pacer.java

j2me学习 简单例子

package example.demoprimaryui.graphicsone;

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

public class Pacer extends Canvas {

	/**
	 * <p>Pacer的构造函数</p>
	 */
	public Pacer() {

	}

	/**
	 * <p>绘制方法</p>
	 * @see javax.microedition.midlet.Canvas#paint()
	 */
	protected void paint(Graphics g) {
		int w = getWidth();
		int h = getHeight();
		
		g.setColor(0xffffff);
	    g.fillRect(0, 0, w, h);
	    g.setColor(0x000000);

	    for (int x = 0; x < w; x += 10) 
	      g.drawLine(0, w - x, x, 0);
	    
	    int z = 50;
	    g.drawRect(z, z, 20, 20);
	    z += 20; 
	    g.fillRoundRect(z, z, 20, 20, 5, 5);
	    z += 20;
	    g.drawArc(z, z, 20, 20, 0, 360); 
	 } 
	
	/**
	 * <p>清屏方法,进行画面的初始化</p>
	 * 
	 */
	public void clear(Graphics g)
	{
		//把屏幕清成白色
		g.setColor(255,255,255);
		g.fillRect(0,0,getWidth(),getHeight());
	}

}