正如我的上一个问题，我声明我对编码非常陌生，Java 是我当前唯一的语言。
我正在 eclipse 中构建我的第一个完全独立的项目，使用大量 Java 导入。
这是一个 POS 收银机系统，它有 24 个菜单项按钮，这些按钮通过以包含空值的字符串开头来标记。
我有一个管理面板，从这个面板我可以更新与菜单项按钮关联的标题和价格。
当我单击与该特定菜单项按钮相关的“设置”按钮时，项目名称和价格的字符串和 double 值会正确更新，但 JButton 上打印的标题不会更改。
请问我做错了什么/遗漏了什么？
代码如下:
public class Background implements ActionListener {
double menitprice1 = 0.0;
double menitprice2 = 0.0;
double menitprice3 = 0.0;
double menitprice4 = 0.0;
double menitprice5 = 0.0;
double menitprice6 = 0.0;
double menitprice7 = 0.0;
double menitprice8 = 0.0;
double menitprice9 = 0.0;
double menitprice10 = 0.0;
double menitprice11 = 0.0;
double menitprice12 = 0.0;
double menitprice13 = 0.0;
double menitprice14 = 0.0;
double menitprice15 = 0.0;
double menitprice16 = 0.0;
double menitprice17 = 0.0;
double menitprice18 = 0.0;
double menitprice19 = 0.0;
double menitprice20 = 0.0;
double menitprice21 = 0.0;
double menitprice22 = 0.0;
double menitprice23 = 0.0;
double menitprice24 = 0.0;
String menit1;
String menit2;
String menit3;
String menit4;
String menit5;
String menit6;
String menit7;
String menit8;
String menit9;
String menit10;
String menit11;
String menit12;
String menit13;
String menit14;
String menit15;
String menit16;
String menit17;
String menit18;
String menit19;
String menit20;
String menit21;
String menit22;
String menit23;
String menit24;
String adminPassword = "Password";
int splitParty;
JFrame mainFrame = new JFrame();
JFrame adminFrame = new JFrame();
JFrame payFrame = new JFrame();
JFrame splitFrame = new JFrame();
JFrame loginFrame = new JFrame();
Panel mainPanel = new Panel();
Panel adminPanel = new Panel();
Panel payPanel = new Panel();
Panel splitPanel = new Panel();
Panel loginPanel = new Panel();
JTextArea summaryList = new JTextArea();
JTextArea summaryListTotal = new JTextArea();
JTextArea dueAmount = new JTextArea();
JTextArea splitAmount = new JTextArea("How many people?");
JTextArea totalSplits = new JTextArea();
JTextArea splitInput = new JTextArea();
JTextArea logInPassword = new JTextArea();
JTextArea itemsList = new JTextArea("Menu item:");
JTextArea list1 = new JTextArea("Item 1");
JTextArea list2 = new JTextArea("Item 2");
JTextArea list3 = new JTextArea("Item 3");
JTextArea list4 = new JTextArea("Item 4");
JTextArea list5 = new JTextArea("Item 5");
JTextArea list6 = new JTextArea("Item 6");
JTextArea list7 = new JTextArea("Item 7");
JTextArea list8 = new JTextArea("Item 8");
JTextArea list9 = new JTextArea("Item 9");
JTextArea list10 = new JTextArea("Item 10");
JTextArea list11 = new JTextArea("Item 11");
JTextArea list12 = new JTextArea("Item 12");
JTextArea list13 = new JTextArea("Item 13");
JTextArea list14 = new JTextArea("Item 14");
JTextArea list15 = new JTextArea("Item 15");
JTextArea list16 = new JTextArea("Item 16");
JTextArea list17 = new JTextArea("Item 17");
JTextArea list18 = new JTextArea("Item 18");
JTextArea list19 = new JTextArea("Item 19");
JTextArea list20 = new JTextArea("Item 20");
JTextArea list21 = new JTextArea("Item 21");
JTextArea list22 = new JTextArea("Item 22");
JTextArea list23 = new JTextArea("Item 23");
JTextArea list24 = new JTextArea("Item 24");
JTextArea itemIs = new JTextArea("Item Name");
JTextArea price = new JTextArea("Price");
JTextArea setItem1 = new JTextArea(menit1);
JTextArea setItem2 = new JTextArea(menit2);
JTextArea setItem3 = new JTextArea(menit3);
JTextArea setItem4 = new JTextArea(menit4);
