Font style : Font « J2ME « Java Tutorial

1. Java Tutorial
2. J2ME
3. Font

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
import javax.microedition.midlet.MIDlet;

public class FontMIDlet extends MIDlet implements CommandListener {
  private FontCanvas mFontCanvas;

  private Command mBoldCommand, mItalicCommand, mUnderlineCommand;

  public FontMIDlet() {
    mFontCanvas = new FontCanvas();

    mBoldCommand = new Command("Bold", Command.SCREEN, 0);
    mItalicCommand = new Command("Italic", Command.SCREEN, 0);
    mUnderlineCommand = new Command("Underline", Command.SCREEN, 0);
    Command exitCommand = new Command("Exit", Command.EXIT, 0);

    mFontCanvas.addCommand(mBoldCommand);
    mFontCanvas.addCommand(mItalicCommand);
    mFontCanvas.addCommand(mUnderlineCommand);
    mFontCanvas.addCommand(exitCommand);
    mFontCanvas.setCommandListener(this);
  }

  public void startApp() {
    Display.getDisplay(this).setCurrent(mFontCanvas);
  }

  public void pauseApp() {
  }

  public void destroyApp(boolean unconditional) {
  }

  public void commandAction(Command c, Displayable s) {
    if (c.getCommandType() == Command.EXIT) {
      notifyDestroyed();
      return;
    }

    boolean isBold = mFontCanvas.isBold() ^ (c == mBoldCommand);
    boolean isItalic = mFontCanvas.isItalic() ^ (c == mItalicCommand);
    boolean isUnderline = mFontCanvas.isUnderline() ^ (c == mUnderlineCommand);

    int style = (isBold ? Font.STYLE_BOLD : 0) | (isItalic ? Font.STYLE_ITALIC : 0)
        | (isUnderline ? Font.STYLE_UNDERLINED : 0);

    mFontCanvas.setStyle(style);
    mFontCanvas.repaint();
  }
}

class FontCanvas extends Canvas {
  private Font mSystemFont, mMonospaceFont, mProportionalFont;

  public FontCanvas() {
    this(Font.STYLE_PLAIN);
  }

  public FontCanvas(int style) {
    setStyle(style);
  }

  public void setStyle(int style) {
    mSystemFont = Font.getFont(Font.FACE_SYSTEM, style, Font.SIZE_MEDIUM);
    mMonospaceFont = Font.getFont(Font.FACE_MONOSPACE, style, Font.SIZE_MEDIUM);
    mProportionalFont = Font.getFont(Font.FACE_PROPORTIONAL, style, Font.SIZE_MEDIUM);
  }

  public boolean isBold() {
    return mSystemFont.isBold();
  }

  public boolean isItalic() {
    return mSystemFont.isItalic();
  }

  public boolean isUnderline() {
    return mSystemFont.isUnderlined();
  }

  public void paint(Graphics g) {
    int w = getWidth();
    int h = getHeight();

    int x = w / 2;
    int y = 20;

    y += showFont(g, "System", x, y, mSystemFont);
    y += showFont(g, "Monospace", x, y, mMonospaceFont);
    y += showFont(g, "Proportional", x, y, mProportionalFont);
  }

  private int showFont(Graphics g, String s, int x, int y, Font f) {
    g.setFont(f);
    g.drawString(s, x, y, Graphics.TOP | Graphics.HCENTER);
    return f.getHeight();
  }
}

31.30.Font
	31.30.1.	Get font width
	31.30.2.	Font style
	31.30.3.	System Font
	31.30.4.	Medium Sized font
	31.30.5.	Bold Style Font
	31.30.6.	Italic Style Font
	31.30.7.	Underlined Style Font
	31.30.8.	Get width and height