如何把值複選框

Question

這是我的代碼，我只是想打個收據，當您選中該複選框在它那裏有值，並將其與值打印標籤連續

import java.awt.event.*; 
import java.awt.*; 
import javax.swing.*; 
import javax.swing.JButton; 
import javax.swing.JLabel; 
import javax.swing.JPanel; 


public class GUI extends JFrame implements ActionListener 

{ 

private JLabel label; 
private JCheckBox checkbox,checkbox2,checkbox3,checkbox4,checkbox5, 
checkbox6,checkbox7,checkbox8,checkbox9, 
checkbox10,checkbox11,checkbox12,checkbox13,checkbox14,checkbox15, 
checkbox16,checkbox17,checkbox18,checkbox19,checkbox20; 
private JButton button; 


public GUI() 
{ 
Container pane= getContentPane(); 
pane.setLayout(new GridLayout(15,1)); 

JPanel jp= new JPanel(); 

label= new JLabel("McDonald's"); 
checkbox = new JCheckBox("Cheese Burger"); 
checkbox2 = new JCheckBox("Big Mac"); 
checkbox3 = new JCheckBox("Big n' Tasty"); 
checkbox4 = new JCheckBox("McSpicy"); 
checkbox5 = new JCheckBox("Quarter Pounder with Cheese"); 
checkbox6 = new JCheckBox("Double Cheeseburger"); 
checkbox7 = new JCheckBox("McChicken Sandwich"); 
checkbox8 = new JCheckBox("Filet-O-Fish"); 
checkbox9 = new JCheckBox("Cheeseburger Deluxe"); 
checkbox10 = new JCheckBox("Burger Mcdo"); 
checkbox11 = new JCheckBox("Chicken Filet with Drinks"); 
checkbox12 = new JCheckBox("Spaghetti with Drinks"); 
checkbox13 = new JCheckBox("Hot Fudge Sundae "); 
checkbox14 = new JCheckBox("Caramel Sundae"); 
checkbox15 = new JCheckBox("Large Mcdo French Fries"); 
checkbox16 = new JCheckBox("Chicken Nuggets with coke"); 
checkbox17 = new JCheckBox("Coke Float"); 
checkbox18 = new JCheckBox("Green Apple Float"); 
checkbox19 = new JCheckBox("Crispy Chicken with rice"); 
checkbox20 = new JCheckBox("Oreo Sundae"); 
button = new JButton("Order Now"); 

add(label); 

pane.add(checkbox); 
pane.add(checkbox2); 
pane.add(checkbox3); 
pane.add(checkbox4); 
pane.add(checkbox5); 
pane.add(checkbox6); 
pane.add(checkbox7); 
pane.add(checkbox8); 
pane.add(checkbox9); 
pane.add(checkbox10); 
pane.add(checkbox11); 
pane.add(checkbox12); 
pane.add(checkbox13); 
pane.add(checkbox14); 
pane.add(checkbox15); 
pane.add(checkbox16); 
pane.add(checkbox17); 
pane.add(checkbox18); 
pane.add(checkbox19); 
pane.add(checkbox20); 

add(button); 
add(jp, BorderLayout.SOUTH); 
label.setHorizontalAlignment(JLabel.CENTER); 

button.setSize(10,10); 
button.addActionListener(this); 

setSize(500,550); 
setVisible(true); 

} 
public void actionPerformed(ActionEvent e) 
{ 
String gulp = e.getActionCommand(); 
{ 
if (gulp.equals("Order Now")) 
    { 
    new Receipt(); 
    setVisible(true); 
    dispose(); 
} 
} 
} 
public static void main(String[] args) 
{ 
GUI r= new GUI(); 
} 
} 

這裏我的第二個代碼，這是收據我要實現

import java.awt.event.*; 
import java.awt.*; 
import javax.swing.*; 
public class Receipt extends JFrame 
{ 

private JLabel label,label2,label3,label4,label5, 
label6,label7,label8,label9,label10;; 


public Receipt() 
{ 
    Container pane= getContentPane(); 
    pane.setLayout(new GridLayout(13,1)); 

    label= new JLabel("MC DONALD'S"); 
    label2= new JLabel("McDonald's Tandang Sora"); 
    label3= new JLabel("#22 Tandang Sora Corner, Commonwealth Avenue, Quezon City"); 
    label4= new JLabel("Telephone# (02)86236"); 
    label5= new JLabel("MACHINE SERIAL NUMBER: D123HJ01"); 


    label6= new JLabel("Card Issuer: Sharina Tortoles"); 
    label7= new JLabel("Account Number# 337163990"); 
    label8= new JLabel("February 22, 2014 12:45"); 
    label9= new JLabel("Thank You for choosing Mcdonald's"); 
    label10= new JLabel("Please come again"); 


