java的swing單選框用法示例

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java的swing單選框用法示例

　　本文實例講述了java之swing單選框用法。具體如下：

　　import java.awt.*;import javax.swing.*;import java.awt.event.*;public class test extends JAppletimplements 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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