JTextArea setItem5 = new JTextArea(menit5);
JTextArea setItem6 = new JTextArea(menit6);
JTextArea setItem7 = new JTextArea(menit7);
JTextArea setItem8 = new JTextArea(menit8);
JTextArea setItem9 = new JTextArea(menit9);
JTextArea setItem10 = new JTextArea(menit10);
JTextArea setItem11 = new JTextArea(menit11);
JTextArea setItem12 = new JTextArea(menit12);
JTextArea setItem13 = new JTextArea(menit13);
JTextArea setItem14 = new JTextArea(menit14);
JTextArea setItem15 = new JTextArea(menit15);
JTextArea setItem16 = new JTextArea(menit16);
JTextArea setItem17 = new JTextArea(menit17);
JTextArea setItem18 = new JTextArea(menit18);
JTextArea setItem19 = new JTextArea(menit19);
JTextArea setItem20 = new JTextArea(menit20);
JTextArea setItem21 = new JTextArea(menit21);
JTextArea setItem22 = new JTextArea(menit22);
JTextArea setItem23 = new JTextArea(menit23);
JTextArea setItem24 = new JTextArea(menit24);
JTextArea setPrice1 = new JTextArea(String.valueOf(menitprice1));
JTextArea setPrice2 = new JTextArea(String.valueOf(menitprice2));
JTextArea setPrice3 = new JTextArea(String.valueOf(menitprice3));
JTextArea setPrice4 = new JTextArea(String.valueOf(menitprice4));
JTextArea setPrice5 = new JTextArea(String.valueOf(menitprice5));
JTextArea setPrice6 = new JTextArea(String.valueOf(menitprice6));
JTextArea setPrice7 = new JTextArea(String.valueOf(menitprice7));
JTextArea setPrice8 = new JTextArea(String.valueOf(menitprice8));
JTextArea setPrice9 = new JTextArea(String.valueOf(menitprice9));
JTextArea setPrice10 = new JTextArea(String.valueOf(menitprice10));
JTextArea setPrice11 = new JTextArea(String.valueOf(menitprice11));
JTextArea setPrice12 = new JTextArea(String.valueOf(menitprice12));
JTextArea setPrice13 = new JTextArea(String.valueOf(menitprice13));
JTextArea setPrice14 = new JTextArea(String.valueOf(menitprice14));
JTextArea setPrice15 = new JTextArea(String.valueOf(menitprice15));
JTextArea setPrice16 = new JTextArea(String.valueOf(menitprice16));
JTextArea setPrice17 = new JTextArea(String.valueOf(menitprice17));
JTextArea setPrice18 = new JTextArea(String.valueOf(menitprice18));
JTextArea setPrice19 = new JTextArea(String.valueOf(menitprice19));
JTextArea setPrice20 = new JTextArea(String.valueOf(menitprice20));
JTextArea setPrice21 = new JTextArea(String.valueOf(menitprice21));
JTextArea setPrice22 = new JTextArea(String.valueOf(menitprice22));
JTextArea setPrice23 = new JTextArea(String.valueOf(menitprice23));
JTextArea setPrice24 = new JTextArea(String.valueOf(menitprice24));
JButton menuItem1 = new JButton(menit1 + " " + menitprice1);
JButton menuItem2 = new JButton(menit2 + " " + menitprice2);
JButton menuItem3 = new JButton(menit3 + " " + menitprice3);
JButton menuItem4 = new JButton(menit4 + " " + menitprice4);
JButton menuItem5 = new JButton(menit5 + " " + menitprice5);
JButton menuItem6 = new JButton(menit6 + " " + menitprice6);
JButton menuItem7 = new JButton(menit7 + " " + menitprice7);
JButton menuItem8 = new JButton(menit8 + " " + menitprice8);
JButton menuItem9 = new JButton(menit9 + " " + menitprice9);
JButton menuItem10 = new JButton(menit10 + " " + menitprice10);
JButton menuItem11 = new JButton(menit11 + " " + menitprice11);
JButton menuItem12 = new JButton(menit12 + " " + menitprice12);
JButton menuItem13 = new JButton(menit13 + " " + menitprice13);
JButton menuItem14 = new JButton(menit14 + " " + menitprice14);
