?? filltest.java
字號:
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class FillTest
{
public static void main(String[] args)
{
FillFrame frame=new FillFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
/**
A frame that contains a panel with drawings
*/
class FillFrame extends JFrame
{
public FillFrame()
{
setTitle("FillTest");
setSize(DEFAULT_WIDTH,DEFAULT_HEIGHT);
//add panel to frame
FillPanel panel=new FillPanel();
add(panel);
}
public static final int DEFAULT_WIDTH=400;
public static final int DEFAULT_HEIGHT=400;
}
/**
A panel that displays filled rectangles and ellipses
*/
class FillPanel extends JPanel
{
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2=(Graphics2D) g;
//draw a rectangle
double leftX=100;
double topY=100;
double width=200;
double height=150;
Rectangle2D rect=new Rectangle2D.Double(leftX,topY,width,height);
g2.setPaint(Color.RED);
g2.fill(rect);
//draw the enclosed ellipse
Ellipse2D ellipse=new Ellipse2D.Double();
ellipse.setFrame(rect);
g2.setPaint(new Color(0,128,128));//a dull blu-green
g2.fill(ellipse);
}
}
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