[Java] Sprache ändern zur laufzeit

package controller;

import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import javax.swing.JOptionPane;

public class Internalization {
 private static ResourceBundle message;
 private static String language = "en";
 
 public Internalization(String lang) {
 Internalization.language = lang;
 setLanguage();
 }
 
 public static void setLanguage() {
 Locale currentLocale;
 currentLocale = new Locale(language);//what language
 try {
 message = ResourceBundle.getBundle("controller.MessageBundle", currentLocale);
 } catch (MissingResourceException e) {
 e.printStackTrace();
 JOptionPane.showConfirmDialog(null, "Could not find the language file!", "Error",
 JOptionPane.OK_OPTION, JOptionPane.ERROR_MESSAGE);
 }
 }
 
 public static ResourceBundle getMessage() {
 return message;
 }

}

 JMenu menuFile = new JMenu(Internalization.getMessage().getString("menuFile"));// Create new DropDown file 

new Internalization("en");

 IGame game = new Game((int)dialog.getNumberOfCards().getValue(),hardcoreMode);//create game
 this.game=game;//new reference
 for(int i = 0; i <= 5; i++) {//i = 0 to 5
 if (dialog.getOpenSlots()[i] == true)
 if (loop(i)) {//check for same color
 game.addPlayer(dialog.getPlayers()[i], colorConstants.get(dialog.getPlayerColor()[i]));//add player
 if (colorsAreEqual == true)//dont need to add any more player
 break;//exit for loop
 }
 }
 // If there are no or only one player, do nothing.
 if (game.getPlayers().size()<2) {
 dialog.onePlayer();//display information
 return;
 } else if (colorsAreEqual==true) {//two players have the same color
 dialog.twoColorsAreEqual();//display information
 colorsAreEqual=false;
 return;
 }
 MainFrame frame = new MainFrame(game);
 new Controller(game, frame);

package controller;

import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import javax.swing.JOptionPane;

import view.MainFrame;

public class Internalization {
 private static Locale currentLocale = new Locale("en");
 private static ResourceBundle message = ResourceBundle.getBundle("controller.MessageBundle", currentLocale);
 
 public Internalization() {
 
 }
 
 public static void changeLanguage(String lang, MainFrame frame) {
 currentLocale = new Locale(lang);//what language
 try {
 message = ResourceBundle.getBundle("controller.MessageBundle", currentLocale);
 frame.repaint();
 } catch (MissingResourceException e) {
 e.printStackTrace();
 JOptionPane.showConfirmDialog(null, "Could not find the language file!", "Error",
 JOptionPane.OK_OPTION, JOptionPane.ERROR_MESSAGE);
 }
 }
 
 
 public static ResourceBundle getMessage() {
 return message;
 }

}

 public static void main(String[] args) {
 new Internalization();
 new MainMenuController(new MainMenuFrame());
 
 }

package view;

import java.awt.Container;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionListener;

import java.util.Observable;
import java.util.Observer;

import javax.swing.*;

import model.*;
import net.miginfocom.swing.MigLayout;

public class MainFrame extends JFrame implements Observer{
 
 private static final long serialVersionUID = 1L;
 private MapScrollPane mapPanel;
 private MultifunctionalPanel multiPanel;
 private CardPreviewPanel cardPanel;
 private PlayerPane players;
 private Container content;
 private MenuBar menuBar;
 private MigLayout ml;
 private int playerNo;
 // This is the screen's size.
 private Dimension screen;
 // This is the ContentPane's size.
 private Dimension paneSize;
 private int cellHeight;
 // This is the ratio between the ContentPane's height
 // and the screen's height. Default is 0.9.
 private final double paneToScreen = 0.9;

 public MainFrame(IGame game) {
 this.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
 content = new JPanel();
 ml =new MigLayout("gap 0 0,ins 0");
 this.setLayout(ml);
 content.setLayout(ml);
 setUpFrame();
 
 // The JPanel containing all the info about the players
 players = new PlayerPane(game);
 // A panel showing the currently drawn card
 cardPanel = new CardPreviewPanel(game);
 // A JScrollPane containing the map
 // It needs game to observe player and zombie movements.
 // It needs cardPanel to get the image of the last drawn card.
 // It needs the cardNo to determine the map's size.
 mapPanel = new MapScrollPane(game,cardPanel, game.getCardNo());
 // A multifunctional JPanel which gets changed depending on game phase
 multiPanel = new MultifunctionalPanel(game);
 
 int paneWidth=getContentPane().getWidth();
 int paneHeight=getContentPane().getHeight();
 
