两个打印语句，但只有一个显示用户输入的字符串

Question

使用此代码，我希望从用户那里获得 2 种食物。 food1 的 print 语句打印并显示用户在控制台中正确输入的字符串。对于 food2 的打印语句，它将打印该语句，但用户输入的字符串不会与其一起显示。我试过使用 print/println 都没有改变任何东西。

for(x=1; x <= 2; x++)

System.out.print("Enter nationality of the food: ");
Nation = sc.nextLine();
System.out.print("Enter your first food: ");

food1 = sc.nextLine();
System.out.print("Enter food price: ");
value1 = sc.nextDouble();

System.out.print("Enter your second food choice: ");
food2 = sc.nextLine();
sc.next();
System.out.print("Enter food price: ");
value2 = sc.nextDouble();
total = (value1 + value2);
System.out.println("Your food nationality: " + Nation);
System.out.printf("Your total price is: %.2f\n", total);
System.out.print("Would you like to list your items? (1 For Yes/2 For No)");
choice = sc.nextInt();
while( choice == 1)

  System.out.println("Your first food: " + food1); // This one displays correctly in the console 
  System.out.println("Your second food: " + food2); // This one does not display the string that the user inputted in the console 
  choice++;
  sc.nextLine();

Answer 1

sc.nextDouble() 不接受整行，只接受下一个十进制值。因此，您需要先阅读该行，然后再阅读 food2。

System.out.print("Enter your first food: ");
food1 = sc.nextLine();
System.out.print("Enter food price: ");
value1 = sc.nextDouble();
sc.nextLine(); // add this line

System.out.print("Enter your second food choice: ");
food2 = sc.nextLine();
sc.next(); // I am not sure what you are doing here. If I understand your code correctly, you can delete this
System.out.print("Enter food price: ");
value2 = sc.nextDouble();
sc.nextLine(); // add this line

两个打印语句，但只有一个显示用户输入的字符串

Two print statements, but only one displays a user input string

java

string

console