}
class FillFrame extends JFrame
{
public FillFrame()
{
setTitle("FillTest");
setSize(400,400);
// add panel to frame
DrawPanel panel = new DrawPanel();
add(panel);
}
}
class DrawPanel extends JPanel implements Runnable
{
private Thread t;
private int k=0;
public DrawPanel(){
setBackground(Color.white);
t = new Thread(this);
t.start();
}
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
double xCenter=getWidth()/2;//中心点x
double yCenter=getHeight()/2;//中心点y
double radius=(int)(getWidth()*0.4);//半径
Ellipse2D circle = new Ellipse2D.Double(xCenter-radius,yCenter-radius,2*radius,2*radius); g2.draw(circle);
//画一个风车
for(int i=0;i<4;i++)
{
Arc2D arc1=new Arc2D.Double(xCenter-radius,yCenter-radius,2*radius,2*radius,-30+90*i+30*k,30,Arc2D.PIE);
g2.setPaint(Color.RED);