JRadioButton用法
import javax.swing.JPanel;import javax.swing.JFrame;import javax.swing.JRadioButton;import javax.swing.ButtonGroup;import java.awt.Dimension;import java.awt.Color;import java.awt.FlowLayout;
public class JRadioButtonDemo{ public static void main(String[] args) { JRadioButton red, white, cyan; red = new JRadioButton ("red"); white = new JRadioButton ("white"); cyan = new JRadioButton ("cyan"); ButtonGroup group = new ButtonGroup (); group.add (red); group.add (white); group.add (cyan); JPanel panel = new JPanel (new FlowLayout (FlowLayout.CENTER, 1, 0)); panel.setBackground (Color.white); panel.setPreferredSize (new Dimension (200,50)); panel.add (red); panel.add (white); panel.add (cyan); JFrame frame = new JFrame("JRadioButtonDemo"); frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE); frame.setContentPane(panel); frame.pack(); frame.show(); }}