JButton menuItem15 = new JButton(menit15 + " " + menitprice15);
JButton menuItem16 = new JButton(menit16 + " " + menitprice16);
JButton menuItem17 = new JButton(menit17 + " " + menitprice17);
JButton menuItem18 = new JButton(menit18 + " " + menitprice18);
JButton menuItem19 = new JButton(menit19 + " " + menitprice19);
JButton menuItem20 = new JButton(menit20 + " " + menitprice20);
JButton menuItem21 = new JButton(menit21 + " " + menitprice21);
JButton menuItem22 = new JButton(menit22 + " " + menitprice22);
JButton menuItem23 = new JButton(menit23 + " " + menitprice23);
JButton menuItem24 = new JButton(menit24 + " " + menitprice24);
JButton adminButton = new JButton("Admin Control");
JButton payButton = new JButton("Payment");
JButton cashOpt = new JButton("Cash");
JButton cardOpt = new JButton("Card");
JButton splitOpt = new JButton("Split Payment");
JButton splitCancel = new JButton("Cancel");
JButton splitSubmit = new JButton("Split it");
JButton passwordSubmit = new JButton("Log in");
JButton menItSet1 = new JButton("set");
JButton menItSet2 = new JButton("set");
JButton menItSet3 = new JButton("set");
JButton menItSet4 = new JButton("set");
JButton menItSet5 = new JButton("set");
JButton menItSet6 = new JButton("set");
JButton menItSet7 = new JButton("set");
JButton menItSet8 = new JButton("set");
JButton menItSet9 = new JButton("set");
JButton menItSet10 = new JButton("set");
JButton menItSet11 = new JButton("set");
JButton menItSet12 = new JButton("set");
JButton menItSet13 = new JButton("set");
JButton menItSet14 = new JButton("set");
JButton menItSet15 = new JButton("set");
JButton menItSet16 = new JButton("set");
JButton menItSet17 = new JButton("set");
JButton menItSet18 = new JButton("set");
JButton menItSet19 = new JButton("set");
JButton menItSet20 = new JButton("set");
JButton menItSet21 = new JButton("set");
JButton menItSet22 = new JButton("set");
JButton menItSet23 = new JButton("set");
JButton menItSet24 = new JButton("set");
public Background() {
Border listBorder = BorderFactory.createLineBorder(Color.RED, 3);
Font listFont = new Font("ariel", Font.BOLD, 27);
// Admin Log in
loginFrame.setVisible(false);
loginFrame.setTitle("Indy POS: Admin log in");
loginFrame.setSize(400, 200);
loginFrame.setResizable(false);
loginFrame.add(loginPanel);
loginPanel.setBackground(Color.lightGray);
loginPanel.setLayout(null);
loginPanel.add(logInPassword);
logInPassword.setBounds(100, 50, 200, 50);
logInPassword.setBorder(listBorder);
logInPassword.setFont(listFont);
logInPassword.setBackground(Color.white);
logInPassword.setForeground(Color.lightGray);
loginPanel.add(passwordSubmit);
passwordSubmit.setBounds(125, 112, 150, 50);
passwordSubmit.addActionListener(this);
// Admin area
adminFrame.setVisible(false);
adminFrame.setTitle("Indy POS: Admin Control");
adminFrame.setSize(850, 750);
adminFrame.add(adminPanel);
adminPanel.setBackground(Color.lightGray);
adminPanel.setLayout(null);
adminPanel.add(list1);
list1.setEditable(false);
list1.setBackground(Color.lightGray);
list1.setBorder(listBorder);
list1.setBounds(50, 25, 50, 25);
adminPanel.add(list2);
list2.setEditable(false);
list2.setBackground(Color.lightGray);
list2.setBorder(listBorder);
list2.setBounds(50, 50, 50, 25);
adminPanel.add(list3);
list3.setEditable(false);
list3.setBackground(Color.lightGray);
list3.setBorder(listBorder);
list3.setBounds(50, 75, 50, 25);
adminPanel.add(list4);
list4.setEditable(false);
