Question

我正在编写一个Java应用程序而且我只是坚持了一点。我想用菜单项语言制作菜单，这显然会通过点击所需语言来改变应用程序的语言。为此，我编写了两个.properties文件：一个名为LabelsBundle（englisch）的默认文件和一个名为LabelsBundle_de（德语）的扩展名。我上过这样的课：

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

import javax.swing.*;

public class MenuBar extends JFrame implements ActionListener 
{
private JMenuBar menuBar;
private JMenu language, about;
private JMenuItem UKLang, DELang, FRLang, ESPLang, POLLang;
private ResourceBundle labels;
private Locale currentLocale;

public  MenuBar()
{
    menuBar = new JMenuBar();
    language = new JMenu("Language");
    about = new JMenu("About");

    UKLang = new JMenuItem("English");
    DELang = new JMenuItem("German");
    FRLang = new JMenuItem("French");
    //ESPLang = new JMenuItem("Spanish");
    POLLang = new JMenuItem("Polish");

    UKLang.addActionListener(this);
    DELang.addActionListener(this);

    language.add(UKLang);
    language.add(DELang);
    language.add(FRLang);
    language.add(POLLang);

    menuBar.add(Box.createVerticalGlue());
    menuBar.add(language);
    menuBar.add(about);

}

public JMenuBar getMenu()
{
    return menuBar;
}

@Override
public void actionPerformed(ActionEvent e) 
{
    Object input = e.getSource();


    if(input == UKLang)
    {
        currentLocale = new Locale("en");
        labels = ResourceBundle.getBundle("LabelsBundle", currentLocale);
    }

    else if(input == DELang)
    {
        currentLocale = new Locale("de");
        labels = ResourceBundle.getBundle("LabelsBundle", currentLocale);
    }

    else if(input == FRLang)
    {
        currentLocale = new Locale("fr");
        labels = ResourceBundle.getBundle("LabelsBundle_fr", currentLocale);
    }

    else if(input == POLLang)
    {
        currentLocale = new Locale("pl");
        labels = ResourceBundle.getBundle("LabelsBundle_pol", currentLocale);
    }

}

}

我不知道接下来该做什么。我的队友告诉我关于

的事

object.setText(resourceBundle.getString("blabla"));

但我真的不知道如何使用这样的东西，例如

resultWaveLabel = new JLabel("Result wave:");

我认为我需要写一些像

这样的东西

resultWaveLabel.setText(...);

我是对的吗？

当我在菜单列表中点击德语时，我收到错误

Exception in thread "AWT-EventQueue-0" java.util.MissingResourceException: Can't find bundle for base name LabelsBundle, locale de

编辑：我想强调的是，主要问题是如何更改上述内容的标签 - 而不是去除提到的错误。这已经解决了。

Answer 1

<强>异常

此输出是预期的，因为项目中没有名为“LabelsBundle”的资源文件或

如果资源文件存在，则会发生同样的情况，但所需的资源不存在。

此外，将此资源文件（称为 LabelsBundle.properties ）和您想要的任何资源放在与ResourceBundle.getBundle("newpackage.LabelsBundle", currentLocale);类相同的目录中。表示java文件和属性文件应位于同一目录中。

如果这个java文件和属性文件在一个包中，你必须提供加载它的完全限定路径

例如，如果属性文件位于名为newpackage的包中，那么您应该加载资源，如

labels

设置标签值

请参阅此link。详情请参阅在将ResourceBundle分配给变量（您的情况为resultWaveLabel.setText(labels.getString("blabla"));）后，只需输入

即可

@Override
public void actionPerformed(ActionEvent e) 
{
    Object input = e.getSource();


    if(input == UKLang)
    {
        currentLocale = new Locale("en");
        labels = ResourceBundle.getBundle("LabelsBundle", currentLocale);
    }

    else if(input == DELang)
    {
        currentLocale = new Locale("de");
        labels = ResourceBundle.getBundle("LabelsBundle", currentLocale);
    }

    else if(input == FRLang)
    {
        currentLocale = new Locale("fr");
        labels = ResourceBundle.getBundle("LabelsBundle_fr", currentLocale);
    }

    else if(input == POLLang)
    {
        currentLocale = new Locale("pl");
        labels = ResourceBundle.getBundle("LabelsBundle_pol", currentLocale);
    }
     //Here you go. the magical code to do that
     resultWaveLabel.setText(labels.getString("blabla"));///Here that's it your label is updated with the text 
}

更准确

   .productImage 
{
    width:150px;
    height:150px;
    vertical-align:central;
    padding:10px;
    border:10px;
    border-radius:50px;
    -moz-border-radius:50px;
    -webkit-border-radius:50px;
    display:block;
    Text-indent: -9999px;


}

Answer 2

作为我自己的问题的回答，在Madhan的帮助下，我的班级现在看起来像这样（声音是其他班级的名字！）：

package GuitarPro;

