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Unicode Display Problem (Urgent!!!)  RSS feed

 
S Dan
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Posts: 25
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Attached is the code that displays all unicode characters. The code is taken
from David Flanagan's book.
However this doesn�t display multiple East Asian languages at the same time.
Please compile it and run it

1. using �java �Duser.language=ja UnicodeDisplay�
2. using �java �Duser.language=zh UnicodeDisplay�

#1 will show the Japanese characters properly but won�t display the Chinese characters properly.
#2 will do just the reverse.

My question is, is there a way by which I can make this program display both Japanese and Chinese characters (if possible Korean too) at the same time.

By the way, there is a third party java software running on my machine that
displays all east asian languages properly. So I have those languages and fonts installed on my machine and thats definitely not the problem.

Thanks in advance for your help.
-Dan




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

/**
* This program displays Unicode glyphs using user-specified fonts
* and font styles.
**/
public class UnicodeDisplay extends JFrame implements ActionListener {
int page = 0;
UnicodePanel p;
JScrollBar b;
String fontfamily = "Serif";
int fontstyle = Font.PLAIN;

/**
* This constructor creates the frame, menubar, and scrollbar
* that work along with the UnicodePanel class, defined below
**/
public UnicodeDisplay(String name) {
super(name);
p = new UnicodePanel( ); // Create the panel
p.setBase((char)(page * 0x100)); // Initialize it
getContentPane( ).add(p, "Center"); // Center it

// Create and set up a scrollbar, and put it on the right
b = new JScrollBar(Scrollbar.VERTICAL, 0, 1, 0, 0xFF);
b.setUnitIncrement(1);
b.setBlockIncrement(0x10);
b.addAdjustmentListener(new AdjustmentListener( ) {
public void adjustmentValueChanged(AdjustmentEvent e) {
page = e.getValue( );
p.setBase((char)(page * 0x100));
}
});
getContentPane( ).add(b, "East");

// Set things up so we respond to window close requests
this.addWindowListener(new WindowAdapter( ) {
public void windowClosing(WindowEvent e) { System.exit(0); }
});

// Handle Page Up and Page Down and the up and down arrow keys
this.addKeyListener(new KeyAdapter( ) {
public void keyPressed(KeyEvent e) {
int code = e.getKeyCode( );
int oldpage = page;
if ((code == KeyEvent.VK_PAGE_UP) ||
(code == KeyEvent.VK_UP)) {
if (e.isShiftDown( )) page -= 0x10;
else page -= 1;
if (page < 0) page = 0;
}
else if ((code == KeyEvent.VK_PAGE_DOWN) ||
(code == KeyEvent.VK_DOWN)) {
if (e.isShiftDown( )) page += 0x10;
else page += 1;
if (page > 0xff) page = 0xff;
}
if (page != oldpage) { // if anything has changed...
p.setBase((char) (page * 0x100)); // update the display
b.setValue(page); // and update scrollbar to match
}
}
});

// Set up a menu system to change fonts. Use a convenience method.
JMenuBar menubar = new JMenuBar( );
this.setJMenuBar(menubar);
menubar.add(makemenu("Font Family",
new String[ ] {"Serif", "SansSerif", "Monospaced"},
this));
menubar.add(makemenu("Font Style",
new String[ ]{
"Plain","Italic","Bold","BoldItalic"
}, this));
}

/** This method handles the items in the menubars */
public void actionPerformed(ActionEvent e) {
String cmd = e.getActionCommand( );
if (cmd.equals("Serif")) fontfamily = "Serif";
else if (cmd.equals("SansSerif")) fontfamily = "SansSerif";
else if (cmd.equals("Monospaced")) fontfamily = "Monospaced";
else if (cmd.equals("Plain")) fontstyle = Font.PLAIN;
else if (cmd.equals("Italic")) fontstyle = Font.ITALIC;
else if (cmd.equals("Bold")) fontstyle = Font.BOLD;
else if (cmd.equals("BoldItalic")) fontstyle = Font.BOLD + Font.ITALIC;
p.setFont(fontfamily, fontstyle);
}

/** A convenience method to create a Menu from an array of items */
private JMenu makemenu(String name, String[ ] itemnames,
ActionListener listener)
{
JMenu m = new JMenu(name);
for(int i = 0; i < itemnames.length; i++) {
JMenuItem item = new JMenuItem(itemnames[i]);
item.addActionListener(listener);
item.setActionCommand(itemnames[i]); // okay here, though
m.add(item);
}
return m;
}

/** The main( ) program just creates a window, packs it, and shows it */
public static void main(String[ ] args) {
UnicodeDisplay f = new UnicodeDisplay("Unicode Displayer");
f.pack( );
f.show( );
}

/**
* This nested class is the one that displays one "page" of Unicode
* glyphs at a time. Each "page" is 256 characters, arranged into 16
* rows of 16 columns each.
**/
public static class UnicodePanel extends JComponent {
protected char base; // What character we start the display at
protected Font font = new Font("serif", Font.PLAIN, 18);
protected Font headingfont = new Font("monospaced", Font.BOLD, 18);
static final int lineheight = 25;
static final int charspacing = 20;
static final int x0 = 65;
static final int y0 = 40;

/** Specify where to begin displaying, and redisplay */
public void setBase(char base) { this.base = base; repaint( ); }

/** Set a new font name or style, and redisplay */
public void setFont(String family, int style) {
this.font = new Font(family, style, 18);
repaint( );
}

/**
* The paintComponent( ) method actually draws the page of glyphs
**/
public void paintComponent(Graphics g) {
int start = (int)base & 0xFFF0; // Start on a 16-character boundary

// Draw the headings in a special font
g.setFont(headingfont);

// Draw 0..F on top
for(int i=0; i < 16; i++) {
String s = Integer.toString(i, 16);
g.drawString(s, x0 + i*charspacing, y0-20);
}

// Draw column down left.
for(int i = 0; i < 16; i++) {
int j = start + i*16;
String s = Integer.toString(j, 16);
g.drawString(s, 10, y0+i*lineheight);
}

// Now draw the characters
g.setFont(font);
char[ ] c = new char[1];
for(int i = 0; i < 16; i++) {
for(int j = 0; j < 16; j++) {
c[0] = (char)(start + j*16 + i);
g.drawChars(c, 0, 1, x0 + i*charspacing, y0+j*lineheight);
}
}
}

/** Custom components like this one should always have this method */
public Dimension getPreferredSize( ) {
return new Dimension(x0 + 16*charspacing,
y0 + 16*lineheight);
}
}
}
 
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