list4.setBackground(Color.lightGray);
list4.setBorder(listBorder);
list4.setBounds(50, 100, 50, 25);
adminPanel.add(list5);
list5.setEditable(false);
list5.setBackground(Color.lightGray);
list5.setBorder(listBorder);
list5.setBounds(50, 125, 50, 25);
adminPanel.add(list6);
list6.setEditable(false);
list6.setBackground(Color.lightGray);
list6.setBorder(listBorder);
list6.setBounds(50, 150, 50, 25);
adminPanel.add(list7);
list7.setEditable(false);
list7.setBackground(Color.lightGray);
list7.setBorder(listBorder);
list7.setBounds(50, 175, 50, 25);
adminPanel.add(list8);
list8.setEditable(false);
list8.setBackground(Color.lightGray);
list8.setBorder(listBorder);
list8.setBounds(50, 200, 50, 25);
adminPanel.add(list9);
list9.setEditable(false);
list9.setBackground(Color.lightGray);
list9.setBorder(listBorder);
list9.setBounds(50, 225, 50, 25);
adminPanel.add(list10);
list10.setEditable(false);
list10.setBackground(Color.lightGray);
list10.setBorder(listBorder);
list10.setBounds(50, 250, 50, 25);
adminPanel.add(list11);
list11.setEditable(false);
list11.setBackground(Color.lightGray);
list11.setBorder(listBorder);
list11.setBounds(50, 275, 50, 25);
adminPanel.add(list12);
list12.setEditable(false);
list12.setBackground(Color.lightGray);
list12.setBorder(listBorder);
list12.setBounds(50, 300, 50, 25);
adminPanel.add(list13);
list13.setEditable(false);
list13.setBackground(Color.lightGray);
list13.setBorder(listBorder);
list13.setBounds(50, 325, 50, 25);
adminPanel.add(list14);
list14.setEditable(false);
list14.setBackground(Color.lightGray);
list14.setBorder(listBorder);
list14.setBounds(50, 350, 50, 25);
adminPanel.add(list15);
list15.setEditable(false);
list15.setBackground(Color.lightGray);
list15.setBorder(listBorder);
list15.setBounds(50, 375, 50, 25);
adminPanel.add(list16);
list16.setEditable(false);
list16.setBackground(Color.lightGray);
list16.setBorder(listBorder);
list16.setBounds(50, 400, 50, 25);
adminPanel.add(list17);
list17.setEditable(false);
list17.setBackground(Color.lightGray);
list17.setBorder(listBorder);
list17.setBounds(50, 425, 50, 25);
adminPanel.add(list18);
list18.setEditable(false);
list18.setBackground(Color.lightGray);
list18.setBorder(listBorder);
list18.setBounds(50, 450, 50, 25);
adminPanel.add(list19);
list19.setEditable(false);
list19.setBackground(Color.lightGray);
list19.setBorder(listBorder);
list19.setBounds(50, 475, 50, 25);
adminPanel.add(list20);
list20.setEditable(false);
list20.setBackground(Color.lightGray);
list20.setBorder(listBorder);
list20.setBounds(50, 500, 50, 25);
adminPanel.add(list21);
list21.setEditable(false);
list21.setBackground(Color.lightGray);
list21.setBorder(listBorder);
list21.setBounds(50, 525, 50, 25);
adminPanel.add(list22);
list22.setEditable(false);
list22.setBackground(Color.lightGray);
list22.setBorder(listBorder);
list22.setBounds(50, 550, 50, 25);
adminPanel.add(list23);
list23.setEditable(false);
list23.setBackground(Color.lightGray);
list23.setBorder(listBorder);
list23.setBounds(50, 575, 50, 25);
adminPanel.add(list24);
list24.setEditable(false);
list24.setBackground(Color.lightGray);
list24.setBorder(listBorder);
list24.setBounds(50, 600, 50, 25);
adminPanel.add(itemIs);
itemIs.setEditable(false);
itemIs.setBackground(Color.lightGray);
itemIs.setBounds(150, 0, 150, 25);
adminPanel.add(price);
price.setEditable(false);
price.setBackground(Color.lightGray);
price.setBounds(350, 0, 150, 25);
