是否有任何代码可用于将所选单选按钮的值传递给另一帧？
这是我的代码：
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class bookBatman extends JFrame implements ActionListener {
private JLabel jlbName, jlbTime, jlbPic, jlbDate, jlbDescription, jlbAuthor, jlbDateProduce, jlbDirector, jlbActor, jlbRate, jlbNoOfTicket, jlbPrice, jlbTotal;
private JTextField jtfNoOfTicket;
private JRadioButton jr1, jr2, jr3, jr4, jr5, jr6, jr7, jr8, jr9, jr10;
private JButton jTotal, jBook, jCancel;
Font f = new Font("Times",Font.BOLD,30);
public bookBatman () {
setLayout(null); //set LayoutManager
// initialized the label
jlbName = new JLabel ("Batman The Dark Knight");
jlbTime = new JLabel ("Time :");
jlbPrice = new JLabel ("RM 9.00");
jlbPic = new JLabel ();
jlbPic.setIcon(new ImageIcon("C:\\Users\\User\\Desktop\\OOP project\\img\\icon\\Batman.jpg"));
jlbTotal = new JLabel (" Total : RM 9.00");
// add all the label on the frame
add(jlbName);
add(jlbPic);
add(jlbTime);
add(jlbPrice);
add(jlbTotal);
// set all the label positions
jlbName.setBounds(85, 78, 300, 18); //(int x, int y, int width, int height)
jlbPic.setBounds(74, 101, 180, 288);
jlbTime.setBounds(74, 400, 60, 18);
jlbPrice.setBounds (270, 477, 60, 18);
jlbTotal.setBounds (339, 475, 300, 22);
// initialized the textfield
jlbAuthor = new JLabel ("Directed by Christopher Nolan");
jlbDateProduce = new JLabel ("Date : 17 July 2008");
jlbDirector = new JLabel ("Author : Jonathan Nolan, Christopher Nolan");
jlbActor = new JLabel ("Main Actor : Christian Bale");
jlbRate = new JLabel ("Movie Rate : 13 PG (Parental Guidance)");
jlbNoOfTicket = new JLabel ("Number of Ticket :");
// add all the textfield on the frame
add(jlbAuthor);
add(jlbDateProduce);
add(jlbDirector);
add(jlbActor);
add(jlbRate);
add(jlbNoOfTicket);
// set the textfield position
jlbAuthor.setBounds (273, 102, 300, 18);
jlbDateProduce.setBounds (273, 132, 300, 18);
jlbDirector.setBounds (273, 162, 300, 18);
jlbActor.setBounds (273, 192, 300, 18);
jlbRate.setBounds (273, 222, 300, 18);
jlbNoOfTicket.setBounds (77, 478, 150, 18);
// initialize the Radio Button
jr1 = new JRadioButton ("11.40 AM");
jr2 = new JRadioButton ("12.00 PM");
jr3 = new JRadioButton ("1.40 PM");
jr4 = new JRadioButton ("3.40 PM");
jr5 = new JRadioButton ("5.40 PM");
jr6 = new JRadioButton ("7.00 PM");
jr7 = new JRadioButton ("9.00 PM");
jr8 = new JRadioButton ("10.40 PM");
jr9 = new JRadioButton ("11.40 PM");
jr10 = new JRadioButton ("12.40 AM");
// add all the radion button
add(jr1);
add(jr2);
add(jr3);
add(jr4);
add(jr5);
add(jr6);
add(jr7);
add(jr8);
add(jr9);
add(jr10);
// set the radion button positions
jr1.setBounds (75, 423, 100, 24);
jr2.setBounds (172, 423, 100, 24);
jr3.setBounds (269, 423, 100, 24);
jr4.setBounds (366, 423, 100, 24);
jr5.setBounds (463, 423, 100, 24);
jr6.setBounds (75, 447, 100, 24);
jr7.setBounds (172, 447, 100, 24);
jr8.setBounds (269, 447, 100, 24);
jr9.setBounds (366, 447, 100, 24);
jr10.setBounds (463, 447, 100, 24);
// group the button
ButtonGroup group = new ButtonGroup ();
group.add(jr1);
group.add(jr2);
group.add(jr3);
group.add(jr4);
group.add(jr5);
group.add(jr6);
group.add(jr7);
group.add(jr8);
group.add(jr9);
group.add(jr10);
jr1.setActionCommand("radio1"); // for ButtonGroup
String sel = group.getSelection().getActionCommand();
// initialize all the button
jTotal = new JButton ("Total");
jBook = new JButton ("Book Now");
jCancel = new JButton ("Cancel");
// add all the button
add (jTotal);
add (jBook);
add (jCancel);
// set the button positions
jTotal.setBounds (191, 519, 83, 28);
jBook.setBounds (285, 519, 93, 28);
jCancel.setBounds (389, 519, 83, 28);
// add actionlistener
jTotal.addActionListener (this);
jBook.addActionListener (this);
jCancel.addActionListener (this);
// initialize all text field
jtfNoOfTicket = new JTextField (15);
// add all the text field
add (jtfNoOfTicket);
// set the text field positions
jtfNoOfTicket.setBounds (200, 477, 56, 22);
}
public void actionPerformed(ActionEvent e){
if((e.getSource() == jTotal)) {
double price = 12.00;
