不能正确地从单选按钮值添加到ArrayList中 - 的Java GUI [英] Cannot properly add values to ArrayList from radio Buttons - Java GUI
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问题描述
我已经创建了一个程序，它允许用户选择餐馆的菜单项，并增加了总的每个项目创建为每个人双mealTotal的。我需要在每次进入一个新的人的时间（使用下一个人按钮）来与我曾作为一个ArrayList创建的tableTotal还添加每个mealTotal。我似乎无法获得ArrayList中添加比刚刚过去的人的mealTotal多。我需要它包括每个人的mealTotal，即，如果有4人，我tableTotal的ArrayList将举行4个独特的价值观。从这里，我想补充所有tableTotal值的拿出整个表的双重价值。在如何把每个人的mealTotal到我tableTotal ArrayList的任何帮助将是非常美联社preciated！
下面是主类：
进口javax.swing.BoxLayout中;
进口javax.swing.JFrame中;公共类MenuApp扩展的JFrame {//静态的JFrame框架;公共静态无效的主要（字符串ARGS []）{ JFrame的AFRAME =新MenuApp（）;
aFrame.setVisible（真）;}公共MenuApp（）{ 的setTitle（莉亚·汤普森的餐厅应用程序）;
setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）; 按钮buttonPanel =新按钮（）;
buttonPanel.setLayout（新的BoxLayout（buttonPanel，BoxLayout.Y_AXIS））; setContentPane（buttonPanel）;
包（）;
}
}
和按钮类：
进口java.awt.event.ActionEvent中;
进口java.awt.event.ActionListener;
进口javax.swing.ButtonGroup;
进口javax.swing.JButton中;
进口javax.swing.JFrame中;
进口javax.swing.JLabel中;
进口javax.swing.JOptionPane中;
进口javax.swing.JPanel中;
进口javax.swing.JRadioButton;
进口javax.swing.JTextField中;
进口的java.util.ArrayList;公共类按钮继承JPanel {私人最终JTextField的名称字段;的String [] = drinkChoice {可乐，啤酒，酒};
的String [] = appChoice {汤，色拉，布里};
的String [] = entreeChoice {面食，牛排，汉堡};
的String [] = dessertChoice {提拉米苏，芝士蛋糕，巧克力蛋糕};一个JRadioButton [] = drinkButtons新一个JRadioButton [drinkChoice.length]
一个JRadioButton [] = appButtons新一个JRadioButton [appChoice.length]
一个JRadioButton [] = entreeButtons新一个JRadioButton [entreeChoice.length]
一个JRadioButton [] = dessertButtons新一个JRadioButton [dessertChoice.length]ButtonGroup的buttonGroupDrink =新的ButtonGroup（）;
ButtonGroup的buttonGroupApp =新的ButtonGroup（）;
ButtonGroup的buttonGroupEntree =新的ButtonGroup（）;
ButtonGroup的buttonGroupDessert =新的ButtonGroup（）;JButton的mealCost;
JButton的nextPerson;
JButton的submitOrder;ArrayList的＆LT;双＆GT; tableTotal =新的ArrayList（0）;双mealTotal = 0;
双mealTotal1 = 0;公共按钮（）{ ActionListener的nameEntered =新NameEntered（）;
添加（新的JLabel（名称（命中输入名称后输入）））;
名称字段=新的JTextField（10）;
添加（名称字段）;
nameField.addActionListener（nameEntered）; ActionListener的drinkSelection =新DrinkSelectionChangeMade（）;
ActionListener的appSelection =新AppSelectionChangeMade（）;
ActionListener的entreeSelection =新EntreeSelectionChangeMade（）;
ActionListener的dessertSelection =新DessertSelectionChangeMade（）; 添加（新的JLabel（选择饮料））;
的for（int i = 0; I＆LT; drinkChoice.length;我++）{
drinkButtons [I] =新一个JRadioButton（drinkChoice [I]）;
drinkButtons [I] .getModel（）setActionCommand（drinkChoice [I]）。
drinkButtons [I] .addActionListener（drinkSelection）;
buttonGroupDrink.add（drinkButtons [I]）;
添加（drinkButtons [I]）;
//如果（我== 0）{
// mealTotal = mealTotal + 2;
//}否则如果（ⅰ== 1）{
// mealTotal = mealTotal + 3;
//}其他{
// mealTotal = mealTotal + 5;
//} } 添加（新的JLabel（选择开胃菜））;
的for（int i = 0; I＆LT; appChoice.length;我++）{
appButtons [I] =新一个JRadioButton（appChoice [I]）;
appButtons [I] .getModel（）setActionCommand（appChoice [I]）。
appButtons [I] .addActionListener（appSelection）;
buttonGroupApp.add（appButtons [I]）;
添加（appButtons [I]）;
//如果（我== 0）{
// mealTotal = mealTotal + 6;
//}否则如果（ⅰ== 1）{
// mealTotal = mealTotal + 7;
//}其他{
// mealTotal = mealTotal + 8;
//} } 添加（新的JLabel（选择主菜））;
的for（int i = 0; I＆LT; entreeChoice.length;我++）{
entreeButtons [I] =新一个JRadioButton（entreeChoice [I]）;
entreeButtons [I] .getModel（）setActionCommand（entreeChoice [I]）。
entreeButtons [I] .addActionListener（entreeSelection）;
buttonGroupEntree.add（entreeButtons [I]）;
添加（entreeButtons [I]）;
//如果（我== 0）{
// mealTotal = mealTotal + 12;
//}否则如果（ⅰ== 1）{
// mealTotal = mealTotal + 20;
//}其他{
// mealTotal = mealTotal + 10;
//} } 添加（新的JLabel（选择甜品））;
