/**单选框*/
import java.awt.Container;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;class TestRadioButton extends JFrame implements ItemListener
{
JRadioButton btn1,btn2,btn3;
ButtonGroup fee;
JPanel panel; public TestRadioButton(){
Container con=getContentPane();
fee=new ButtonGroup();
btn1=new JRadioButton("电费");
btn2=new JRadioButton("水费");
btn3=new JRadioButton("燃气费");
fee.add(btn1);
fee.add(btn2);
fee.add(btn3);
panel=new JPanel();
panel.add(btn1);
panel.add(btn2);
panel.add(btn3); con.add(panel);
btn1.addItemListener(this);
btn2.addItemListener(this);
btn3.addItemListener(this);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
}
public void itemStateChanged(ItemEvent e){
if(e.getItemSelectable()==btn1){
System.out.println("我来收电费了");
}else if(e.getItemSelectable()==btn2){
System.out.println("我来收水费了");
}else if(e.getItemSelectable()==btn3){
System.out.println("我来收燃气费");
}
}
public static void main(String[] args)
{
TestRadioButton test=new TestRadioButton();
test.setSize(200,100);
test.setVisible(true);
}
}
import java.awt.Container;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;class TestRadioButton extends JFrame implements ItemListener
{
JRadioButton btn1,btn2,btn3;
ButtonGroup fee;
JPanel panel; public TestRadioButton(){
Container con=getContentPane();
fee=new ButtonGroup();
btn1=new JRadioButton("电费");
btn2=new JRadioButton("水费");
btn3=new JRadioButton("燃气费");
fee.add(btn1);
fee.add(btn2);
fee.add(btn3);
panel=new JPanel();
panel.add(btn1);
panel.add(btn2);
panel.add(btn3); con.add(panel);
btn1.addItemListener(this);
btn2.addItemListener(this);
btn3.addItemListener(this);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
}
public void itemStateChanged(ItemEvent e){
if(e.getItemSelectable()==btn1){
System.out.println("我来收电费了");
}else if(e.getItemSelectable()==btn2){
System.out.println("我来收水费了");
}else if(e.getItemSelectable()==btn3){
System.out.println("我来收燃气费");
}
}
public static void main(String[] args)
{
TestRadioButton test=new TestRadioButton();
test.setSize(200,100);
test.setVisible(true);
}
}
if (e.getStateChange() == 1) {
if (e.getItemSelectable() == btn1) {
System.out.println("我来收电费了");
} else if (e.getItemSelectable() == btn2) {
System.out.println("我来收水费了");
} else if (e.getItemSelectable() == btn3) {
System.out.println("我来收燃气费");
}
}
}
import java.awt.event.*;
import java.awt.event.ItemListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent; import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton; class TestRadioButton extends JFrame implements ActionListener
{
JRadioButton btn1,btn2,btn3;
ButtonGroup fee;
JPanel panel; public TestRadioButton(){
Container con=getContentPane();
fee=new ButtonGroup();
btn1=new JRadioButton("电费");
btn2=new JRadioButton("水费");
btn3=new JRadioButton("燃气费");
fee.add(btn1);
fee.add(btn2);
fee.add(btn3);
panel=new JPanel();
panel.add(btn1);
panel.add(btn2);
panel.add(btn3); con.add(panel);
btn1.addActionListener(this);
btn2.addActionListener(this);
btn3.addActionListener(this);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==btn1){
System.out.println("我来收电费了");
}else if(e.getSource()==btn2){
System.out.println("我来收水费了");
}else if(e.getSource()==btn3){
System.out.println("我来收燃气费");
}
}
public static void main(String[] args)
{
TestRadioButton test=new TestRadioButton();
test.setSize(200,100);
test.setVisible(true);
}
}
import java.awt.event.*;
import java.awt.event.ItemListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent; import javax.swing.ButtonGroup;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton; class TestRadioButton extends JFrame implements ActionListener
{
JRadioButton btn1,btn2,btn3;
ButtonGroup fee;
JPanel panel; public TestRadioButton(){
Container con=getContentPane();
fee=new ButtonGroup();
btn1=new JRadioButton("电费");
btn2=new JRadioButton("水费");
btn3=new JRadioButton("燃气费");
fee.add(btn1);
fee.add(btn2);
fee.add(btn3);
panel=new JPanel();
panel.add(btn1);
panel.add(btn2);
panel.add(btn3); con.add(panel);
btn1.addActionListener(this);
btn2.addActionListener(this);
btn3.addActionListener(this);
addWindowListener(new WindowAdapter(){
public void windowClosing(WindowEvent e){
System.exit(0);
}
});
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==btn1){
System.out.println("我来收电费了");
}else if(e.getSource()==btn2){
System.out.println("我来收水费了");
}else if(e.getSource()==btn3){
System.out.println("我来收燃气费");
}
}
public static void main(String[] args)
{
TestRadioButton test=new TestRadioButton();
test.setSize(200,100);
test.setVisible(true);
}
} [/code]