Key Event Demo : Key Event « J2ME « Java





Key Event Demo

Key Event Demo
/*
 * @(#)Tiles.java 1.6 00/05/24 Copyright (c) 2000 Sun Microsystems, Inc. All
 * Rights Reserved.
 * 
 * This software is the confidential and proprietary information of Sun
 * Microsystems, Inc. ("Confidential Information"). You shall not disclose such
 * Confidential Information and shall use it only in accordance with the terms
 * of the license agreement you entered into with Sun.
 * 
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
 * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES.
 */

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 Tiles extends MIDlet {

  Board b;

  public Tiles() {
    b = new Board(this);
  }

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

  public void pauseApp() {
  }

  public void destroyApp(boolean unconditional) {
  }

}

/*
 * @(#)Board.java 1.14 00/05/23 Copyright (c) 2000 Sun Microsystems, Inc. All
 * Rights Reserved.
 * 
 * This software is the confidential and proprietary information of Sun
 * Microsystems, Inc. ("Confidential Information"). You shall not disclose such
 * Confidential Information and shall use it only in accordance with the terms
 * of the license agreement you entered into with Sun.
 * 
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
 * SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
 * NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
 * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES.
 */

class Board extends Canvas implements CommandListener {

  MIDlet midlet;

  Command exitCommand;

  Font font;

  // Character Position
  int xPos, yPos;

  // Chracter Height and Width in pixels
  int charW, charH;

  public Board(MIDlet midlet_) {

    int i;

    midlet = midlet_;
    Display dpy = Display.getDisplay(midlet);
    int letterWidth = 4;

    font = Font.getFont(Font.FACE_SYSTEM, Font.STYLE_PLAIN,
        Font.SIZE_MEDIUM);

    charW = font.charWidth('M') + 7;
    charH = font.getHeight() + 1;

    xPos = (getWidth() - (letterWidth * charW) + 1) / 2;
    yPos = 1;

    exitCommand = new Command("Exit", Command.SCREEN, 2);
    addCommand(exitCommand);

    setCommandListener(this);
    repaint();

  }

  public void commandAction(Command c, Displayable d) {
    if (c == exitCommand) {
      midlet.notifyDestroyed();

    }
  }

  public void paint(Graphics g) {
    g.setColor(0);
    g.drawRect(4, 4, 4 * charW + 2, 4 * charH + 2);
  }

  public void keyPressed(int code) {
    int game = getGameAction(code);

    switch (game) {
    case Canvas.UP:
      System.out.println("Canvas.UP");
      break;
    case Canvas.DOWN:
      System.out.println("Canvas.DOWN");
      break;
    case Canvas.LEFT:
      System.out.println("Canvas.LEFT");
      break;
    case Canvas.RIGHT:
      System.out.println("Canvas.RIGHT");
      break;
    }

    switch (code) {

    case Canvas.KEY_NUM0:
      System.out.println("Key 0");
      break;
    case Canvas.KEY_NUM1:
      System.out.println("Key 1");
      break;
    case Canvas.KEY_NUM2:
      System.out.println("Key 2");
      break;
    case Canvas.KEY_NUM3:
      System.out.println("Key 3");
      break;
    case Canvas.KEY_NUM4:
      System.out.println("Key 4");
      break;
    case Canvas.KEY_NUM5:
      System.out.println("Key 5");
      break;
    case Canvas.KEY_NUM6:
      System.out.println("Key 6");
      break;
    case Canvas.KEY_NUM7:
      System.out.println("Key 7");
      break;
    case Canvas.KEY_NUM8:
      System.out.println("Key 8");
      break;
    case Canvas.KEY_NUM9:
      System.out.println("Key 9");
      break;
    case Canvas.KEY_STAR:
      System.out.println("Star Key");
      break;

    case Canvas.KEY_POUND:
      System.out.println("Pound Key");
      break;

    //  default:

    //     System.out.println( "default" );
    //  return;
    }

  }

}


           
       










Related examples in the same category

1.Low-Level Display Canvas:Key Code Example Low-Level Display Canvas:Key Code Example
2.Event Example 1Event Example 1
3.Event Example 2Event Example 2
4.Game Key EventGame Key Event
5.Key MIDletKey MIDlet
6.Key Event with CanvasKey Event with Canvas
7.Canvas for processing key code and commandsCanvas for processing key code and commands
8.Canvas for processing game actionsCanvas for processing game actions