game.java

j2me 编 写 的 一 个 小 游 戏！ 适 合 初 学 者学 习

import java.util.Random;

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.Form;
import javax.microedition.lcdui.Gauge;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Ticker;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

public class game extends MIDlet implements Runnable, CommandListener {

	canvas mc = null;
	private Display dis;
	private Form frm = null;
	private Gauge gauge = null;
	private Command cmdExit = new Command("Exit", Command.EXIT, 1);

	public game() {
		dis = null;
		frm = new Form("");
		mc = new canvas();
		gauge = new Gauge("Loading.....", false, 50, 0);
	}

	protected void startApp() throws MIDletStateChangeException {

		dis = Display.getDisplay(this);

		dis.setCurrent(frm);
		frm.append(gauge);
		frm.addCommand(cmdExit);
		Thread t = new Thread(this);
		t.start();

		mc.setTicker(new Ticker("数字游戏  按中得一分 按错扣一分"));

	}

	public void commandAction(Command c, Displayable d) {
		if (c == cmdExit) {
			try {
				destroyApp(false);
			} catch (MIDletStateChangeException e) {
				e.printStackTrace();
			}
			this.notifyDestroyed();
		}
	}

	public void run() {
		int max = gauge.getMaxValue();
		int i = gauge.getValue();
		while (i < max) {
			gauge.setValue(++i);
			try {
				Thread.sleep(100);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			if (i == max) {
				dis.setCurrent(mc);
			}
		}
	}

	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {

	}

	protected void pauseApp() {

	}
}

class canvas extends Canvas implements Runnable, CommandListener {

	private char randomnumber, num1;
	private Random r1;
	String num;
	private boolean GameState;
	private boolean win, over;
	private Command cmdNew, cmdPause;
	Thread th = null;
	private int n = 5;

	public canvas() {

		win = false;
		over = false;
		GameState = false;
		r1 = new Random();
		cmdNew = new Command("Start", Command.SCREEN, 1);
		cmdPause = new Command("Pause", Command.BACK, 1);
		this.addCommand(cmdNew);
		this.addCommand(cmdPause);
		
		
		this.setCommandListener(this);
	}

	public void gamerun() {
		if (randomnumber == num1) {
			n++;
			if (n == 15) {
				win = true;
			}
		} else {
			n--;
			if (n <= 0) {
				over = true;
			}
		}
		
		
	}

	public void commandAction(Command c, Displayable d) {

		if (c == cmdNew) {
			win = false;
			over = false;
			if (th == null) {

				GameState = true;
				th = new Thread(this);
				th.start();
			}
			
		}

		else if (c == cmdPause) {
			GameState = false;
			th = null;
		}
	}

	public void paint(Graphics g) {
		g.setColor(255, 255, 255);
		g.fillRect(0, 0, this.getWidth(), this.getHeight());
		Font font = Font.getFont(Font.FACE_MONOSPACE, Font.STYLE_BOLD,
				Font.SIZE_LARGE);
		g.setFont(font);

		g.setColor(r1.nextInt(255), r1.nextInt(255), r1.nextInt(255));

		if (win) {
			g.drawString("You Win", this.getWidth() / 2, this.getHeight() / 2, 0);
			GameState = false;
			th = null;
			n = 5;
		} else if (over) {
			g.drawString("Game Over", this.getWidth() / 2,
					this.getHeight() / 2, 0);
			GameState = false;
			th = null;
			n = 5;
		} else{
			String str=Integer.toString(n);
			this.setTitle("The points:"+str);
			g.drawChar(randomnumber, r1.nextInt(this.getWidth() - 10), r1
					.nextInt(this.getHeight() - 10), 0);
			}
	}

	protected void keyPressed(int keyCode) {
		num = Integer.toString(keyCode - 48);
		num1 = num.charAt(0);
		gamerun();
	}

	public void run() {
		while (GameState) {
			int number = r1.nextInt(10) + 48;
			randomnumber = (char) number;
			repaint();
			try {
				Thread.sleep(550);
			} catch (Exception e) {
				e.printStackTrace();
			}

		}
	}
}