Swing单选按钮举例 importjava.awt.*; import java.awt.event.*; import javax.swing.*; public class JRadio extends JFrame private JLabel Ibl; private JRadioButton pla,bol,ita; private ButtonGroup buttonG; public JRadio() super("JRadioButton Example"); Container c=getContentPaneO; c.setLayout(new FlowLayout(); Ibl=new JLabel("Plain is selected"); pla=new JRadioButton("Plain",true); bol=new JRadioButton("Bold",false); ita=new JRadioButton("Italic",false); Swing单选按钮举例 import java.awt.*; import java.awt.event.*; import javax.swing.*; public class JRadio extends JFrame { private JLabel lbl; private JRadioButton pla, bol,ita; private ButtonGroup buttonG; public JRadio() { super("JRadioButton Example"); Container c = getContentPane(); c.setLayout( new FlowLayout() ); lbl=new JLabel("Plain is selected"); pla=new JRadioButton("Plain",true); bol=new JRadioButton("Bold",false); ita=new JRadioButton("Italic",false);