SELECTIONE ITEM D'UN CHOICE AVEC LE CLAVIER

import java.awt.*;
import java.util.*;
import java.awt.event.*;

public class MenuDeroulant extends Choice implements FocusListener, KeyListener {
	String nomDuMenu;
	String [] tableau;
	Vector vecteurPremiereLettre = new Vector();
	public MenuDeroulant (String _nomDuMenu, String[] _tableau) {
		this.nomDuMenu = _nomDuMenu;
		this.tableau = _tableau;
		this.setName(nomDuMenu);
		this.addFocusListener(this);
		this.addKeyListener(this);
		this.addItem(nomDuMenu);
		for ( int i = 0; i < tableau.length; i++) {
			this.addItem(tableau[i]);
		}
	}
	public void focusGained(FocusEvent fe){
		for (int i = 0; i<this.getItemCount(); i++) {
			vecteurPremiereLettre.addElement(this.getItem(i).substring(0,1));
		}
	}
	public void focusLost(FocusEvent fe){}
	
	public void keyPressed(KeyEvent ke){
		int code = ke.getKeyCode();
		String lettreEnfonce = ke.getKeyText(code);
		int indexItem = this.getSelectedIndex();
		String premiereLettre = this.getSelectedItem().substring(0,1);
		selectione(this, lettreEnfonce, indexItem);
	}
	public void keyReleased(KeyEvent ke){}
	public void keyTyped(KeyEvent ke){}
	
	public void selectione(Choice _choix, String _touche,int _indexDepart){
            	String touche = _touche;
            	int indexDepart = _indexDepart;
            	int conserveIndexDepart;
            	if (indexDepart == 0){
            		if (this.getSelectedItem().substring(0,1).equalsIgnoreCase(touche))
            		indexDepart = indexDepart+1;
            		for (int i = indexDepart;i<this.getItemCount();i++){
            			if (touche.equalsIgnoreCase((String)vecteurPremiereLettre.elementAt(i))){
            				this.select(i);
            				break;
            			}
            		}//fin de la boucle for.
            	}
            	else {
            		conserveIndexDepart = indexDepart;
            		if (this.getSelectedItem().substring(0,1).equalsIgnoreCase(touche))
            		indexDepart = indexDepart+1;
            		if (indexDepart>this.getItemCount()-1)
            		indexDepart = 0;
            		for(int i = indexDepart; i<this.getItemCount(); i++) {
            			if (touche.equalsIgnoreCase((String)vecteurPremiereLettre.elementAt(i))){
            				this.select(i);
            				break;
            			}
            			if (i == this.getItemCount()-1) {
            				for (int ii = 0; ii < conserveIndexDepart; ii++) {
            					if (touche.equalsIgnoreCase((String)vecteurPremiereLettre.elementAt(ii))){
            						this.select(ii);
            						break;
            					}
            				}// Fin de la deuxieme boucle for (int ii = 0; ii < conserveIndexDepart; ii++)
            			}//fin de if (i == this.getItemCount()-1)
            		}//fin de la premiere boucle for(int i = indexDepart; i<this.getItemCount(); i++)
            	}// fin de else...	
	}// fin de la metode selectionne
		
}