Using JRadioButtons
// : c14:SwingRadioButtons.java
// Using JRadioButtons.
// <applet code=SwingRadioButtons width=200 height=100></applet>
// From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
// www.BruceEckel.com. See copyright notice in CopyRight.txt.
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JApplet;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
public class SwingRadioButtons extends JApplet {
private JTextField t = new JTextField(15);
private ButtonGroup g = new ButtonGroup();
private JRadioButton rb1 = new JRadioButton("one", false),
rb2 = new JRadioButton("two", false), rb3 = new JRadioButton(
"three", false);
private ActionListener al = new ActionListener() {
public void actionPerformed(ActionEvent e) {
t.setText("Radio button "
+ ((JRadioButton) e.getSource()).getText());
}
};
public void init() {
rb1.addActionListener(al);
rb2.addActionListener(al);
rb3.addActionListener(al);
g.add(rb1);
g.add(rb2);
g.add(rb3);
t.setEditable(false);
Container cp = getContentPane();
cp.setLayout(new FlowLayout());
cp.add(t);
cp.add(rb1);
cp.add(rb2);
cp.add(rb3);
}
public static void main(String[] args) {
run(new SwingRadioButtons(), 200, 100);
}
public static void run(JApplet applet, int width, int height) {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(applet);
frame.setSize(width, height);
applet.init();
applet.start();
frame.setVisible(true);
}
} ///:~
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