?? drawtest.java.bak
字號:
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class DrawTest
{
public static void main(String[] args)
{
DrawFrame frame=new DrawFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
}
class DrawFrame extends JFrame{
public DrawFrame()
{
setTitle("DrawTest!");
setSize(DEFAULT_WIDTH,DEFAULT_HEIGHT);
DrawPanel panel=new DrawPanel();
add(panel);
}
public static final int DEFAULT_WIDTH=400;
public static final int DEFAULT_HEIGHT=400;
}
class DrawPanel extends JPanel
{
public void paintComponent(Graphics g)
{
super.paintComponent(g);
Graphics2D g2=(Graphics2D) g;
double leftX=100;
double topY=100;
double width=200;
double height=150;
Rectangle2D rect=new Rectangle2D.Double(leftX,topY,width,height);
g2.draw(rect);
Ellipse2D ellipse=new Ellipse2D.Double();
ellipse.setFrame(rect);
g2.draw(ellipse);
g2.draw(new Line2D.Double(leftX,topY,leftX,+width,topY+height));
double centerX=rect.getCenterX();
double centerY=rect.getCenterY();
double radius=150;
Ellipse2D circle=new Ellipse2D.Double();
circle.setFrameFromCenter(centerX,centerY,centerX+radius,centerY+radius);
g2.draw(circle);
}
}
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