的for（int i = 0; I＆LT; dessertChoice.length;我++）{
dessertButtons [I] =新一个JRadioButton（dessertChoice [I]）;
dessertButtons [I] .getModel（）setActionCommand（dessertChoice [I]）。
dessertButtons [I] .addActionListener（dessertSelection）;
buttonGroupDessert.add（dessertButtons [I]）;
添加（dessertButtons [I]）;
//如果（我== 0）{
// mealTotal = mealTotal + 7;
//}否则如果（ⅰ== 1）{
// mealTotal = mealTotal + 6;
//}其他{
// mealTotal = mealTotal + 5;
//} }
mealCost =的新的JButton（膳食的总成本）;
加（mealCost）;
ActionListener的mealPrice =新MealCost pressed（）;
mealCost.addActionListener（mealPrice）; nextPerson =的新的JButton（旁边的人）;
加（nextPerson）;
接下来ActionListener的=新NextPerson pressed（）;
nextPerson.addActionListener（下）; submitOrder =的新的JButton（提交订单）;
加（submitOrder）;
ActionListener的提交=新提交pssed $ P $（）;
submitOrder.addActionListener（提交）; //tableTotal.add(mealTotal）;
//添加（新的JLabel（您一共是：+ mealTotal））;}私有类NameEntered实现的ActionListener {
@覆盖
公共无效的actionPerformed（ActionEvent的五）{
字符串名称= nameField.getText（）;
的System.out.println（名）;
}
} 私有类DrinkSelectionChangeMade实现的ActionListener { @覆盖
公共无效的actionPerformed（ActionEvent的五）{
字符串饮料= buttonGroupDrink.getSelection（）getActionCommand（）。
的System.out.println（饮+作为饮料）;
如果（==饮可乐）{
mealTotal = mealTotal + 1.95;
}
否则，如果（饮==啤酒）{
mealTotal = mealTotal + 2.95;
}
其他{
mealTotal = mealTotal + 4.95;
}
}
} 私有类AppSelectionChangeMade实现的ActionListener { @覆盖
公共无效的actionPerformed（ActionEvent的五）{
字符串app = buttonGroupApp.getSelection（）getActionCommand（）。
的System.out.println（APP +作为开胃菜）;
如果（应用程序==汤）{
mealTotal = mealTotal + 3.95;
}
否则，如果（应用程序==沙拉）{
mealTotal = mealTotal + 4.95;
}
其他{
mealTotal = mealTotal + 7.95;
}
}
}私有类EntreeSelectionChangeMade实现的ActionListener { @覆盖
公共无效的actionPerformed（ActionEvent的五）{
字符串主菜= buttonGroupEntree.getSelection（）getActionCommand（）。
的System.out.println（主菜+作为主菜）;
如果（主菜==通心粉）{
mealTotal = mealTotal + 11.95;
}
否则，如果（==主菜牛排）{
mealTotal = mealTotal + 19.95;
}
其他{
mealTotal = mealTotal + 9.95;
}
}
}私有类DessertSelectionChangeMade实现的ActionListener { @覆盖
公共无效的actionPerformed（ActionEvent的五）{
字符串甜点= buttonGroupDessert.getSelection（）getActionCommand（）。
的System.out.println（甜点+作为甜点）;
如果（甜点==提拉米苏）{
mealTotal = mealTotal + 6.95;
}
否则，如果（甜点==芝士蛋糕）{
mealTotal = mealTotal + 5.95;
}
其他{
mealTotal = mealTotal + 4.95;
}
tableTotal.add（mealTotal）;
}
}
私有类NextPerson pressed实现的ActionListener {
@覆盖
公共无效的actionPerformed（ActionEvent的五）{
//移除所有（）;
JFrame的nextFrame =新MenuApp（）;
nextFrame.setVisible（真）;
的System.out.println（下一个顾客：）;
}
}私有类MealCost pressed实现的ActionListener {
@覆盖
公共无效的actionPerformed（ActionEvent的五）{ JOptionPane.showMessageDialog（mealCost，mealTotal）;
}
}私有类提交pressed实现的ActionListener {
@覆盖
公共无效的actionPerformed（ActionEvent的五）{
JOptionPane.showMessageDialog（nextPerson，谢谢您的订单请立即退出。）;
的System.out.println（为表中的总成本是：+ tableTotal）;
}
}}
解决方案
您的问题是，你正在创建一个新MenuApp 每个人的对象，并且每个MenuApp对象都有自己的tableTotal领域。
可能的解决方案：
- 创建只是一个MenuApp对象，并改变其状态，或许一个JLabel文字，每一个新的人。
- 或者，如果你绝对要创建一个新的MenuApp每个人，那么这样做，将其放置在一个模式的JDialog，没有一个JFrame，并在对话框中完成对具有调用code查询它总与然后将其添加到tableTotal场。
I have created a program that allows a user to choose restaurant menu items and adds the total of each item creating a double mealTotal for each person. I need to also add each mealTotal every time a new person is entered(using the Next Person button) to come up with the tableTotal which I have created as an ArrayList. I cannot seem to get the arraylist to add more than just the last person's mealTotal. I need it to include every person's mealTotal, i.e., if there were 4 people, my tableTotal ArrayList would hold 4 unique values. From here, I would add all of the values in tableTotal to come up with a double value for the entire table. Any help in how to put each person's mealTotal into my tableTotal ArrayList would be much appreciated!