adminPanel.add(setItem1);
setItem1.setBorder(listBorder);
setItem1.setBounds(150, 25, 150, 25);
adminPanel.add(setItem2);
setItem2.setBorder(listBorder);
setItem2.setBounds(150, 50, 150, 25);
adminPanel.add(setItem3);
setItem3.setBorder(listBorder);
setItem3.setBounds(150, 75, 150, 25);
adminPanel.add(setItem4);
setItem4.setBorder(listBorder);
setItem4.setBounds(150, 100, 150, 25);
adminPanel.add(setItem5);
setItem5.setBorder(listBorder);
setItem5.setBounds(150, 125, 150, 25);
adminPanel.add(setItem6);
setItem6.setBorder(listBorder);
setItem6.setBounds(150, 150, 150, 25);
adminPanel.add(setItem7);
setItem7.setBorder(listBorder);
setItem7.setBounds(150, 175, 150, 25);
adminPanel.add(setItem8);
setItem8.setBorder(listBorder);
setItem8.setBounds(150, 200, 150, 25);
adminPanel.add(setItem9);
setItem9.setBorder(listBorder);
setItem9.setBounds(150, 225, 150, 25);
adminPanel.add(setItem10);
setItem10.setBorder(listBorder);
setItem10.setBounds(150, 250, 150, 25);
adminPanel.add(setItem11);
setItem11.setBorder(listBorder);
setItem11.setBounds(150, 275, 150, 25);
adminPanel.add(setItem12);
setItem12.setBorder(listBorder);
setItem12.setBounds(150, 300, 150, 25);
adminPanel.add(setItem13);
setItem13.setBorder(listBorder);
setItem13.setBounds(150, 325, 150, 25);
adminPanel.add(setItem14);
setItem14.setBorder(listBorder);
setItem14.setBounds(150, 350, 150, 25);
adminPanel.add(setItem15);
setItem15.setBorder(listBorder);
setItem15.setBounds(150, 375, 150, 25);
adminPanel.add(setItem16);
setItem16.setBorder(listBorder);
setItem16.setBounds(150, 400, 150, 25);
adminPanel.add(setItem17);
setItem17.setBorder(listBorder);
setItem17.setBounds(150, 425, 150, 25);
adminPanel.add(setItem18);
setItem18.setBorder(listBorder);
setItem18.setBounds(150, 450, 150, 25);
adminPanel.add(setItem19);
setItem19.setBorder(listBorder);
setItem19.setBounds(150, 475, 150, 25);
adminPanel.add(setItem20);
setItem20.setBorder(listBorder);
setItem20.setBounds(150, 500, 150, 25);
adminPanel.add(setItem21);
setItem21.setBorder(listBorder);
setItem21.setBounds(150, 525, 150, 25);
adminPanel.add(setItem22);
setItem22.setBorder(listBorder);
setItem22.setBounds(150, 550, 150, 25);
adminPanel.add(setItem23);
setItem23.setBorder(listBorder);
setItem23.setBounds(150, 575, 150, 25);
adminPanel.add(setItem24);
setItem24.setBorder(listBorder);
setItem24.setBounds(150, 600, 150, 25);
adminPanel.add(setPrice1);
setPrice1.setBorder(listBorder);
setPrice1.setBounds(350, 25, 150, 25);
adminPanel.add(setPrice2);
setPrice2.setBorder(listBorder);
setPrice2.setBounds(350, 50, 150, 25);
adminPanel.add(setPrice3);
setPrice3.setBorder(listBorder);
setPrice3.setBounds(350, 75, 150, 25);
adminPanel.add(setPrice4);
setPrice4.setBorder(listBorder);
setPrice4.setBounds(350, 100, 150, 25);
adminPanel.add(setPrice5);
setPrice5.setBorder(listBorder);
setPrice5.setBounds(350, 125, 150, 25);
adminPanel.add(setPrice6);
setPrice6.setBorder(listBorder);
setPrice6.setBounds(350, 150, 150, 25);
adminPanel.add(setPrice7);
setPrice7.setBorder(listBorder);
setPrice7.setBounds(350, 175, 150, 25);
adminPanel.add(setPrice8);
setPrice8.setBorder(listBorder);
setPrice8.setBounds(350, 200, 150, 25);
adminPanel.add(setPrice9);
setPrice9.setBorder(listBorder);
setPrice9.setBounds(350, 225, 150, 25);
adminPanel.add(setPrice10);
setPrice10.setBorder(listBorder);
setPrice10.setBounds(350, 250, 150, 25);
adminPanel.add(setPrice11);
