我的任务要求我使用 arrayList 来获取每个订单的用户选择并将它们显示在 Order Summary JOptionPane 中。我必须为arrayList 创建一个新类吗？我们在不使用 GUI 的情况下学习它们，所以我不确定如何让它显示在每个订单的订单摘要中。例如，如果有人选择了一个子类型，我将如何获取类型和价格，将其存储在 arrayList 中，并将其显示在订单摘要中。如果有人向我解释了如何做一个，那么我可以弄清楚其余的。
已编辑
我试图以与其他选项相同的方式获得“浇头”，但它不起作用。你如何让它与 JCheckBox 一起工作。另外，我如何用数字来获得价格？您可以在我的代码中看到我正在尝试使用案例/开关的方法。我究竟做错了什么？
谢谢
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.List;
import javax.swing.*;
public class Subway extends JFrame {
private String[] breadNames = {"9-grain Wheat", "Italian", "Honey Oat",
"Herbs and Cheese", "Flatbread"};
private String[] subTypes = {"Oven Roasted Chicken - $3.50",
"Meatball Marinara - $4.50", "Cold Cut Combo - $4.00",
"BLT - $3.75", "Blackforest Ham - $4.00", "Veggie Delight - $2.50"};
private String[] cheesetypes = {
"Cheddar", "American", "Provolone", "Pepperjack"};
private String[] size = {"6 inch", "Footlong"};
private String[] toasted = {"Yes", "No"};
private JTextField jtfname = new JTextField(10);
private JComboBox<String> jcbBread = new JComboBox<String>(breadNames);
private JComboBox<String> jcbtype = new JComboBox<String>(subTypes);
private JComboBox<String> jcbcheese = new JComboBox<String>(cheesetypes);
private JButton jbtExit = new JButton("EXIT");
private JButton jbtAnother = new JButton("Next Order");
private JButton jbtSubmit = new JButton("SUBMIT");
private JComboBox<String> jcbSize = new JComboBox<String>(size);
private JComboBox<String> jcbToasted = new JComboBox<String>(toasted);
private JCheckBox jcbLettuce = new JCheckBox("Lettuce");
private JCheckBox jcbSpinach = new JCheckBox("Spinach");
private JCheckBox jcbOnion = new JCheckBox("Onion");
private JCheckBox jcbPickles = new JCheckBox("Pickles");
private JCheckBox jcbTomatoes = new JCheckBox("Tomatoes");
private JCheckBox jcbPeppers = new JCheckBox("Peppers");
private JCheckBox jcbMayo = new JCheckBox("Mayo");
private JCheckBox jcbMustard = new JCheckBox("Mustard");
private JCheckBox jcbDressing = new JCheckBox("Italian Dressing");
public Subway() {
//name
JPanel p1 = new JPanel(new GridLayout(24, 1));
p1.add(new JLabel("Enter Name"));
p1.add(jtfname);
//size
p1.add(new JLabel("Select a size"));
p1.add(jcbSize);
//bread
p1.add(new JLabel("Select a Bread"));
p1.add(jcbBread);
//type
p1.add(new JLabel("What type of sub would you like?"));
p1.add(jcbtype);
//cheese
p1.add(new JLabel("Select a cheese"));
p1.add(jcbcheese);
//toasted
p1.add(new JLabel("Would you like it toasted?"));
p1.add(jcbToasted);
//toppings
p1.add(new JLabel("Select your toppings"));
p1.add(jcbLettuce);
p1.add(jcbSpinach);
p1.add(jcbPickles);
p1.add(jcbOnion);
p1.add(jcbTomatoes);
p1.add(jcbPeppers);
p1.add(jcbMayo);
p1.add(jcbMustard);
p1.add(jcbDressing);
// BUTTON PANEL
JPanel p5 = new JPanel();
p5.setLayout(new BoxLayout(p5, BoxLayout.LINE_AXIS));
p5.add(Box.createHorizontalGlue());// KEEPS THEM HORIZONTAL
p5.add(jbtExit);
p5.add(jbtAnother);
p5.add(jbtSubmit);
// ADDING PANELS AND WHERE THEY GO
add(p1, BorderLayout.NORTH);// TOP
add(p5, BorderLayout.SOUTH);// BOTTOM
// SETTING INVISIBLE BORDERS AROUND PANELS TO SPACE THEM OUT
p1.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
p5.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
// EXIT BUTTON LISTENER
jbtExit.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
System.exit(0);
}
});
// Another order BUTTON LISTENER
jbtAnother.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent arg0) {
makeASandwich();
}
});
// SUBMIT BUTTON LISTENER
jbtSubmit.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
makeASandwich();
for (Sandwich s : Sandwich.order) {
String Order = " ";
Order = jtfname.getText() + "\n"
+ "\nSize: " + s.getSize()
+ "\nType of Sub: " + s.getName()
+ "\nBread: " + s.getBread()
+ "\nCheese: " + s.getCheese()
+ "\nToasted? " + s.getToasted()
+ "\n\n---Next Order---";
JOptionPane.showMessageDialog(null, Order);
}
}
});
}
private void makeASandwich() {
Sandwich sandwich = new Sandwich(jcbtype.getItemAt(jcbtype.getSelectedIndex()));
sandwich.setBread(jcbBread.getItemAt(jcbBread.getSelectedIndex()));
sandwich.setCheese(jcbcheese.getItemAt(jcbcheese.getSelectedIndex()));
sandwich.setToasted(jcbToasted.getItemAt(jcbToasted.getSelectedIndex()));
sandwich.setSize(jcbSize.getItemAt(jcbSize.getSelectedIndex()));
// sandwich.setPrice(jcbtype.getItemAt(jcbtype.getSelectedIndex()));
Sandwich.order.add(sandwich);
}
public static void main(String[] args) {
Subway frame = new Subway();
frame.pack();
frame.setLocationRelativeTo(null); // Center the frame
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setTitle("SUBWAY");
frame.setVisible(true);
frame.setSize(600, 750);
}// ENDOFMAIN
}// ENDOFCLASS
class HoldOrder {
public static List<Sandwich> order = new ArrayList<Sandwich>();
}
class Sandwich {
String bread = "";
String sandwichName = "";
String cheese = "";
String size = "";
String toasted = "";
private double total = 0;
public static List<Sandwich> order = new ArrayList<Sandwich>();
public Sandwich(String typeOfSandwich) {
sandwichName = typeOfSandwich;
//switch(setPrice) {
//case "BLT":
// total += 3.00D;
// break;
// case "Turkey Bacon":
// total += 3.50D;
// break;
//}
}
public String getName() {
return sandwichName;
}
public void setBread(String s) {
bread = s;
}
public String getBread() {
return bread;
}
public void setCheese(String s) {
cheese = s;
}
public String getCheese() {
return cheese;
}
public void setSize(String s) {
size = s;
}
public String getSize() {
return size;
}
public void setToasted(String s) {
toasted = s;
}
public String getToasted() {
return toasted;
}
}