    label.setHorizontalAlignment(JLabel.CENTER); 
    label2.setHorizontalAlignment(JLabel.CENTER); 
    label3.setHorizontalAlignment(JLabel.CENTER); 
    label4.setHorizontalAlignment(JLabel.CENTER); 
    label5.setHorizontalAlignment(JLabel.CENTER); 
    label6.setHorizontalAlignment(JLabel.CENTER); 
    label7.setHorizontalAlignment(JLabel.CENTER); 
    label8.setHorizontalAlignment(JLabel.CENTER); 
    label9.setHorizontalAlignment(JLabel.CENTER); 
    label10.setHorizontalAlignment(JLabel.CENTER); 

    pane.add(label, BorderLayout.NORTH); 
    pane.add(label2); 
    pane.add(label3); 
    pane.add(label4); 
    pane.add(label5); 
    pane.add(label6); 
    pane.add(label7); 
    pane.add(label8); 
    pane.add(label9); 
    pane.add(label10); 


    setSize(500,500); 
    setVisible(true); 
} 

public static void main(String[] args) 
{ 
    Receipt g= new Receipt(); 

    } 
} 

希望它很清楚，你是我想要的代碼發生的格式

Answer 1

我猜EnumSet是什麼你正在尋找：

import java.awt.*; 
import java.awt.event.*; 
import java.util.*; 
import java.util.List; 
import javax.swing.*; 

enum Receipt { 
    CheeseBurger("Cheese Burger"), 
    BigMac("Big Mac"), 
    BigNTasty("Big n' Tasty"), 
    McSpicy("McSpicy"), 
    QuarterPounderWithCheese("Quarter Pounder with Cheese"), 
    DoubleCheeseburger("Double Cheeseburger"), 
    McChickenSandwich("McChicken Sandwich"); 
    //JCheckBox("Filet-O-Fish"), 
    //JCheckBox("Cheeseburger Deluxe"), 
    //JCheckBox("Burger Mcdo"), 
    //JCheckBox("Chicken Filet with Drinks"), 
    //JCheckBox("Spaghetti with Drinks"), 
    //JCheckBox("Hot Fudge Sundae "), 
    //JCheckBox("Caramel Sundae"), 
    //JCheckBox("Large Mcdo French Fries"), 
    //JCheckBox("Chicken Nuggets with coke"), 
    //JCheckBox("Coke Float"), 
    //JCheckBox("Green Apple Float"), 
    //JCheckBox("Crispy Chicken with rice"), 
    //JCheckBox("Oreo Sundae"); 
    private final String str; 
    private Receipt(String str) { 
    this.str = str; 
    } 
    @Override public String toString() { 
    return str; 
    } 
} 

public class GUI2 { 
    private JButton button = new JButton(new AbstractAction("Order Now") { 
    @Override public void actionPerformed(ActionEvent e) { 
     EnumSet<Receipt> r = EnumSet.noneOf(Receipt.class); 
     for (ReceiptCheckBox c: list) { 
     if (c.isSelected()) { 
      r.add(c.getReceipt()); 
     } 
     } 
     JOptionPane.showMessageDialog((JComponent) e.getSource(), r); 
    } 

    }); 
    private List<ReceiptCheckBox> list = new ArrayList<>(Receipt.values().length); 

    public JComponent makeUI() { 
    JPanel p = new JPanel(); 
    for (Receipt r: Receipt.values()) { 
     ReceiptCheckBox c = new ReceiptCheckBox(r); 
     list.add(c); 
     p.add(c); 
    } 
    JPanel panel = new JPanel(new BorderLayout()); 
    panel.add(new JLabel("McDonald's"), BorderLayout.NORTH); 
    panel.add(button, BorderLayout.SOUTH); 
    panel.add(p); 
    return panel; 
    } 
    public static void main(String[] args) { 
    EventQueue.invokeLater(new Runnable() { 
     @Override public void run() { 
     createAndShowGUI(); 
     } 
    }); 
    } 
    public static void createAndShowGUI() { 
    JFrame f = new JFrame(); 
    f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); 
    f.getContentPane().add(new GUI2().makeUI()); 
    f.setSize(320, 240); 
    f.setLocationRelativeTo(null); 
    f.setVisible(true); 
    } 
} 

class ReceiptCheckBox extends JCheckBox { 
    private final Receipt receipt; 
    public ReceiptCheckBox(Receipt receipt) { 
    super(receipt.toString()); 
    this.receipt = receipt; 
    } 
    public Receipt getReceipt() { 
    return receipt; 
    } 
}