ocanvas.java

绘制奥运五环的j2me小程序

import javax.microedition.lcdui.*;

public class OCanvas extends Canvas
{
	private Display display;
	
	public OCanvas(Display d)
	{
		super();
		display=d;	
	}
	
	void start()
	{
		display.setCurrent(this);
		repaint();	
	}
	
	public void paint(Graphics g)
	{
		//清除显示屏很重要
		g.setColor(255,255,255);//设置白色（根据自己背景的情况选择清屏幕的颜色）
		g.fillRect(0,0,getWidth(),getHeight());//用上面设置的颜色填充屏幕这个矩形
		
		//当指定相等的宽度和高度，并且旋转角度为0到360度的时候，所有的狐形被绘制为完整的圆
		g.setColor(0,0,255);//蓝环
		g.drawArc(5,5,25,25,0,360);
		g.setColor(0,0,0);//黑环
		g.drawArc(35,5,25,25,0,360);
		g.setColor(255,0,0);//红环
		g.drawArc(65,5,25,25,0,360);
		
		//第二排的环
		g.setColor(255,255,0);//黄环
		g.drawArc(20,20,25,25,0,360);
		g.setColor(0,255,0);//绿环
		g.drawArc(50,20,25,25,0,360);
	}
}