This document defines an employee interface application in Java with multiple panels. It includes panels for employee data, salary calculations, additional calculations, and extension options. The main class InterfazEmpleado initializes and sets the layout of the various panels. It provides a GUI for viewing and modifying employee information.

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 );
}
}