Java GUI之(JRadioButton、JCheckBox、JTextArea)实例

package BookProblem;

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JLabel;
import javax.swing.JCheckBox;
import javax.swing.JRadioButton;
import javax.swing.ButtonGroup;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import java.awt.event.ActionListener;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;
import java.awt.event.ActionEvent;

public class P381Problem6B extends JFrame {

private JPanel contentPane;
private JTextArea textArea;
private Set Hobbies = new HashSet();//兴趣爱好
private String Gender ="";//性别
private final ButtonGroup buttonGroup = new ButtonGroup();

/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
P381Problem6B frame = new P381Problem6B();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}

/**
* Create the frame.
*/
public P381Problem6B() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 440);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);

JPanel panel = new JPanel();
panel.setBounds(10, 10, 414, 74);
contentPane.add(panel);
panel.setLayout(null);

JLabel Peference = new JLabel("兴趣");
Peference.setBounds(10, 10, 54, 15);
panel.add(Peference);

JCheckBox Badminton = new JCheckBox("羽毛球");
Badminton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (Badminton.isSelected()) {
Hobbies.add(Badminton.getText());//选中的复选框把文本添加到 Set 集合中
} else {
Hobbies.remove(Badminton.getText());//反之从集合中移除
}
PrintJTextArea();
}
});
Badminton.setBounds(70, 6, 66, 23);
panel.add(Badminton);

JCheckBox TableTennis = new JCheckBox("乒乓球");
TableTennis.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(TableTennis.isSelected()){
Hobbies.add(TableTennis.getText());//选中的复选框把文本添加到 Set 集合中
}else{
Hobbies.remove(TableTennis.getText());//反之从集合中移除
}
PrintJTextArea();
}
});
TableTennis.setBounds(138, 6, 66, 23);
panel.add(TableTennis);

JCheckBox Sing = new JCheckBox("唱歌");
Sing.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if(Sing.isSelected()){
Hobbies.add(Sing.getText());//选中的复选框把文本添加到 Set 集合中
}else{
Hobbies.remove(Sing.getText());//反之从集合中移除
}
PrintJTextArea();
}
});
Sing.setBounds(200, 6, 66, 23);
panel.add(Sing);

JLabel Sex = new JLabel("性别");
Sex.setBounds(10, 49, 54, 15);
panel.add(Sex);

JRadioButton Man = new JRadioButton("男");
Man.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Gender =Man.getText();
PrintJTextArea();
}
});
buttonGroup.add(Man);
Man.setBounds(70, 45, 66, 23);
panel.add(Man);

JRadioButton Fale = new JRadioButton("女");
Fale.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Gender =Fale.getText();
PrintJTextArea();
}
});
buttonGroup.add(Fale);
Fale.setBounds(138, 45, 66, 23);
panel.add(Fale);

JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(10, 89, 414, 303);
contentPane.add(scrollPane);

textArea = new JTextArea();
scrollPane.setViewportView(textArea);
}

protected void PrintJTextArea() {
// TODO Auto-generated method stub
textArea.setText("");
if (Hobbies.size() > 0)//如果 Set 集合中有元素，打印兴趣
textArea.append("你的兴趣爱好有: ");
Iterator it = Hobbies.iterator();
while (it.hasNext()) {
textArea.append(it.next() + " ");
}
if (!"".equals(Gender))//如果 Gender 不为空字符串，打印性别
textArea.append("\n你的性别为： " + Gender);
}
}