Java - 将选择的单选按钮的值传递给另一帧
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Java - pass value of one radio button that selected to another frame
提问by TinyBelly
Is there any code that I can use to pass value of selected radio button to another frame?
是否有任何代码可用于将所选单选按钮的值传递到另一个框架？
This is my code:
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
}
}
回答by Hovercraft Full Of Eels
Don't think of it as passing information from one GUI to another, but rather think of it in its most basic OOP form: as passing object state from one object to another. Often we use public accessor methods (i.e., "getter" methods) for this purpose and this can work here too.
不要将其视为从一个 GUI 向另一个 GUI 传递信息，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。为此，我们经常使用公共访问器方法（即“getter”方法），这也可以在这里工作。
Your ButtonGroup object will hold the ButtonModel of the selected JRadioButton (or null if none are selected) and so you can get the information from the model and return it from your getter method.
您的 ButtonGroup 对象将保存所选 JRadioButton 的 ButtonModel （如果没有选择则为 null），因此您可以从模型中获取信息并从您的 getter 方法中返回它。
As an aside, your code has a lot of redundancies that can be reduced by using arrays and by using appropriate layout managers.
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。
edit 1:
For Example
Say we create a JPanel that holds a bunch of JRadioButtons:
编辑 1：
例如
假设我们创建了一个包含一堆 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();
}
}
}
We also give it a public getter method that queries the state of the ButtonGroup to find out which button model has been selected and then return its actionCommand, a String that holds the text that describes the radio button (here it's the same as the text of the radio button).
我们还给它一个公共的 getter 方法，它查询 ButtonGroup 的状态以找出哪个按钮模型被选中，然后返回它的 actionCommand，一个包含描述单选按钮的文本的字符串（这里它与单选按钮）。
We can then show this JPanel in a JOptionPane in our main GUI and after the JOptionPane is done, query the object above by calling its getSelectedButtonText() method:
然后我们可以在主 GUI 的 JOptionPane 中显示这个 JPanel，在 JOptionPane 完成后，通过调用它的 getSelectedButtonText() 方法查询上面的对象：
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();
}
});
}
}
