helloworld.java

基于j2me实现的HelloWorld

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Graphics;

public class HelloWorld extends Canvas implements Runnable {
	Main _midlet;

	public HelloWorld(Main midlet) {
		// TODO Auto-generated constructor stub
		_midlet = midlet;
		s_bRunning = true;
		_midlet.dis.setCurrent(this);
		setFullScreenMode(true);
		Thread mainThread = new Thread(this);
		mainThread.start();
	}

	static Graphics s_g;

	protected void paint(Graphics g) {
		// TODO Auto-generated method stub
		s_g = g;
		if (!s_bEnterWorld) {
			s_bEnterWorld = true;
			s_g.setColor(0xFF00FF00);
			s_g.fillRect(0, 0, this.getWidth(), this.getHeight());
			s_g.setColor(0xFFFF0000);
			s_g.drawString("Hello World", this.getWidth() >> 1, this
					.getHeight() >> 1, Graphics.TOP | Graphics.LEFT);
		}
	}

	public void run() {
		// TODO Auto-generated method stub
		while (s_bRunning) {
			repaint();
			serviceRepaints();
			try {
				Thread.sleep(100);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}

	static boolean s_bRunning = false;
	boolean s_bEnterWorld = false;
}