import java.awt.FlowLayout;
import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JRadioButton;
public class JRadioButtonTest {
public static void main(String[] args) {
JFrame.setDefaultLookAndFeelDecorated(true);
JFrame frame = new JFrame("JRadioButton Test");
frame.setLayout(new FlowLayout());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JRadioButton button1 = new JRadioButton("Red");
JRadioButton button2 = new JRadioButton("Green");
JRadioButton button3 = new JRadioButton("Blue");
ButtonGroup colorButtonGroup = new ButtonGroup();
colorButtonGroup.add(button1);
colorButtonGroup.add(button2);
colorButtonGroup.add(button3);
button1.setSelected(true);
frame.add(new JLabel("Color:"));
frame.add(button1);
frame.add(button2);
frame.add(button3);
frame.pack();
frame.setVisible(true);
}
}