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

import javax.swing.*;

public class MenuBar extends JFrame implements ActionListener 
{
private JMenuBar menuBar;
private JMenu language, program;
private JMenuItem UKLang, DELang, FRLang, ESPLang, POLLang, RUSLang, about, exit;
private ResourceBundle labels;
private Locale currentLocale;
private String aboutApplication;

public  MenuBar()
{
    menuBar = new JMenuBar();
    language = new JMenu("Language");
    program = new JMenu("Program");

    UKLang = new JMenuItem("English");
    DELang = new JMenuItem("German");
    FRLang = new JMenuItem("French");
    ESPLang = new JMenuItem("Spanish");
    POLLang = new JMenuItem("Polish");
    RUSLang = new JMenuItem("Russian");
    exit = new JMenuItem("Exit");
    about = new JMenuItem("About");

    UKLang.addActionListener(this);
    DELang.addActionListener(this);
    POLLang.addActionListener(this);
    FRLang.addActionListener(this);
    ESPLang.addActionListener(this);
    RUSLang.addActionListener(this);
    about.addActionListener(this);
    exit.addActionListener(this);

    language.add(UKLang);
    language.add(DELang);
    language.add(FRLang);
    language.add(POLLang);
    language.add(ESPLang);
    language.add(RUSLang);

    program.add(about);
    program.add(exit);

    menuBar.add(Box.createVerticalGlue());
    menuBar.add(program);
    menuBar.add(language);

}

public JMenuBar getMenu()
{
    return menuBar;
}

public void setLanguage()
{
    Sounds.amplitudeLabel.setText(labels.getString("amplitude_label"));
    Sounds.frequencyLabel.setText(labels.getString("frequency_label"));
    Sounds.phaseLabel.setText(labels.getString("phase_label"));
    Sounds.componentWavesLabel.setText(labels.getString("component_waves_label"));
    Sounds.resultWaveLabel.setText(labels.getString("result_wave_label"));
    Sounds.play.setText(labels.getString("play_button"));
    Sounds.playTriade.setText(labels.getString("play_triade_button"));
    Sounds.saveImage.setText(labels.getString("save_image_button"));
    Sounds.saveWave.setText(labels.getString("save_sample_button"));
    Sounds.info_message = labels.getString("save_success_message");
    Sounds.err_message = labels.getString("save_error_message");
    Sounds.wave_1 = labels.getString("wave_1");
    Sounds.wave_2 = labels.getString("wave_2");
    Sounds.wave_3 = labels.getString("wave_3");
    aboutApplication = labels.getString("about");
}

@Override
public void actionPerformed(ActionEvent e) 
{
    Object input = e.getSource();


    if(input == UKLang)
    {
        currentLocale = new Locale("en");

        labels = ResourceBundle.getBundle("GuitarPro.LabelsBundle_en", currentLocale);
        setLanguage();
    }

    else if(input == DELang)
    {
        currentLocale = new Locale("de");

        labels = ResourceBundle.getBundle("GuitarPro.LabelsBundle_de", currentLocale);
        setLanguage();
    }

    else if(input == FRLang)
    {
        currentLocale = new Locale("fr");
        labels = ResourceBundle.getBundle("GuitarPro.LabelsBundle_fr", currentLocale);
        setLanguage();
    }

    else if(input == POLLang)
    {
        currentLocale = new Locale("pl");
        labels = ResourceBundle.getBundle("GuitarPro.LabelsBundle_pl", currentLocale);
        setLanguage();
    }

    else if(input == ESPLang)
    {
        currentLocale = new Locale("esp");
        labels = ResourceBundle.getBundle("GuitarPro.LabelsBundle_esp", currentLocale);
        setLanguage();
    }

    else if(input == RUSLang)
    {
        currentLocale = new Locale("rus");
        labels = ResourceBundle.getBundle("GuitarPro.LabelsBundle_rus", currentLocale);
        setLanguage();
    }

    else if(input == about)
        JOptionPane.showMessageDialog(null, aboutApplication);

    else if(input == exit)
        dispose();

}

}

我的一个捆绑资源文件如下所示：

# This is the default LabelsBundle.properties file

amplitude_label = Amplitude
frequency_label = Frequency (Hz)
phase_label = Phase (Degrees)
component_waves_label = Component Waves
result_wave_label = Result Wave
play_button = Play
play_triade_button = Play Triad
save_image_button = Save Image
save_sample_button = Save Sample
save_success_message = File saved successfully
save_error_message = File could not be saved
wave_1 = Wave 1
wave_2 = Wave 2
wave_3 = Wave 3
about = test

要实现这一点，我必须使其他类中的所有对象都是静态的：

public static JLabel amplitudeLabel, frequencyLabel, phaseLabel, componentWavesLabel, resultWaveLabel;
public static JButton play, playTriade, saveImage, saveWave;
public static String info_message = "File saved successfully";
public static String err_message = "File could not be saved";
public static String wave_1 = "Wave 1";
public static String wave_2 = "Wave 2";
public static String wave_3 = "Wave 3";

然后我可以做到我想要的。谢谢，祝你好运！

使用资源包更改标签

2 个答案: