我们所有的源代码都是有效的UTF-8，但Windows上的某些用户无法构建它们，因为他们的系统配置了不同的编码。
如果不向源文件添加BOM，是否可以告诉MSVC将所有源视为UTF-8，而不管用户系统编码是什么？
See MSDN's link regarding this topic（需要添加BOM表头）。
答案 0 :(得分：2)
您可以尝试：
import java.awt.*;
import java.awt.event.*;
import java.util.EventObject;
import javax.swing.*;
public class FinalProject extends JFrame implements ActionListener {
private static final long serialVersionUID = 1 L;
JLabel l1, l2, l3, l4, l5, l6, l7, l8, l9, l10, l11, l12, l13, l14, foodkiosk,
healthkiosk, sundrieskiosk, shelf1, shelf2, shelf3, shelf4, shelf5, shelf6,
shelf7, shelf8, shelf9;
JButton b1, b2, b3, b4, b5;
JButton potatoes, popcorn, crackers, chipmix, peanuts, chocolate, nutmix,
healthbar, raisins, cookies, figbar, pretzels;
JButton aspirin, acetom, vitC, vitB, bandaids, antibiotics, antiitch, gauze,
toothpaste, toothbrush, dentfloss, adhesive;
JButton sewingkit, nailkit, facetissue, tolietpaper, handcream,
bodylotion, deodorant, antiperspirant, schoolshirt, sweatpants, pencilkit,
handwipes;
double[] price1 = {
1.50,
1.00,
1.00,
1.25,
1.00,
1.25,
1.00,
2.00,
1.00,
1.00,
1.50,
1.25
};
double[] price2 = {
2.00,
2.00,
2.00,
2.00,
1.00,
2.00,
2.00,
1.00,
1.00,
1.00,
1.00,
1.00
};
double[] price3 = {
1.00,
2.00,
1.00,
1.00,
1.00,
1.00,
1.00,
1.50,
3.00,
4.00,
2.00,
1.00
};
String item = "";
JTextField t1, t2, t3;
int potatoes1 = 0;
int popcorn1 = 0;
int crackers1 = 0;
int chipmix1 = 0;
int peanuts1 = 0;
int chocolate1 = 0;
int nutmix1 = 0;
int healthbar1 = 0;
int raisins1 = 0;
int cookies1 = 0;
int figbar1 = 0;
int pretzels1 = 0;
int aspirin1 = 0;
int acetom1 = 0;
int vitC1 = 0;
int vitB1 = 0;
int bandaids1 = 0;
int antibiotics1 = 0;
int antiitch1 = 0;
int gauze1 = 0;
int toothpaste1 = 0;
int toothbrush1 = 0;
int dentfloss1 = 0;
int adhesive1 = 0;
int sewingkit1 = 0;
int nailkit1 = 0;
int facetissue1 = 0;
int tolietpaper1 = 0;
int handcream1 = 0;
int bodylotion1 = 0;
int deodorant1 = 0;
int antiperspirant1 = 0;
int schoolshirt1 = 0;
int sweatpants1 = 0;
int pencilkit1 = 0;
int handwipes1 = 0;
private JRadioButton EDUcard, visa, discover;
private ButtonGroup group;
String[] food = {
"Potato Chips",
"Popcorn",
"Crackers",
"Chip
Mix ","
Peanuts ", "
Chocolate bar ","
Mixed nuts ", "
Health bar ", "
Raisins ",
"Cookies",
"Fig bars",
"Pretzels"
};
String[] health = {
"Aspirin",
"Acetominophen",
"Vitamin C",
"Vitamin B
Complex ", "
Bandaids ", "
Antibiotic Ointment ", "
Anit - Itch Ointment ", "
Gauze
Pad ", "
Toothpaste ", "
Toothbrush ", "
Dental Floss ", "
Adhesive Tape "};
String[] sundries = {
"Sewing Kit",
"Nail Kit",
"Facial Tissues",
"Toliet
Tissue ","
Hand Cream ","
Body Lotion ","
Deodorant ","
Anti - Perspirant ","
School Tee
Shirt ","
Sweat Pants ","
Pencil Pen Stationary Kit ","
Handy Wipes ",};
FinalProject() {
l1 = new JLabel(" Customer Name");
l2 = new JLabel(" ");
l3 = new JLabel(" amount to pay");
l4 = new JLabel(" ");
l5 = new JLabel(" ");
l6 = new JLabel(" ");
l7 = new JLabel(" ");
l8 = new JLabel(" ");
l9 = new JLabel(" ");
l10 = new JLabel(" ");
l11 = new JLabel(" ");
l12 = new JLabel(" ");
l13 = new JLabel(" ");
l14 = new JLabel(" ");
foodkiosk = new JLabel("Food Kiosk");
healthkiosk = new JLabel("Health Kiosk");
sundrieskiosk = new JLabel("Sundries Kiosk");
shelf1 = new JLabel("Shelf 1");
shelf2 = new JLabel("Shelf 2");
shelf3 = new JLabel("Shelf 3");
shelf4 = new JLabel("Shelf 4");
shelf5 = new JLabel("Shelf 5");
shelf6 = new JLabel("Shelf 6");
shelf7 = new JLabel("Shelf 7");
shelf8 = new JLabel("Shelf 8");
shelf9 = new JLabel("Shelf 9");
b1 = new JButton("COMPUTE");
b2 = new JButton("EXIT");
