/**
3.5 Swing contains the class JColorChooser that allows
interactive color selections through a dialog box.
Modify the program in Exercise 3.2 to allow the
selection of drawing colors using the JColorChooser
class. */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.geom.*;
public class Ex2 extends JApplet {
public static void main(String s[]) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JApplet applet = new Ex2();
applet.init();
frame.getContentPane().add(applet);
frame.pack();
frame.setVisible(true);
}
public void init() {
JPanel panel = new Ex2Panel();
getContentPane().add(panel);
}
}
class Ex2Panel extends JPanel{
public Ex2Panel() {
setPreferredSize(new Dimension(400, 400));
setBackground(Color.white);
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
int w = this.getWidth();
int h = this.getHeight();
int r = Math.min(w, h) - 100;
Area a = new Area(new Rectangle(r, r));
a.subtract(new Area(new Ellipse2D.Double(r/4, r/4, r/2, r/2)));
g2.translate((w-r)/2, (h-r)/2);
g2.setColor(Color.green);
g2.fill(a);
g2.setColor(Color.black);
g2.draw(a);
}
} |
HELP Homework exercise
Linear Mode