setPrice11.setBorder(listBorder);
setPrice11.setBounds(350, 275, 150, 25);
adminPanel.add(setPrice12);
setPrice12.setBorder(listBorder);
setPrice12.setBounds(350, 300, 150, 25);
adminPanel.add(setPrice13);
setPrice13.setBorder(listBorder);
setPrice13.setBounds(350, 325, 150, 25);
adminPanel.add(setPrice14);
setPrice14.setBorder(listBorder);
setPrice14.setBounds(350, 350, 150, 25);
adminPanel.add(setPrice15);
setPrice15.setBorder(listBorder);
setPrice15.setBounds(350, 375, 150, 25);
adminPanel.add(setPrice16);
setPrice16.setBorder(listBorder);
setPrice16.setBounds(350, 400, 150, 25);
adminPanel.add(setPrice17);
setPrice17.setBorder(listBorder);
setPrice17.setBounds(350, 425, 150, 25);
adminPanel.add(setPrice18);
setPrice18.setBorder(listBorder);
setPrice18.setBounds(350, 450, 150, 25);
adminPanel.add(setPrice19);
setPrice19.setBorder(listBorder);
setPrice19.setBounds(350, 475, 150, 25);
adminPanel.add(setPrice20);
setPrice20.setBorder(listBorder);
setPrice20.setBounds(350, 500, 150, 25);
adminPanel.add(setPrice21);
setPrice21.setBorder(listBorder);
setPrice21.setBounds(350, 525, 150, 25);
adminPanel.add(setPrice22);
setPrice22.setBorder(listBorder);
setPrice22.setBounds(350, 550, 150, 25);
adminPanel.add(setPrice23);
setPrice23.setBorder(listBorder);
setPrice23.setBounds(350, 575, 150, 25);
adminPanel.add(setPrice24);
setPrice24.setBorder(listBorder);
setPrice24.setBounds(350, 600, 150, 25);
adminPanel.add(menItSet1);
menItSet1.setBounds(550, 25, 100, 25);
adminPanel.add(menItSet2);
menItSet2.setBounds(550, 50, 100, 25);
adminPanel.add(menItSet3);
menItSet3.setBounds(550, 75, 100, 25);
adminPanel.add(menItSet4);
menItSet4.setBounds(550, 100, 100, 25);
adminPanel.add(menItSet5);
menItSet5.setBounds(550, 125, 100, 25);
adminPanel.add(menItSet6);
menItSet6.setBounds(550, 150, 100, 25);
adminPanel.add(menItSet7);
menItSet7.setBounds(550, 175, 100, 25);
adminPanel.add(menItSet8);
menItSet8.setBounds(550, 200, 100, 25);
adminPanel.add(menItSet9);
menItSet9.setBounds(550, 225, 100, 25);
adminPanel.add(menItSet10);
menItSet10.setBounds(550, 250, 100, 25);
adminPanel.add(menItSet11);
menItSet11.setBounds(550, 275, 100, 25);
adminPanel.add(menItSet12);
menItSet12.setBounds(550, 300, 100, 25);
adminPanel.add(menItSet13);
menItSet13.setBounds(550, 325, 100, 25);
adminPanel.add(menItSet14);
menItSet14.setBounds(550, 350, 100, 25);
adminPanel.add(menItSet15);
menItSet15.setBounds(550, 375, 100, 25);
adminPanel.add(menItSet16);
menItSet16.setBounds(550, 400, 100, 25);
adminPanel.add(menItSet17);
menItSet17.setBounds(550, 425, 100, 25);
adminPanel.add(menItSet18);
menItSet18.setBounds(550, 450, 100, 25);
adminPanel.add(menItSet19);
menItSet19.setBounds(550, 475, 100, 25);
adminPanel.add(menItSet20);
menItSet20.setBounds(550, 500, 100, 25);
adminPanel.add(menItSet21);
menItSet21.setBounds(550, 525, 100, 25);
adminPanel.add(menItSet22);
menItSet22.setBounds(550, 550, 100, 25);
adminPanel.add(menItSet23);
menItSet23.setBounds(550, 575, 100, 25);
adminPanel.add(menItSet24);
menItSet24.setBounds(550, 600, 100, 25);
menItSet1.addActionListener(this);
menItSet2.addActionListener(this);
menItSet3.addActionListener(this);
menItSet4.addActionListener(this);
menItSet5.addActionListener(this);
menItSet6.addActionListener(this);
menItSet7.addActionListener(this);
menItSet8.addActionListener(this);
menItSet9.addActionListener(this);
menItSet10.addActionListener(this);
