Java編程語言是第一個被設(shè)計成為全面支持國際化的語言，從一開始，他就具備進(jìn)行有效的國際化所必須的一個特性：使用Unicode來處理所有字符串。支持Unicode使得在Java編程語言下，編寫程序來操作多種語言的字符串變得非常的方便。如今NetBeans的出現(xiàn)再次幫我們減輕了國際化的工作量真是太棒了！
好了回歸正題，接著上次的國際化話題，上次只是演示了NetBeans中一些國際化功能，這次講講其它的功能，首先看看下面的幾幅圖
大家可以看到在不同的DesignLocale里可以有不同的視圖這樣很方便，你可以在自己熟悉的語言環(huán)境下先寫好自己的程序，然后在進(jìn)行國際化，前提是你要先添加自己的locale，或者添加你想要國際化為另一種的語言具體可以看我的上一篇文章
NetBeans國際化功能（一）
還有就是如果你只是想讓自己的應(yīng)用程序只顯示一種語言可以不用改操作系統(tǒng)的語言，，在main的第一句加個Locale.setDefault("這里填寫你想要的語言");以后程序運行的就是你設(shè)置的語言了（本人不建議這樣做）。看下面的截圖，可以有好多的選擇
國際化，并不是僅僅將界面進(jìn)行翻譯一下就可以了，還要考慮到時間的國際化，以及數(shù)值表的國際化等等。下圖顯示了國際化的一些選項，你可以關(guān)閉或者打開國際化功能。
今天先講數(shù)值的國際化：
關(guān)于不同地區(qū)的數(shù)值表示的國際化請看下面的代碼
import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.util.*;
import javax.swing.*;
/**
*
* @author Administrator
*/
public class NumberFormatTest {
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
JFrame frame = new NumberFormatFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
class NumberFormatFrame extends JFrame {
public NumberFormatFrame() {
setTitle("NumberFormatTest");
setLayout(new GridBagLayout());
//定義一個事件監(jiān)聽器
ActionListener listener = new ActionListener() {
public void actionPerformed(ActionEvent e) {
updateDisplay();
}
};
JPanel p = new JPanel();
addRadioButton(p, numberRadioButton, rbGroup, listener);
addRadioButton(p, currencyRadioButton, rbGroup, listener);
addRadioButton(p, percentRadioButton, rbGroup, listener);
add(new JLabel("Local:"), new GBC(0, 0).setAnchor(GBC.EAST));
add(p, new GBC(1, 1));
add(parseButton, new GBC(0, 2).setInsets(2));
add(localeCombo, new GBC(1, 0).setAnchor(GBC.WEST));
add(numberText, new GBC(1, 2).setFill(GBC.HORIZONTAL));
//取得可以使用的locale，比顯示它們的名字
locales = NumberFormat.getAvailableLocales();
for(Locale loc : locales)
localeCombo.addItem(loc.getDisplayName());
localeCombo.setSelectedItem(Locale.getDefault().getDisplayName());
currentNumber = 123456.78;
updateDisplay();
localeCombo.addActionListener(listener);
parseButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
String s = numberText.getText().trim();
try {
Number n = currentNumberFormat.parse(s);
if (n != null) {
currentNumber = n.doubleValue();
updateDisplay();
} else {
numberText.setText("Parse error" + s);
}
} catch (ParseException e) {
numberText.setText("Parse error" + s);
}
}
});
pack();
}
private void addRadioButton(Container p,JRadioButton b,ButtonGroup g,ActionListener listener) {
b.setSelected(g.getButtonCount()==0);
b.addActionListener(listener);
g.add(b);
p.add(b);
}
//更新視圖
public void updateDisplay(){
Locale currentLocale = locales[localeCombo.getSelectedIndex()];
currentNumberFormat =null;
if(numberRadioButton.isSelected())
currentNumberFormat = NumberFormat.getNumberInstance(currentLocale);
else if(currencyRadioButton.isSelected())
currentNumberFormat = NumberFormat.getCurrencyInstance(currentLocale);
else if(percentRadioButton.isSelected())
currentNumberFormat = NumberFormat.getPercentInstance(currentLocale);
String n = currentNumberFormat.format(currentNumber);
numberText.setText(n);
}
private Locale[] locales;
private double currentNumber;
private JComboBox localeCombo = new JComboBox();
private JButton parseButton = new JButton("Parse");
private JTextField numberText = new JTextField(30);
private JRadioButton numberRadioButton = new JRadioButton("Number");
private JRadioButton currencyRadioButton = new JRadioButton("Current");
private JRadioButton percentRadioButton = new JRadioButton("Percent");
private ButtonGroup rbGroup = new ButtonGroup();
private NumberFormat currentNumberFormat;
}
還有個用到的GBC.java代碼
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package testapp.Local;
/*
GBC - A convenience class to tame the GridBagLayout
Copyright (C) 2002 Cay S. Horstmann (http://horstmann.com)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
import java.awt.*;
/**
This class simplifies the use of the GridBagConstraints
class.
*/
public class GBC extends GridBagConstraints
{
/**
Constructs a GBC with a given gridx and gridy position and
all other grid bag constraint values set to the default.
@param gridx the gridx position
@param gridy the gridy position
*/
public GBC(int gridx, int gridy)
{
this.gridx = gridx;
this.gridy = gridy;
}
/**
Constructs a GBC with given gridx, gridy, gridwidth, gridheight
and all other grid bag constraint values set to the default.
@param gridx the gridx position
@param gridy the gridy position
@param gridwidth the cell span in x-direction
@param gridheight the cell span in y-direction
*/
public GBC(int gridx, int gridy, int gridwidth, int gridheight)
{
this.gridx = gridx;
this.gridy = gridy;
this.gridwidth = gridwidth;
this.gridheight = gridheight;
}
/**
Sets the anchor.
@param anchor the anchor value
@return this object for further modification
*/
public GBC setAnchor(int anchor)
{
this.anchor = anchor;
return this;
}
/**
Sets the fill direction.
@param fill the fill direction
@return this object for further modification
*/
public GBC setFill(int fill)
{
this.fill = fill;
return this;
}
/**
Sets the cell weights.
@param weightx the cell weight in x-direction
@param weighty the cell weight in y-direction
@return this object for further modification
*/
public GBC setWeight(double weightx, double weighty)
{
this.weightx = weightx;
this.weighty = weighty;
return this;
}
/**
Sets the insets of this cell.
@param distance the spacing to use in all directions
@return this object for further modification
*/
public GBC setInsets(int distance)
{
this.insets = new Insets(distance, distance, distance, distance);
return this;
}
/**
Sets the insets of this cell.
@param top the spacing to use on top
@param left the spacing to use to the left
@param bottom the spacing to use on the bottom
@param right the spacing to use to the right
@return this object for further modification
*/
public GBC setInsets(int top, int left, int bottom, int right)
{
this.insets = new Insets(top, left, bottom, right);
return this;
}
/**
Sets the internal padding
@param ipadx the internal padding in x-direction
@param ipady the internal padding in y-direction
@return this object for further modification
*/
public GBC setIpad(int ipadx, int ipady)
{
this.ipadx = ipadx;
this.ipady = ipady;
return this;
}
}
關(guān)于日期和時間的國際化下次有空再寫了，最近想翻譯SwingApplicationFramework的API，順便學(xué)習(xí)一下英語。