potatoes = new JButton("Potato Chips");
popcorn = new JButton("Popcorn");
crackers = new JButton("Crackers");
chipmix = new JButton("Chip Mix");
peanuts = new JButton("Peanuts");
chocolate = new JButton("Chocolate");
nutmix = new JButton("Mixed nuts");
healthbar = new JButton("Health Bar");
raisins = new JButton("Raisins");
cookies = new JButton("Cookies");
figbar = new JButton("Fig Bars");
pretzels = new JButton("Pretzals");
aspirin = new JButton("Aspirin");
acetom = new JButton("Acetominophen");
vitC = new JButton("Vitamin C");
vitB = new JButton("Vitamin B Complex");
bandaids = new JButton("Bandaids");
antibiotics = new JButton("Antibiotic Ointment");
antiitch = new JButton("Anit-Itch Ointment");
gauze = new JButton("Gauze Pads");
toothpaste = new JButton("Toothpaste");
toothbrush = new JButton("Toothbrush");
dentfloss = new JButton("Dental Floss");
adhesive = new JButton("Adhesive Tape");
sewingkit = new JButton("Sewing Kit");
nailkit = new JButton("Nail Kit");
facetissue = new JButton("Facial Tissues");
tolietpaper = new JButton("Toliet Tissue");
handcream = new JButton("Hand Cream");
bodylotion = new JButton("Body Lotion");
deodorant = new JButton("Deodorant");
antiperspirant = new JButton("Anti-Perspirant");
schoolshirt = new JButton("School Tee-Shirt");
sweatpants = new JButton("Sweatpants");
pencilkit = new JButton("Pencil Pen Stationary Kit");
handwipes = new JButton("Handy Wipes");
t1 = new JTextField(10);
t2 = new JTextField(10);
EDUcard = new JRadioButton("EDUcard", true);
visa = new JRadioButton("visa", false);
discover = new JRadioButton("discover", false);
group = new ButtonGroup();
group.add(EDUcard);
group.add(visa);
group.add(discover);
add(l1);
add(t1);
add(foodkiosk);
add(shelf1);
add(potatoes);
add(popcorn);
add(crackers);
add(chipmix);
add(l4);
add(shelf2);
add(peanuts);
add(chocolate);
add(nutmix);
add(healthbar);
add(l5);
add(shelf3);
add(raisins);
add(cookies);
add(figbar);
add(pretzels);
add(l8);
add(healthkiosk);
add(shelf4);
add(aspirin);
add(acetom);
add(vitC);
add(vitB);
add(l9);
add(shelf5);
add(bandaids);
add(antibiotics);
add(antiitch);
add(gauze);
add(l10);
add(shelf6);
add(toothpaste);
add(toothbrush);
add(dentfloss);
add(adhesive);
add(l11);
add(sundrieskiosk);
add(shelf7);
add(sewingkit);
add(nailkit);
add(facetissue);
add(tolietpaper);
add(l12);
add(shelf8);
add(handcream);
add(bodylotion);
add(deodorant);
add(antiperspirant);
add(l13);
add(shelf9);
add(schoolshirt);
add(sweatpants);
add(pencilkit);
add(handwipes);
add(l7);
add(EDUcard);
add(discover);
add(visa);
add(l2);
add(l6);
add(b1);
add(b2);
b1.addActionListener(this);
b2.addActionListener(e -> System.exit(0));
potatoes.addActionListener(this);
popcorn.addActionListener(this);
crackers.addActionListener(this);
chipmix.addActionListener(this);
peanuts.addActionListener(this);
chocolate.addActionListener(this);
nutmix.addActionListener(this);
healthbar.addActionListener(this);
raisins.addActionListener(this);
cookies.addActionListener(this);
figbar.addActionListener(this);
pretzels.addActionListener(this);
aspirin.addActionListener(this);
acetom.addActionListener(this);
vitC.addActionListener(this);
vitB.addActionListener(this);
bandaids.addActionListener(this);
antibiotics.addActionListener(this);
antiitch.addActionListener(this);
gauze.addActionListener(this);
toothpaste.addActionListener(this);
toothbrush.addActionListener(this);
dentfloss.addActionListener(this);
adhesive.addActionListener(this);
sewingkit.addActionListener(this);
nailkit.addActionListener(this);
facetissue.addActionListener(this);
