLabel labFIngreso;
private JLabel labFNacimiento;
private JLabel labSexo;
private JTextField txtNombre;
private JTextField txtApellido;
private JTextField txtFIngreso;
private JTextField txtFNacimiento;
private JTextField txtSexo;

6. private JLabel labImagen;
public PanelDatos( )
{
GridBagLayout gridbag = new GridBagLayout( );
setLayout( gridbag );
setBorder( new CompoundBorder( new EmptyBorder( 0, 0, 5, 0 ), new TitledBorder( "Datos
Personales" ) ) );
GridBagConstraints gbc;
labNombre = new JLabel( "Nombre: " );
gbc = new GridBagConstraints( 0, 0, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( labNombre, gbc );
labApellido = new JLabel( "Apellido: " );
gbc = new GridBagConstraints( 0, 1, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( labApellido, gbc );
labSexo = new JLabel( "Sexo: " );
gbc = new GridBagConstraints( 0, 2, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( labSexo, gbc );
labFNacimiento = new JLabel( "Fecha de Nacimiento: " );

7. gbc = new GridBagConstraints( 0, 3, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( labFNacimiento, gbc );
labFIngreso = new JLabel( "Fecha de Ingreso: " );
gbc = new GridBagConstraints( 0, 4, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( labFIngreso, gbc );
txtNombre = new JTextField( 15 );
gbc = new GridBagConstraints( 1, 0, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( txtNombre, gbc );
txtNombre.setEnabled( false );
txtApellido = new JTextField( 15 );
gbc = new GridBagConstraints( 1, 1, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( txtApellido, gbc );
txtApellido.setEnabled( false );
txtSexo = new JTextField( 2 );
gbc = new GridBagConstraints( 1, 2, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( txtSexo, gbc );
txtSexo.setEnabled( false );

8. txtFNacimiento = new JTextField( 10 );
gbc = new GridBagConstraints( 1, 3, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( txtFNacimiento, gbc );
txtFNacimiento.setEnabled( false );
txtFIngreso = new JTextField( 10 );
gbc = new GridBagConstraints( 1, 4, 1, 1, 0, 0, GridBagConstraints.WEST,
GridBagConstraints.NONE, new Insets( 5, 5, 5, 5
), 0, 0 );
add( txtFIngreso, gbc );
txtFIngreso.setEnabled( false );
labImagen = new JLabel( );
gbc = new GridBagConstraints( 2, 0, 1, 5, 1, 1, GridBagConstraints.CENTER,
GridBagConstraints.BOTH, new Insets( 5, 5, 5, 5 ),
0, 0 );
add( labImagen, gbc );
}
}
class PanelSalario extends JPanel
{
private final static String BUT_MODIFICAR_SALARIO = "MODIFICAR SALARIO";
private JLabel labSalario;
private JTextField txtSalario;
private JButton botonModificarSalario;

9. public PanelSalario( )
{
setLayout( new FlowLayout( ) );
labSalario = new JLabel( "Salario: " );
add( labSalario );
txtSalario = new JTextField( 10 );
add( txtSalario );
botonModificarSalario = new JButton( );
botonModificarSalario.setText( "Modificar" );
botonModificarSalario.setActionCommand( PanelSalario.BUT_MODIFICAR_SALARIO );
add( botonModificarSalario );
setBorder( new CompoundBorder( new EmptyBorder( 0, 0, 5, 0 ), new TitledBorder( "Salario" ) ) );
txtSalario.setEnabled( false );
}
}
class PanelExtensiones extends JPanel
{
private final String OPCION_1 = "opcion1";
private final String OPCION_2 = "opcion2";
private JButton butOpcion1;
private JButton butOpcion2;
public PanelExtensiones( )
{
setBorder( new CompoundBorder( new EmptyBorder( 0, 0, 5, 0 ), new TitledBorder( "Puntos de
Extensión" ) ) );

10. setLayout( new FlowLayout( ) );
butOpcion1 = new JButton( "Opción 1" );
butOpcion1.setActionCommand( OPCION_1 );
butOpcion2 = new JButton( "Opción 2" );
butOpcion2.setActionCommand( OPCION_2 );
add( butOpcion1 );
add( butOpcion2 );
}
}