Here is the main class:
import javax.swing.BoxLayout;
import javax.swing.JFrame;
public class MenuApp extends JFrame {
// static JFrame frame;
public static void main(String args[]) {
JFrame aFrame = new MenuApp();
aFrame.setVisible(true);
}
public MenuApp() {
setTitle("Leah Thompson's Restaurant App");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Buttons buttonPanel = new Buttons();
buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.Y_AXIS));
setContentPane(buttonPanel);
pack();
}
}
And the Buttons class:
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.ButtonGroup;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import java.util.ArrayList;
public class Buttons extends JPanel {
private final JTextField nameField;
String[] drinkChoice = {"Coke", "Beer", "Wine"};
String[] appChoice = {"Soup", "Salad", "Brie"};
String[] entreeChoice = {"Pasta", "Steak", "Burger"};
String[] dessertChoice = {"Tiramisu", "Cheesecake", "Chocolate Cake"};
JRadioButton[] drinkButtons = new JRadioButton[drinkChoice.length];
JRadioButton[] appButtons = new JRadioButton[appChoice.length];
JRadioButton[] entreeButtons = new JRadioButton[entreeChoice.length];
JRadioButton[] dessertButtons = new JRadioButton[dessertChoice.length];
ButtonGroup buttonGroupDrink = new ButtonGroup();
ButtonGroup buttonGroupApp = new ButtonGroup();
ButtonGroup buttonGroupEntree = new ButtonGroup();
ButtonGroup buttonGroupDessert = new ButtonGroup();
JButton mealCost;
JButton nextPerson;
JButton submitOrder;
ArrayList<Double> tableTotal = new ArrayList(0);
double mealTotal = 0;
double mealTotal1 = 0;
public Buttons(){
ActionListener nameEntered = new NameEntered();
add(new JLabel("Name (hit enter after typing name)"));
nameField = new JTextField(10);
add(nameField);
nameField.addActionListener(nameEntered);
ActionListener drinkSelection = new DrinkSelectionChangeMade();
ActionListener appSelection = new AppSelectionChangeMade();
ActionListener entreeSelection = new EntreeSelectionChangeMade();
ActionListener dessertSelection = new DessertSelectionChangeMade();
add(new JLabel("Choose a Drink"));
for (int i = 0; i < drinkChoice.length; i++) {
drinkButtons[i] = new JRadioButton(drinkChoice[i]);
drinkButtons[i].getModel().setActionCommand(drinkChoice[i]);
drinkButtons[i].addActionListener(drinkSelection);
buttonGroupDrink.add(drinkButtons[i]);
add(drinkButtons[i]);
// if (i == 0) {
// mealTotal = mealTotal + 2;
// } else if (i == 1) {
// mealTotal = mealTotal + 3;
// } else {
// mealTotal = mealTotal + 5;
// }
}
add(new JLabel("Choose an Appetizer"));
for (int i = 0; i < appChoice.length; i++) {
appButtons[i] = new JRadioButton(appChoice[i]);
appButtons[i].getModel().setActionCommand(appChoice[i]);
appButtons[i].addActionListener(appSelection);
buttonGroupApp.add(appButtons[i]);
add(appButtons[i]);
// if (i == 0) {
// mealTotal = mealTotal + 6;
// } else if (i == 1) {
// mealTotal = mealTotal + 7;
// } else {
// mealTotal = mealTotal + 8;
// }
}
add(new JLabel("Choose an Entree"));
for (int i = 0; i < entreeChoice.length; i++) {
entreeButtons[i] = new JRadioButton(entreeChoice[i]);
entreeButtons[i].getModel().setActionCommand(entreeChoice[i]);
entreeButtons[i].addActionListener(entreeSelection);
buttonGroupEntree.add(entreeButtons[i]);
add(entreeButtons[i]);
// if (i == 0) {
// mealTotal = mealTotal + 12;
// } else if (i == 1) {
// mealTotal = mealTotal + 20;
// } else {
// mealTotal = mealTotal + 10;
// }
}
add(new JLabel("Choose a Dessert"));
for (int i = 0; i < dessertChoice.length; i++) {
dessertButtons[i] = new JRadioButton(dessertChoice[i]);
dessertButtons[i].getModel().setActionCommand(dessertChoice[i]);
