Java Tutorial/J2ME
- Alert
- Arc
- Audio Capture
- Audio Player
- Canvas
- CheckBox
- ChoiceGroup
- Clip
- Color
- Command
- CommandListener
- Connector
- Cookie
- Coordinates
- CustomItem
- Datagram
- DateField
- Display
- Draw String
- File Stream
- Form
- Gauge
- Graphics
- HttpConnection
- Image
- ImageItem
- ItemStateListener
- Key Event
- Line
- List
- MIDI
- MIDlet
- Media Manager
- OutputConnection
- PIM
- PNG
- RadioButton
- RecordListener
- RecordStore
- Rectangle
- Screen Buffer
- ServerSocketConnection
- Servlet Invoke
- StopTimeControl
- Stream Media
- StreamConnection
- StringItem
- TextBox
- Thread
- Ticker
- Timer
- TimerTask
- ToneControl
- Tones
- Video
- VideoControl
- m3g
- mp3
- wav
Содержание
Bold Style Font
<source lang="java">
import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Font; import javax.microedition.lcdui.Graphics; import javax.microedition.midlet.MIDlet; public class BoldFontMidlet extends MIDlet {
public BoldFontMidlet() { // constructor } public void startApp() { Canvas canvas = new FontCanvas(); Display display = Display.getDisplay(this); display.setCurrent(canvas); } public void pauseApp() { } public void destroyApp(boolean unconditional) { }
} class FontCanvas extends Canvas {
public void paint(Graphics g) { g.setColor(0xffffff); g.fillRect(0, 0, getWidth(), getHeight()); g.setColor(0x000000); g.setFont(Font.getFont(Font.FACE_SYSTEM, Font.STYLE_BOLD, Font.SIZE_MEDIUM)); g.drawString("Bold Style", 0, 30, g.LEFT | g.TOP); }
}</source>
Font style
<source lang="java">
import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; 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(); }
}</source>
Get font width
<source lang="java">
import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Font; import javax.microedition.lcdui.Graphics; import javax.microedition.midlet.MIDlet; public class FontWidthGraphicsMIDlet extends MIDlet {
private Display display; protected void startApp() { Canvas canvas = new LineCanvas(); display = Display.getDisplay(this); display.setCurrent(canvas); } protected void pauseApp() { } protected void destroyApp(boolean unconditional) { }
} class LineCanvas extends Canvas {
public void paint(Graphics g) { int width = getWidth(); int height = getHeight(); g.setColor(0); g.setStrokeStyle(Graphics.SOLID); Font font = g.getFont(); int x = font.stringWidth("asdf"); g.setColor(0x00ff00); g.setFont(Font.getFont(Font.FACE_PROPORTIONAL, Font.STYLE_BOLD | Font.STYLE_ITALIC, Font.SIZE_MEDIUM)); g.drawString("and multi-color", x, height/2, Graphics.LEFT | Graphics.BASELINE); }
}</source>
Get width and height
<source lang="java">
import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; 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 FontDimensionMIDlet extends MIDlet implements CommandListener {
private Command exitCommand= new Command("Exit", Command.EXIT, 1); Display display; public void startApp() { Display display = Display.getDisplay(this); Displayable d = new FontDimensionCanvas(); d.addCommand(exitCommand); d.setCommandListener(this); display.setCurrent(d); } public void pauseApp() { } public void destroyApp(boolean unconditional) { } public void commandAction(Command c, Displayable s) { notifyDestroyed(); }
} class FontDimensionCanvas extends Canvas {
int width; int height; private Font aFont; public FontDimensionCanvas() { aFont = Font.getFont(Font.FACE_PROPORTIONAL, Font.STYLE_PLAIN, Font.SIZE_LARGE); } public void paint(Graphics g) { width = getWidth(); height = getHeight(); String s = "TEXT"; int stringWidth = aFont.stringWidth(s); int stringHeight = aFont.getHeight(); g.setGrayScale(255); g.fillRect(0, 0, width - 1, height - 1); g.setGrayScale(0); g.drawRect(0, 0, width - 1, height - 1); g.setFont(aFont); g.drawString(s, 10, 10, Graphics.TOP | Graphics.LEFT); g.drawRect(10, 10, stringWidth, stringHeight); }
}</source>
Italic Style Font
<source lang="java">
import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Font; import javax.microedition.lcdui.Graphics; import javax.microedition.midlet.MIDlet; public class ItalicFontMidlet extends MIDlet {
public ItalicFontMidlet() { // constructor } public void startApp() { Canvas canvas = new FontCanvas(); Display display = Display.getDisplay(this); display.setCurrent(canvas); } public void pauseApp() { } public void destroyApp(boolean unconditional) { }
} class FontCanvas extends Canvas {
public void paint(Graphics g) { g.setColor(0xffffff); g.fillRect(0, 0, getWidth(), getHeight()); g.setColor(0x000000); g.setFont(Font.getFont(Font.FACE_SYSTEM, Font.STYLE_ITALIC, Font.SIZE_MEDIUM)); g.drawString("Italic Style", 0, 45, g.LEFT | g.TOP); }
}</source>
Medium Sized font
<source lang="java">
import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Font; import javax.microedition.lcdui.Graphics; import javax.microedition.midlet.MIDlet; public class MediumFontMidlet extends MIDlet {
public MediumFontMidlet() { // constructor } public void startApp() { Canvas canvas = new FontCanvas(); Display display = Display.getDisplay(this); display.setCurrent(canvas); } public void pauseApp() { } public void destroyApp(boolean unconditional) { }
} class FontCanvas extends Canvas {
public void paint(Graphics g) { g.setColor(0xffffff); g.fillRect(0, 0, getWidth(), getHeight()); g.setColor(0x000000); g.setFont(Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN, Font.SIZE_MEDIUM)); g.drawString("Medium Size", 0, 15, g.LEFT | g.TOP); }
}</source>
System Font
<source lang="java">
import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Font; import javax.microedition.lcdui.Graphics; import javax.microedition.midlet.MIDlet; public class SystemFontMidlet extends MIDlet {
public SystemFontMidlet() { // constructor } public void startApp() { Canvas canvas = new FontCanvas(); Display display = Display.getDisplay(this); display.setCurrent(canvas); } public void pauseApp() { } public void destroyApp(boolean unconditional) { }
} class FontCanvas extends Canvas {
public void paint(Graphics g) { g.setColor(0xffffff); g.fillRect(0, 0, getWidth(), getHeight()); g.setColor(0x000000); g.setFont(Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN, Font.SIZE_LARGE)); g.drawString("System Font", 0, 0, g.LEFT | g.TOP); }
}</source>
Underlined Style Font
<source lang="java">
import javax.microedition.lcdui.Canvas; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Font; import javax.microedition.lcdui.Graphics; import javax.microedition.midlet.MIDlet; public class UnderlineFontMidlet extends MIDlet {
public UnderlineFontMidlet() { // constructor } public void startApp() { Canvas canvas = new FontCanvas(); Display display = Display.getDisplay(this); display.setCurrent(canvas); } public void pauseApp() { } public void destroyApp(boolean unconditional) { }
} class FontCanvas extends Canvas {
public void paint(Graphics g) { g.setColor(0xffffff); g.fillRect(0, 0, getWidth(), getHeight()); g.setColor(0x000000); g.setFont(Font.getFont(Font.FACE_SYSTEM, Font.STYLE_UNDERLINED, Font.SIZE_MEDIUM)); g.drawString("Underlined Style", 0, 60, g.LEFT | g.TOP); }
}</source>