tolietpaper.addActionListener(this);
handcream.addActionListener(this);
bodylotion.addActionListener(this);
deodorant.addActionListener(this);
antiperspirant.addActionListener(this);
schoolshirt.addActionListener(this);
sweatpants.addActionListener(this);
pencilkit.addActionListener(this);
handwipes.addActionListener(this);
setSize(800, 800);
setLayout(new GridLayout(10, 5));
setTitle("Vending Machine");
double total = 0.0;
String card = "discover";
if (chocolate1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (popcorn1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (peanuts1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (crackers1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (raisins1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (healthbar1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (chipmix1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (potatoes1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (cookies1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (nutmix1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (figbar1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (pretzels1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (adhesive1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (dentfloss1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (sweatpants1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (pencilkit1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (schoolshirt1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (antibiotics1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (antiitch1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (gauze1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (toothbrush1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (vitC1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (toothpaste1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (vitB1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (aspirin1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (acetom1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (bandaids1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (sewingkit1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (nailkit1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (facetissue1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (tolietpaper1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (handcream1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (bodylotion1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (deodorant1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (antiperspirant1 < 5) {
System.out.println("You need to restock back up to 10");
}
if (EDUcard.isSelected() == true) {
card += " EDUcard will be used to pay";
}
if (visa.isSelected() == true) {
card += " Visa will be used to pay";
}
if (discover.isSelected() == true) {
card += " discover will be used to pay";
}
if (popcorn.isSelected() == true) {
System.out.println("Popcorn");
total += total + price1[1];
item = "Popcorn";
}
if (potatoes.isSelected() == true) {
System.out.println("Potato chips");
total = total + price1[0];
item = "Potato chips";
}
if (crackers.isSelected() == true) {
total = total + price1[2];
System.out.println("Crackers");
item = "Crackers";
}
if (chipmix.isSelected() == true) {
System.out.println("Chip Mix");
total = total + price1[3];
item = "Chip Mix";
}
if (peanuts.isSelected() == true) {
System.out.println("Peanuts");
total = total + price1[4];
item = "Peanuts";
}
if (chocolate.isSelected() == true) {
System.out.println("Chocolate Bar");
