import javax.microedition.midlet.MIDlet;import javax.microedition.lcdui.*; //简单的canvas by sword2008@程序之巢 public class test2 extends MIDlet{ private Display display;  public test2(){  display=Display.getDisplay(this); }  public void startApp(){  display.setCurrent(new test());}  public void pauseApp(){ }  public void destroyApp(boolean unkowmn){ }   class test extends Canvas{ public void paint(Graphics g){  g.setColor(255,255,0);  g.fillRect(0,0,getWidth(),getHeight());  int c=g.getColor();  int d=g.getDisplayColor(g.getColor());  System.out.println("当前画面的颜色为："+Integer.toHexString(c));        System.out.println("当前画面的R值为："+g.getRedComponent());        System.out.println("当前画面的G值为："+g.getGreenComponent());        System.out.println("当前画面的B值为："+g.getBlueComponent());        System.out.println("当前画面的显示颜色为："+Integer.toHexString(d));         System.out.println("当前画面的灰度为："+g.getGrayScale());   } }}

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