dessertButtons[i].addActionListener(dessertSelection);
buttonGroupDessert.add(dessertButtons[i]);
add(dessertButtons[i]);
// if (i == 0) {
// mealTotal = mealTotal + 7;
// } else if (i == 1) {
// mealTotal = mealTotal + 6;
// } else {
// mealTotal = mealTotal + 5;
// }
}
mealCost = new JButton("Total Cost of Meal");
add(mealCost);
ActionListener mealPrice = new MealCostPressed();
mealCost.addActionListener(mealPrice);
nextPerson = new JButton("Next Person");
add(nextPerson);
ActionListener next = new NextPersonPressed();
nextPerson.addActionListener(next);
submitOrder = new JButton("Submit Order");
add(submitOrder);
ActionListener submit = new SubmitPressed();
submitOrder.addActionListener(submit);
//tableTotal.add(mealTotal);
//add(new JLabel("Your total is: " + mealTotal));
}
private class NameEntered implements ActionListener{
@Override
public void actionPerformed(ActionEvent e){
String name = nameField.getText();
System.out.println(name);
}
}
private class DrinkSelectionChangeMade implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
String drink = buttonGroupDrink.getSelection().getActionCommand();
System.out.println(drink + " as a drink");
if(drink == "Coke"){
mealTotal = mealTotal + 1.95;
}
else if(drink == "Beer"){
mealTotal = mealTotal + 2.95;
}
else{
mealTotal = mealTotal + 4.95;
}
}
}
private class AppSelectionChangeMade implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
String app = buttonGroupApp.getSelection().getActionCommand();
System.out.println(app + " as an appetizer");
if(app == "Soup"){
mealTotal = mealTotal + 3.95;
}
else if(app == "Salad"){
mealTotal = mealTotal + 4.95;
}
else{
mealTotal = mealTotal + 7.95;
}
}
}
private class EntreeSelectionChangeMade implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
String entree = buttonGroupEntree.getSelection().getActionCommand();
System.out.println(entree + " as an entree");
if(entree == "Pasta"){
mealTotal = mealTotal + 11.95;
}
else if(entree == "Steak"){
mealTotal = mealTotal + 19.95;
}
else{
mealTotal = mealTotal + 9.95;
}
}
}
private class DessertSelectionChangeMade implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
String dessert = buttonGroupDessert.getSelection().getActionCommand();
System.out.println(dessert + " as a dessert");
if(dessert == "Tiramisu"){
mealTotal = mealTotal + 6.95;
}
else if(dessert == "Cheesecake"){
mealTotal = mealTotal + 5.95;
}
else{
mealTotal = mealTotal + 4.95;
}
tableTotal.add(mealTotal);
}
}
private class NextPersonPressed implements ActionListener{
@Override
public void actionPerformed(ActionEvent e){
//removeAll();
JFrame nextFrame = new MenuApp();
nextFrame.setVisible(true);
System.out.println("Next Customer: ");
}
}
private class MealCostPressed implements ActionListener{
@Override
public void actionPerformed(ActionEvent e){
JOptionPane.showMessageDialog(mealCost, mealTotal);
}
}
private class SubmitPressed implements ActionListener{
@Override
public void actionPerformed(ActionEvent e){
JOptionPane.showMessageDialog(nextPerson, "Thank you for your order. Please Exit Now.");
System.out.println("The total cost for the table is: " + tableTotal);
}
}
}
解决方案
Your problem is that you're creating a new MenuApp object for each person, and each MenuApp object has its own tableTotal field.
Possible solutions:
- Create just one MenuApp object and change its state, perhaps the text on a JLabel, for each new person.
- Or if you absolutely have to create a new MenuApp for each person, then do so, place it in a modal JDialog, not a JFrame, and when the dialog completes have the calling code query it for its total and then add it to a tableTotal field.
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