Hi, I'm trying to make the user select the language of a very simple menu.
I post here the 2 classes: Menus and Selector.
In the Menus class, there are 2 items: File and Help
When you click on File then you select Configuration, and it shows the Selector class which is only a ComboBox, where you select the Language.

The Menus class is in part internationalized because I defined a Resources.properties file with this pairs:

TITLE=Internationalization!
FILE=File
HELP=Help
OPEN=Open
CONFIGURATION=Configuration

So that's first step is done, and it works fine, now I need the end user to select the language in the Configuration combo box and on the fly load TITLE, FILE,HELP,OPEN and CONFIGIRATION from an appropiate Resourses_es_ESP.properties file that I've already created, if for example he selects Spanish, that properties file has this pairs:
TITLE=Internationacionalizacion
FILE=Archivo
HELP= Ayuda
OPEN=Abrir
CONFIGURATION=Configuracion.

Any help please?

Here is the menu class just to select the Configuration option:

Code:
import java.awt.event.*;
import java.util.ResourceBundle; 


public class Menus extends javax.swing.JFrame
{
ResourceBundle res = ResourceBundle.getBundle("Resources");

public Menus()
{
setSize(500, 300); 
String title = res.getString("TITLE");
this.setTitle(title); 
initComponents(); 
}


private void initComponents()
{
jmbarBarraDeMenus = new javax.swing.JMenuBar();

jmnuArchivo = new javax.swing.JMenu();
String fi = res.getString("FILE"); 
jmnuArchivo.setText(fi);
jmbarBarraDeMenus.add(jmnuArchivo);
jmbarBarraDeMenus.add(jmnuArchivo);

jmnuHelp = new javax.swing.JMenu();
String hel = res.getString("HELP"); 
jmnuHelp.setText(hel);
jmbarBarraDeMenus.add(jmnuHelp);

jmnuAbrir = new javax.swing.JMenuItem();
String op = res.getString("OPEN"); 
jmnuAbrir.setText(op);


jmnuArchivo.add(jmnuAbrir);


jmnuConfigura = new javax.swing.JMenuItem();
String co = res.getString("CONFIGURATION"); 
jmnuConfigura.setText(co);
jmnuArchivo.add(jmnuConfigura);
jmnuConfigura.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
jMenuConf_actionPerformed(e);
}
});



getContentPane().setLayout(null);
addWindowListener(new java.awt.event.WindowAdapter()
{
public void windowClosing(java.awt.event.WindowEvent evt)
{
exitForm(evt);
}
}); 
setJMenuBar(jmbarBarraDeMenus);
}//GEN-END:initComponents

/** Exit the Application */
private void exitForm(java.awt.event.WindowEvent evt) {
System.exit (0);
}



void jMenuConf_actionPerformed(ActionEvent e) {
Selector dlg = new Selector();
dlg.setVisible(true) ;


}


public static void main (String args[])
{
new Menus().setVisible(true);
}

private javax.swing.JMenuBar jmbarBarraDeMenus;
private javax.swing.JMenu jmnuArchivo;
private javax.swing.JMenu jmnuHelp;
private javax.swing.JMenuItem jmnuAbrir; 
private javax.swing.JMenuItem jmnuConfigura; 

}


and here is the Selector class, just a combo box to select the language

Code:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class Selector extends javax.swing.JFrame
{
/** Creates new form CAplicación */
private javax.swing.JLabel jEtSaludo;
private javax.swing.JButton jBtSaludo;
public Selector() // constructor
{
setSize(300, 200); // tamaño del formulario
setTitle("Language Selector"); // título del formulario
initComponents(); // iniciar controles o componentes
}

private void initComponents()//GEN-BEGIN:initComponents
{

getContentPane().setLayout(null);
addWindowListener(new java.awt.event.WindowAdapter()
{
public void windowClosing(java.awt.event.WindowEvent evt)
{
exitForm(evt);
}
});


String[] langStrings = { "Spanish", "French", "Dutch", "Chinese", "English" };

JComboBox langList = new JComboBox(langStrings);
langList.setSelectedIndex(4);
getContentPane().add(langList);
langList.setBounds(42,90,204,30);


}//GEN-END:initComponents

/** Exit the Application */
private void exitForm(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_exitForm
System.exit (0);
}//GEN-LAST:event_exitForm

private void langListActionPerformed(java.awt.event.ActionEvent evt)
{
//do something

}
/**
* @param args the command line arguments
*/
public static void main (String args[])
{
new Selector().setVisible(true);
}


}