本文实例讲述了java之swing单选框用法。分享给大家供大家参考。具体如下：
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import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class test extends JApplet
implements ActionListener{
JTextField jtf;
public void init(){
Container contentPane = getContentPane();
contentPane.setLayout(new FlowLayout());
JRadioButton b1 = new JRadioButton("A");
b1.addActionListener(this);
contentPane.add(b1);
JRadioButton b2 = new JRadioButton("B");
b2.addActionListener(this);
contentPane.add(b2);
JRadioButton b3 = new JRadioButton("C");
b3.addActionListener(this);
contentPane.add(b3);
ButtonGroup bg = new ButtonGroup();
bg.add(b1);
bg.add(b2);
bg.add(b3);
jtf = new JTextField(15);
contentPane.add(jtf);
}
public void actionPerformed(ActionEvent ae){
jtf.setText(ae.getActionCommand());
}
}
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希望本文所述对大家的java程序设计有所帮助。