total = total + price1[5];
item = "Chocolate Bar";
}
if (nutmix.isSelected() == true) {
System.out.println("Mixed Nuts");
total = total + price1[6];
item = "Mixed Nuts";
}
if (healthbar.isSelected() == true) {
System.out.println("Health Bar");
total = total + price1[7];
item = "Health Bar";
}
if (raisins.isSelected() == true) {
System.out.println("Raisins");
total = total + price1[8];
item
= "Raisins";
}
if (cookies.isSelected() == true) {
System.out.println("Cookies");
total = total + price1[9];
item = "Cookies";
}
if (figbar.isSelected() == true) {
System.out.println("Fig Bars");
total = total + price1[10];
item = "Fig Bars";
}
if (pretzels.isSelected() == true) {
System.out.println("Pretzels");
total = total + price1[11];
item = "Pretzels";
}
if (aspirin.isSelected() == true) {
System.out.println("Aspirin");
total = total + price2[0];
item = "Aspirin";
}
if (acetom.isSelected() == true) {
System.out.println("Acetominophen");
total = total + price2[1];
item = "Acetominophen";
}
if (vitC.isSelected() == true) {
System.out.println("Vitamin C");
total = total + price2[2];
item = "Vitamin C";
}
if (vitB.isSelected() == true) {
System.out.println("Vitamin B Complex");
total = total + price2[3];
item = "Vitamin B Complex";
}
if (bandaids.isSelected() == true) {
System.out.println("Bandaids");
total = total + price2[4];
item = "Bandaids";
}
if (antibiotics.isSelected() == true) {
System.out.println("Antibiotic Ointment");
total = total + price2[5];
item = "Antibiotic Ointment";
}
if (antiitch.isSelected() == true) {
System.out.println("Anti-Itch Ointment");
total = total + price2[6];
item = "Anti-Itch Ointment";
}
if (gauze.isSelected() == true) {
System.out.println("Gauze Pads");
total = total + price2[7];
item = "Gauze Pads";
}
if (toothpaste.isSelected() == true) {
System.out.println("Toothpaste");
total = total + price2[8];
item = "Toothpaste";
}
if (toothbrush.isSelected() == true) {
System.out.println("Toothbrush");
total = total + price2[9];
item = "Toothbrush";
}
if (dentfloss.isSelected() == true) {
System.out.println("Dental Floss");
total = total + price2[10];
item = "Dental Floss";
}
if (adhesive.isSelected() == true) {
System.out.println("Adhesive Tape");
total = total + price2[11];
item = "Adhesive Tape";
}
if (sewingkit.isSelected() == true) {
System.out.println("Sewing Kit");
total = total + price3[0];
item = "Sewing Kit";
}
if (nailkit.isSelected() == true) {
System.out.println("Nail Kit");
total = total + price3[1];
item = "Nail Kit";
}
if (facetissue.isSelected() == true) {
System.out.println("Facial Tissues");
total = total + price3[2];
item = "Facial Tissue";
}
if (tolietpaper.isSelected() == true) {
System.out.println("Toliet Tissue");
total = total + price3[3];
item = "Toliet Tissue";
}
if (handcream.isSelected() == true) {
System.out.println("Hand Cream");
total = total + price3[4];
item = "Hand Cream";
}
if (bodylotion.isSelected() == true) {
System.out.println("Body Lotion");
total = total + price3[5];
item = "Body Lotion";
}
if (deodorant.isSelected() == true) {
System.out.println("Deodorant");
total = total + price3[6];
item = "Deodorant";
}
if (antiperspirant.isSelected() == true) {
System.out.println("Anti-perspirant");
total = total + price3[7];
item = "Anti-perspirant";
}
if (schoolshirt.isSelected() == true) {
System.out.println("School Tee Shirt");
total = total + price3[8];
item = "School Tee Shirt";
}
if (sweatpants.isSelected() == true) {
System.out.println("Sweatpants");
total = total + price3[9];
item = "Sweatpants";
}
if (pencilkit.isSelected() == true) {