double number = (Integer.parseInt(jtfNoOfTicket.getText().trim()));
double total = 0.0;
total = price * number;
jlbTotal.setText(" Total : RM" + total +"0");
}
if((e.getSource() == jBook)) {
String name = jlbName.getText ();
String date = jlbDateProduce.getText ();
String time = jr1.getText ();
int number = (Integer.parseInt(jtfNoOfTicket.getText().trim()));
String total = jlbTotal.getText ();
String price = jlbPrice.getText ();
//Passing
ticketReservation frame = new ticketReservation(name, date, time, price, total, String.valueOf(number));
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("Ticket Reservation"); //set title of the window
frame.setSize(800,600); //size of the window
frame.setVisible(true); //visible the window
frame.setLocationRelativeTo (null); //center the window
}
if((e.getSource() == jCancel)) {
listOfMovies frame = new listOfMovies ();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("List of Movies"); //set title of thewindow
frame.setSize(800,600); //size of the window
frame.setVisible(true); //visible the window
frame.setLocationRelativeTo (null); //center the window
}
}
public static void main (String [] args) {
bookBatman frame = new bookBatman ();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("Book Batman : The Dark Knight"); //set title of thewindow
frame.setSize(800,600); //size of the window
frame.setVisible(true); //visible the window
frame.setLocationRelativeTo (null); //center the window
}
}
答案 0 :(得分：4)
不要将其视为将信息从一个GUI传递到另一个GUI，而是将其视为最基本的OOP形式：将对象状态从一个对象传递到另一个对象。我们通常会为此目的使用公共访问器方法（即“getter”方法），这也适用于此。
您的ButtonGroup对象将保存所选JRadioButton的ButtonModel（如果未选择任何一个，则为null），这样您就可以从模型中获取信息并从getter方法返回。
顺便说一句，您的代码有很多冗余，可以通过使用数组和使用适当的布局管理器来减少。
编辑1：
例如
假设我们创建了一个包含大量JRadioButtons的JPanel：
import java.awt.GridLayout;
import javax.swing.*;
class RadioBtnDialogPanel extends JPanel {
private static final String[] BUTTON_TEXTS = {"Monday", "Tuesday", "Wednesday", "Thursday", "Friday"};
private ButtonGroup buttonGroup = new ButtonGroup();
public RadioBtnDialogPanel() {
setLayout(new GridLayout(0, 1)); // give JPanel a decent layout
// create radio buttons, add to button group and to JPanel
for (String buttonText : BUTTON_TEXTS) {
JRadioButton radioBtn = new JRadioButton(buttonText);
radioBtn.setActionCommand(buttonText); // set the actionCommand here
buttonGroup.add(radioBtn);
add(radioBtn);
}
}
// getter or accessor method to get selected JRadioButton's actionCommand text
public String getSelectedButtonText() {
ButtonModel model = buttonGroup.getSelection();
if (model == null) { // no radiobutton selected
return "";
} else {
return model.getActionCommand();
}
}
}
我们还为它提供了一个公共getter方法，用于查询ButtonGroup的状态以找出已选择的按钮模型，然后返回其actionCommand，一个包含描述单选按钮的文本的String（这里它与单选按钮的文字。）
然后我们可以在主GUI中的JOptionPane中显示这个JPanel，在JOptionPane完成之后，通过调用它的getSelectedButtonText（）方法来查询上面的对象：
import java.awt.event.*;
import javax.swing.*;
public class RadioButtonInfo extends JPanel {
private RadioBtnDialogPanel radioBtnDlgPanel = new RadioBtnDialogPanel();
private JTextField textfield = new JTextField(10);
public RadioButtonInfo() {
JButton getDayOfWeekBtn = new JButton("Get Day Of Week");
getDayOfWeekBtn.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
getDayOfWeekActionPerformed();
}
});
textfield.setFocusable(false);
add(getDayOfWeekBtn);
add(textfield);
}
private void getDayOfWeekActionPerformed() {
// display a JOptionPane that holds the radioBtnDlgPanel
int result = JOptionPane.showConfirmDialog(this, radioBtnDlgPanel, "Select Day Of Week", JOptionPane.OK_CANCEL_OPTION);
if (result == JOptionPane.OK_OPTION) { // if use presses "OK" get the selected radio button text
// here we call the getter method to get the selected button text
String selectedButtonText = radioBtnDlgPanel.getSelectedButtonText();
textfield.setText(selectedButtonText); // and put it into a JTextField
}
}
private static void createAndShowUI() {
JFrame frame = new JFrame("RadioButtonInfo");
frame.getContentPane().add(new RadioButtonInfo());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
createAndShowUI();
}
});
}
}