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  1. import javax.swing.*;
  2. import java.awt.*;
  3.  
  4. public class TicketPrice extends JFrame {
  5.  
  6.     public static void main(String[] args) {
  7.         TicketPrice ticketPrice = new TicketPrice("映画料金");
  8.         ticketPrice.setVisible(true);
  9.     }
  10.  
  11.     TicketPrice(String title) {
  12.         setTitle(title);
  13.         setSize(400, 150);
  14.         setLocationRelativeTo(null);
  15.         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  16.  
  17.         JPanel panel = new JPanel();
  18.         GridLayout layout = new GridLayout(3, 3);
  19.         panel.setLayout(layout);
  20.  
  21.         JRadioButton childRadioButton = new JRadioButton("子供");
  22.         JRadioButton studentRadioButton = new JRadioButton("学生");
  23.         JRadioButton adultRadioButton = new JRadioButton("大人");
  24.  
  25.         ButtonGroup group = new ButtonGroup();
  26.         group.add(childRadioButton);
  27.         group.add(studentRadioButton);
  28.         group.add(adultRadioButton);
  29.  
  30.         panel.add(childRadioButton);
  31.         panel.add(studentRadioButton);
  32.         panel.add(adultRadioButton);
  33.  
  34.         JButton general = new JButton("一般");
  35.         JButton threeDimensional = new JButton("3D");
  36.         JButton movieDay = new JButton("映画の日");
  37.  
  38.         panel.add(general);
  39.         panel.add(threeDimensional);
  40.         panel.add(movieDay);
  41.  
  42.         JLabel fee = new JLabel("料金", JLabel.CENTER);
  43.         JLabel result = new JLabel();
  44.         result.setOpaque(true);
  45.         result.setBackground(Color.WHITE);
  46.         result.setHorizontalAlignment(JLabel.CENTER);
  47.  
  48.         panel.add(fee);
  49.         panel.add(result);
  50.  
  51.         general.addActionListener(event -> {
  52.             if (childRadioButton.isSelected()) {
  53.                 result.setText("1000円");
  54.             } else if (studentRadioButton.isSelected()) {
  55.                 result.setText("1500円");
  56.             } else if (adultRadioButton.isSelected()) {
  57.                 result.setText("1800円");
  58.             }
  59.         });
  60.  
  61.         threeDimensional.addActionListener(event -> {
  62.             if (childRadioButton.isSelected()) {
  63.                 result.setText("1400円");
  64.             } else if (studentRadioButton.isSelected()) {
  65.                 result.setText("1900円");
  66.             } else if (adultRadioButton.isSelected()) {
  67.                 result.setText("2200円");
  68.             }
  69.         });
  70.  
  71.         movieDay.addActionListener(event -> {
  72.             if (childRadioButton.isSelected()) {
  73.                 result.setText("1000円");
  74.             } else if (studentRadioButton.isSelected() || adultRadioButton.isSelected()) {
  75.                 result.setText("1100円");
  76.             }
  77.         });
  78.  
  79.         getContentPane().add(panel, BorderLayout.CENTER);
  80.     }
  81.  
  82. }
Compilation error #stdin compilation error #stdout 0s 0KB
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stdin
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Standard input is empty
compilation info 
Main.java:4: error: class TicketPrice is public, should be declared in a file named TicketPrice.java
public class TicketPrice extends JFrame {
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/SMR38R
language:
Java (HotSpot 12)
created:
6 years ago
visibility:
secret

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