menItSet11.addActionListener(this);
menItSet12.addActionListener(this);
menItSet13.addActionListener(this);
menItSet14.addActionListener(this);
menItSet15.addActionListener(this);
menItSet16.addActionListener(this);
menItSet17.addActionListener(this);
menItSet18.addActionListener(this);
menItSet19.addActionListener(this);
menItSet20.addActionListener(this);
menItSet21.addActionListener(this);
menItSet22.addActionListener(this);
menItSet23.addActionListener(this);
menItSet24.addActionListener(this);
//Payment area
payFrame.setVisible(false);
payFrame.setTitle("Indy POS: Payment");
payFrame.setSize(600, 300);
payFrame.setResizable(false);
payFrame.add(payPanel);
payPanel.setBackground(Color.lightGray);
payPanel.setLayout(null);
payPanel.add(dueAmount);
dueAmount.setBounds(100, 50, 250, 100);
dueAmount.setBorder(listBorder);
dueAmount.setFont(listFont);
dueAmount.setBackground(Color.BLACK);
dueAmount.setForeground(Color.WHITE);
dueAmount.setEditable(false);
payPanel.add(totalSplits);
totalSplits.setBounds(400, 50, 150, 100);
totalSplits.setBorder(listBorder);
totalSplits.setFont(listFont);
totalSplits.setBackground(Color.BLACK);
totalSplits.setForeground(Color.WHITE);
totalSplits.setEditable(false);
payPanel.add(cashOpt);
cashOpt.setBounds(100, 200, 100, 50);
payPanel.add(cardOpt);
cardOpt.setBounds(250, 200, 100, 50);
payPanel.add(splitOpt);
splitOpt.setBounds(400, 200, 150, 50);
cashOpt.addActionListener(this);
cardOpt.addActionListener(this);
splitOpt.addActionListener(this);
// Split area
splitFrame.setVisible(false);
splitFrame.setTitle("Indy POS: Split Order");
splitFrame.setSize(450, 200);
splitFrame.setResizable(false);
splitFrame.add(splitPanel);
splitPanel.setLayout(null);
splitPanel.setBackground(Color.lightGray);
splitPanel.add(splitAmount);
splitAmount.setBounds(20, 25, 260, 47);
splitAmount.setEditable(false);
splitAmount.setBackground(Color.lightGray);
splitAmount.setFont(listFont);
splitAmount.setForeground(Color.BLACK);
splitPanel.add(splitInput);
splitInput.setBorder(listBorder);
splitInput.setFont(listFont);
splitInput.setBackground(Color.BLACK);
splitInput.setForeground(Color.WHITE);
splitInput.setBounds(100, 75, 100, 50);
splitPanel.add(splitSubmit);
splitSubmit.setBounds(250, 75, 100, 50);
splitPanel.add(splitCancel);
splitCancel.setBounds(100, 175, 100, 50);
// Cash area
// Card area
// Main area
mainFrame.setVisible(true);
mainFrame.setTitle("Indy POS");
mainFrame.setSize(1000, 750);
mainFrame.setResizable(false);
mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mainFrame.add(mainPanel);
mainPanel.setBackground(Color.lightGray);
mainPanel.setLayout(null);
mainPanel.add(summaryList);
summaryList.setBounds(100, 50, 300, 575);
summaryList.setBorder(listBorder);
summaryList.setBackground(Color.BLACK);
summaryList.setEditable(false);
summaryList.setFont(listFont);
summaryList.setForeground(Color.WHITE);
mainPanel.add(summaryListTotal);
summaryListTotal.setBounds(100, 650, 150, 50);
summaryListTotal.setBorder(listBorder);
summaryListTotal.setBackground(Color.BLACK);
summaryListTotal.setEditable(false);
summaryListTotal.setFont(listFont);
summaryListTotal.setForeground(Color.WHITE);
mainPanel.add(payButton);
payButton.setBounds(300, 650, 100, 50);
mainPanel.add(menuItem1);
menuItem1.setBounds(500, 50, 100, 50);
mainPanel.add(menuItem2);
menuItem2.setBounds(650, 50, 100, 50);
mainPanel.add(menuItem3);
menuItem3.setBounds(800, 50, 100, 50);
