Java - 将选择的单选按钮的值传递给另一帧 [英] Java - pass value of one radio button that selected to another frame

问题描述

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?

Is there any code that I can use to pass value of selected radio button to another frame?

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

        }


}

推荐答案

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:作为从一个 GUI 传递对象状态反对另一个.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.

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.

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.

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.

顺便说一句，您的代码有很多冗余，可以通过使用数组和适当的布局管理器来减少.

As an aside, your code has a lot of redundancies that can be reduced by using arrays and by using appropriate layout managers.

例如
假设我们创建了一个包含一堆 JRadioButtons 的 JPanel:

edit 1:
For Example
Say we create a JPanel that holds a bunch of JRadioButtons:

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();
      }
   }
}

我们还给了它一个公共的getter方法，它查询ButtonGroup的状态，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(这里它与单选按钮的文本).

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).

然后，我们可以在主 GUI 的 JOptionPane 中显示此 JPanel，并在 JOptionPane 完成后，通过调用其 getSelectedButtonText() 方法查询上面的对象:

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:

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();
         }
      });
   }
}

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