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import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.GridLayout;
import javax.swing.AbstractButton;
import javax.swing.ButtonModel;
import javax.swing.Icon;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
class CheckBoxIcon implements Icon {
public void paintIcon(Component component, Graphics g, int x, int y) {
AbstractButton abstractButton = (AbstractButton)component;
ButtonModel buttonModel = abstractButton.getModel();
Color color = buttonModel.isSelected() ? Color.BLUE : Color.RED;
g.setColor(color);
g.drawRect(1, 1, 20,20);
}
public int getIconWidth() {
return 20;
}
public int getIconHeight() {
return 20;
}
}
public class IconCheckBoxSample {
public static void main(String args[]) {
JFrame frame = new JFrame("Iconizing CheckBox");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Icon checked = new CheckBoxIcon();
Icon unchecked = new CheckBoxIcon();
JCheckBox aCheckBox1 = new JCheckBox("Pizza", unchecked);
aCheckBox1.setSelectedIcon(checked);
JCheckBox aCheckBox2 = new JCheckBox("Calzone");
aCheckBox2.setIcon(unchecked);
aCheckBox2.setSelectedIcon(checked);
Icon checkBoxIcon = new CheckBoxIcon();
JCheckBox aCheckBox3 = new JCheckBox("Anchovies", checkBoxIcon);
JCheckBox aCheckBox4 = new JCheckBox("Stuffed Crust", checked);
frame.setLayout(new GridLayout(0,1));
frame.add(aCheckBox1);
frame.add(aCheckBox2);
frame.add(aCheckBox3);
frame.add(aCheckBox4);
frame.setSize(300, 200);
frame.setVisible(true);
}
}
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