CheckBoxDemo.java Source code

Introduction

Here is the source code for CheckBoxDemo.java

Source

import java.awt.Font;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class CheckBoxDemo extends JFrame implements ActionListener {

    JLabel fontLabel = new JLabel("The quick brown fox jumps over the lazy dog.");

    private JCheckBox bold = new JCheckBox("Bold");

    private JCheckBox italic = new JCheckBox("Italic");

    public CheckBoxDemo() {
        setTitle("CheckBoxTest");
        setSize(300, 200);
        addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

        JPanel p = new JPanel();
        p.add(bold);
        p.add(italic);
        bold.addActionListener(this);
        italic.addActionListener(this);
        getContentPane().add(p, "South");
        getContentPane().add(fontLabel, "Center");
    }

    public void actionPerformed(ActionEvent evt) {
        int m = (bold.isSelected() ? Font.BOLD : 0) + (italic.isSelected() ? Font.ITALIC : 0);
        fontLabel.setFont(new Font("SansSerif", m, 12));
    }

    public static void main(String[] args) {
        JFrame frame = new CheckBoxDemo();
        frame.show();
    }
}