public void keyPressed(int keyCode)
      　　{
         　　gameaction=getGameAction(keyCode);
         　　switch(gameaction)
         　　{
            　　//按左、右键选择线条状态
            　　case LEFT:
                 　　changeSD=1;
                 　　break;
            　　case RIGHT:
                 　　changeSD=3;
                 　　break;
            　　//按上、下键选择是否填充形状
            　　case UP:
                 　　changeFull=0;
                 　　break;
            　　case DOWN:
                 　　changeFull=1;
                 　　break;
         　　}
         　　repaint();
      　　}
      　　public void paint(Graphics g)
      　　{
         　　//设置绘制颜色
         　　g.setColor(0xffffff);
         　　//绘制一个手机全屏幕填充颜色的矩形
         　　g.fillRect(0,0,getWidth(),getHeight());
         　　//设置下列显示画面的颜色
         　　g.setColor(0);
         　　//选择要显示图形是实线(DOLID)或虚线(DOTTED)
         　　if(changeSD==1)
            　　g.setStrokeStyle(Graphics.SOLID);
         　　else
            　　g.setStrokeStyle(Graphics.DOTTED);
         　　//选择要绘制的种类
         　　if(viewType==0)
         　　{
            　　g.drawString("绘制线条", getWidth()/2, 5, Graphics.HCENTER

　　Graphics.TOP);
            　　//绘制一条直线

g.drawLine(getWidth()/4,100,3×getWidth()/4,100);
         　　}
          　　else if(viewType==1){
            　　g.drawString("绘制矩形", getWidth()/2, 5, Graphics.HCENTER

　　Graphics.TOP);
            　　if(changeFull==0)
               　　//绘制一个矩形
               　　g.drawRect(getWidth()/4,100,getWidth()/2,40);
            　　else
               　　//绘制一个填充的矩形
               　　g.fillRect(getWidth()/4,100,getWidth()/2,40);
         　　}
          　　else if(viewType==2){
            　　g.drawString("绘制圆角矩形", getWidth()/2, 5, Graphics.HCENTER

　　Graphics.TOP);
            　　if(changeFull==0)
              　　//绘制一个圆角矩形
              　　g.drawRoundRect(getWidth()/4,100,getWidth()/2,40,30,40);
            　　else
              　　//绘制一个圆角填充矩形
              　　g.fillRoundRect(getWidth()/4,100,getWidth()/2,40,30,40);
         　　}
          　　else if(viewType==3){
            　　g.drawString("绘制弧形", getWidth()/2, 5, Graphics.HCENTER

　　Graphics.TOP);
            　　if(changeFull==0)
              　　//绘制一个弧形形状
              　　g.drawArc(getWidth()/3,100,40,50,0,150);
            　　else
              　　//绘制一个填充的弧形形状
              　　g.fillArc(getWidth()/3,100,40,50,0,150);
         　　}
          　　else {
　　　　　　　　//绘制一个填充三角形形状
            　　g.drawString("绘制三角形", getWidth()/2, 5, Graphics.HCENTER

　　Graphics.TOP);
            　　g.fillTriangle(50,80,80,60,100,120);
         　　}
         　　//依照选择的线条状况
         　　if(viewType!=4)
         　　{
            　　g.drawString("实线", getWidth()/4, 50, Graphics.HCENTER

raphics.TOP);
            　　g.drawString("虚线", 3×getWidth()/4, 50, Graphics.HCENTER

Graphics.TOP);
            　　g.drawImage(handImage, changeSD×getWidth()/4, 60, Graphics.HCENTER

　　Graphics.TOP);
         　　}