System.out.println("Pen Pencil Stationary Kit");
total = total + price3[10];
item = "Pen Pencil Stationary Kit";
}
if (handwipes.isSelected() == true) {
System.out.println("Handy Wipes");
total = total + price3[11];
item = "Handy Wipes";
}
}
String card = "";
String a = "";
int total = 0;
String message = " Hello! your order is \t " + item + " on " + " " + "total
amount: $ " + total +"
for: \t " +a +"
you used card: "+ card;
public void actionPerformed(ActionEvent ae) {
if (ae.getSource() == b1) {
String a1 = t1.getText();
String a = "";
message = " Hello! your order is \t " + item + " on " + " " + "total amount: $" + total + " for: \t" + a + "you used card: " + card;
t2.setText("thank you: " + a);
JOptionPane.showMessageDialog(null, "summary: \n" + message, "Order Summary", JOptionPane.PLAIN_MESSAGE);
JOptionPane.showMessageDialog(null, "Summary: \n" + message,
"Order Summary", JOptionPane.PLAIN_MESSAGE);
}
if (ae.getSource() == potatoes) {
potatoes1 = potatoes1 + 1;
}
if (ae.getSource() == popcorn) {
popcorn1 = popcorn1 + 1;
}
if (ae.getSource() == chipmix) {
chipmix1 = chipmix1 + 1;
}
if (ae.getSource() == crackers) {
crackers1 = crackers1 + 1;
}
if (ae.getSource() == peanuts) {
peanuts1 = peanuts1 + 1;
}
if (ae.getSource() == chocolate) {
chocolate1 = chocolate1 + 1;
}
if (ae.getSource() == nutmix) {
nutmix1 = nutmix1 + 1;
}
if (ae.getSource() == healthbar) {
healthbar1 = healthbar1 + 1;
}
if (ae.getSource() == raisins) {
raisins1 = raisins1 + 1;
}
if (ae.getSource() == cookies) {
cookies1 = cookies1 + 1;
}
if (ae.getSource() == figbar) {
figbar1 = figbar1 + 1;
}
if (ae.getSource() == pretzels) {
pretzels1 = pretzels1 + 1;
}
if (ae.getSource() == aspirin) {
aspirin1 = aspirin1 + 1;
}
if (ae.getSource() == acetom) {
acetom1 = acetom1 + 1;
}
if (ae.getSource() == vitC) {
vitC1 = vitC1 + 1;
}
if (ae.getSource() == vitB) {
vitB1 = vitB1 + 1;
}
if (ae.getSource() == bandaids) {
bandaids1 = bandaids1 + 1;
}
if (ae.getSource() == antibiotics) {
antibiotics1 = antibiotics1 + 1;
}
if (ae.getSource() == antiitch) {
antiitch1 = antiitch1 + 1;
}
if (ae.getSource() == gauze) {
gauze1 = gauze1 + 1;
}
if (ae.getSource() == toothpaste) {
toothpaste1 = toothpaste1 + 1;
}
if (ae.getSource() == toothbrush) {
toothbrush1 = toothbrush1 + 1;
}
if (ae.getSource() == dentfloss) {
dentfloss1 = dentfloss1 + 1;
}
if (ae.getSource() == adhesive) {
adhesive1 = adhesive1 + 1;
}
if (ae.getSource() == schoolshirt) {
schoolshirt1 = schoolshirt1 + 1;
}
if (ae.getSource() == sweatpants) {
sweatpants1 = sweatpants1 + 1;
}
if (ae.getSource() == sewingkit) {
sewingkit1 = sewingkit1 + 1;
}
if (ae.getSource() == nailkit) {
nailkit1 = nailkit1 + 1;
}
if (ae.getSource() == facetissue) {
facetissue1 = facetissue1 + 1;
}
if (ae.getSource() == tolietpaper) {
tolietpaper1 = tolietpaper1 + 1;
}
if (ae.getSource() == pencilkit) {
pencilkit1 = pencilkit1 + 1;
}
if (ae.getSource() == handwipes) {
handwipes1 = handwipes1 + 1;
}
if (ae.getSource() == handcream) {
handcream1 = handcream1 + 1;
}
if (ae.getSource() == bodylotion) {
bodylotion1 = bodylotion1 + 1;
}
if (ae.getSource() == deodorant) {
deodorant1 = deodorant1 + 1;
}
if (ae.getSource() == antiperspirant) {
antiperspirant1 = antiperspirant1 + 1;
}
}
public static void main(String[] args) {
FinalProject a = new FinalProject();
a.setVisible(true);
a.setLocation(200, 200);
}
}
默认情况下，Visual Studio会检测字节顺序标记，以确定源文件是否采用编码的Unicode格式，例如UTF-16或UTF-8。如果未找到字节顺序标记，则假定使用当前用户代码页对源文件进行编码，除非您使用
add_compile_options("$<$<C_COMPILER_ID:MSVC>:/utf-8>") add_compile_options("$<$<CXX_COMPILER_ID:MSVC>:/utf-8>")或/utf-8选项指定了代码页。
<强>参考