 String mapS="w "+(paneWidth-cellHeight)+"px!,h "+(paneHeight-cellHeight)+"!";
 String previewS="w "+cellHeight+"px!,h "+cellHeight+"px!";
 String playerS="w "+(paneWidth-cellHeight)+"px!,h "+cellHeight+"px!";
 String multiS="w "+cellHeight+"px!,h "+(paneHeight-cellHeight)+"px!";
 
 // The map's width is the ContentPane width minus one Cell width.
 content.add(mapPanel, "cell 0 0 6 3, "+mapS);
 //The multiPanel is the rest.
 content.add(multiPanel, "cell 6 0 1 3, "+multiS);
 // The PlayerPanels are under the map, all in one row
 content.add(players,"cell 0 3 6 1, "+playerS);
 // The preview panel is a square.
 content.add(cardPanel,"cell 6 3 1 1, "+previewS);
 game.addObserver(this);
 pack();
 players.load();
 if (game.getPlayers().isEmpty()) {
 mapPanel.scrollToField(game.getBoard().getCenter());
 } else if (game.getPhase()==Constants.SETCARD_PLACE_ZAL) {
 Pos lastCard = game.getBoard().getLastPos();
 mapPanel.scrollToField(new Pos(lastCard.getY()*3+1,lastCard.getX()*3+1));
 } else {
 mapPanel.scrollToField(game.getActivePlayer().getPos());
 }
 
 // Center this window on the screen
 setLocationRelativeTo(null);
 // Do not allow resizing as it would make the 3 standardS panels not square
 setResizable(false);
 setVisible(true);
 }
 
 /**
 * Sets up the frame and the content pane.
 */
 private void setUpFrame() {
 // Get the screen size.
 Toolkit toolkit = Toolkit.getDefaultToolkit();
 screen = toolkit.getScreenSize();
 menuBar = new MenuBar();
 setJMenuBar(menuBar);
 // Sets up this frame's ContentPane.
 int paneHeight = (int)(float)(screen.height*paneToScreen);
 int paneWidth = (int)(float)(paneHeight*screen.width/screen.height);
 paneSize = new Dimension(paneWidth,paneHeight);
 content.setSize(paneSize);
 // The height and width that every square component of this has.
 cellHeight = (int)((float)paneHeight/4)/3*3;
 setContentPane(content);
 this.setTitle("Zombie Invasion -- TEST");
 }

 /**
 * Getter for the ScrollPane.
 * @return The JScrollPane containing the map.
 */
 public MapScrollPane getScrollPane() {
 return mapPanel;
 }
 
 /**
 * Getter for the multifunctional panel.
 * @return
 */
 public MultifunctionalPanel getMultiPanel() {
 return multiPanel;
 }
 
 /**
 * Getter for the panel showing the last drawn card.
 * @return
 */
 public CardPreviewPanel getPreviewPanel() {
 return cardPanel;
 }
 
 /**
 * Add a new player to the GUI. Adds a PlayerPanel and a PlayerIcon.
 * @param player The player that gets added.
 */
 public void addPlayer(IPlayer player) {
 if (playerNo<6) {
 players.addPanel(player);
 mapPanel.getMap().addPlayer(player);
 playerNo++;
 pack();
 }
 }
 
 public void update(Observable obs, Object arg) {
 // Notified by game when a player is added.
 if (arg instanceof IPlayer) {
 IPlayer a = (IPlayer)arg;
 addPlayer(a);
 }else if(arg.equals("GAME_WON")){
 Game g = (Game)obs;
 if(g.getWinner()!=null){
 JOptionPane.showMessageDialog(this, g.getWinner().getName()+" wins the game");
 }
 }
 }
 
 public void addMenuActionListener(ActionListener l) {
 /*
 * Since getMenuBar is a method of JPanel (with the wrong MenuBar type),
 * we can not use this getter approach like we did with other Listeners :-(. 
 */
 menuBar.addActionListener(l);
 }
}

JMenu menuFile = new JMenu(Internalization.getMessage().getString("menuFile"));

package controller;

import java.util.Locale;
import java.util.MissingResourceException;
import java.util.ResourceBundle;

import javax.swing.JOptionPane;

public class I18N {
 private static ResourceBundle message;
 
 public I18N(String lang) {
 Locale currentLocale = null;
 if (lang != null)
 currentLocale = new Locale(lang);
 try {
 I18N.message = ResourceBundle.getBundle("controller.MessageBundle", currentLocale);
 } catch (MissingResourceException e) {
 e.printStackTrace();
 JOptionPane.showConfirmDialog(null, "Could not find file!",
 "ERROR", JOptionPane.OK_OPTION, JOptionPane.ERROR_MESSAGE);
 }
 }
 
 public static ResourceBundle getMessage() {
 return I18N.message;
 }

}