mainPanel.add(menuItem4);
menuItem4.setBounds(500, 125, 100, 50);
mainPanel.add(menuItem5);
menuItem5.setBounds(650, 125, 100, 50);
mainPanel.add(menuItem6);
menuItem6.setBounds(800, 125, 100, 50);
mainPanel.add(menuItem7);
menuItem7.setBounds(500, 200, 100, 50);
mainPanel.add(menuItem8);
menuItem8.setBounds(650, 200, 100, 50);
mainPanel.add(menuItem9);
menuItem9.setBounds(800, 200, 100, 50);
mainPanel.add(menuItem10);
menuItem10.setBounds(500, 275, 100, 50);
mainPanel.add(menuItem11);
menuItem11.setBounds(650, 275, 100, 50);
mainPanel.add(menuItem12);
menuItem12.setBounds(800, 275, 100, 50);
mainPanel.add(menuItem13);
menuItem13.setBounds(500, 350, 100, 50);
mainPanel.add(menuItem14);
menuItem14.setBounds(650, 350, 100, 50);
mainPanel.add(menuItem15);
menuItem15.setBounds(800, 350, 100, 50);
mainPanel.add(menuItem16);
menuItem16.setBounds(500, 425, 100, 50);
mainPanel.add(menuItem17);
menuItem17.setBounds(650, 425, 100, 50);
mainPanel.add(menuItem18);
menuItem18.setBounds(800, 425, 100, 50);
mainPanel.add(menuItem19);
menuItem19.setBounds(500, 500, 100, 50);
mainPanel.add(menuItem20);
menuItem20.setBounds(650, 500, 100, 50);
mainPanel.add(menuItem21);
menuItem21.setBounds(800, 500, 100, 50);
mainPanel.add(menuItem22);
menuItem22.setBounds(500, 575, 100, 50);
mainPanel.add(menuItem23);
menuItem23.setBounds(650, 575, 100, 50);
mainPanel.add(menuItem24);
menuItem24.setBounds(800, 575, 100, 50);
mainPanel.add(adminButton);
adminButton.setBounds(750, 650, 150, 50);
menuItem1.addActionListener(this);
menuItem2.addActionListener(this);
menuItem3.addActionListener(this);
menuItem4.addActionListener(this);
menuItem5.addActionListener(this);
menuItem6.addActionListener(this);
menuItem7.addActionListener(this);
menuItem8.addActionListener(this);
menuItem9.addActionListener(this);
menuItem10.addActionListener(this);
menuItem11.addActionListener(this);
menuItem12.addActionListener(this);
menuItem13.addActionListener(this);
menuItem14.addActionListener(this);
menuItem15.addActionListener(this);
menuItem16.addActionListener(this);
menuItem17.addActionListener(this);
menuItem18.addActionListener(this);
menuItem19.addActionListener(this);
menuItem20.addActionListener(this);
menuItem21.addActionListener(this);
menuItem22.addActionListener(this);
menuItem23.addActionListener(this);
menuItem24.addActionListener(this);
adminButton.addActionListener(this);
payButton.addActionListener(this);
}
public void actionPerformed(ActionEvent e) {
Object source = e.getSource();
if (source == payButton){
payFrame.setVisible(true);
}
if (source == splitOpt){
splitFrame.setVisible(true);
}
if (source == adminButton){
loginFrame.setVisible(true);
splitFrame.setVisible(false);
payFrame.setVisible(false);
}
if (source == passwordSubmit){
if (logInPassword.getText().equals(adminPassword)){
loginFrame.setVisible(false);
adminFrame.setVisible(true);
}
else logInPassword.setText(null);
logInPassword.append("Incorrect");
}
if (source == menItSet1){
menit1.equals(setItem1.getText());
menitprice1 = Double.parseDouble(setPrice1.getText());
}
}
}
最佳答案
您可以创建一个字符串，然后将该字符串中的值传递到您的操作监听器中。请在下面找到一个本地字符串(应该是一个实例，但为了测试我做了一个本地字符串)。然后我将它传递给按钮。
if (source == menItSet1){
String text = setItem1.getText();
menitprice1 = Double.parseDouble(setPrice1.getText());
menuItem1.setText(text + " " + menitprice1);
}
关于java - JButton更新标签，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/42737479/