我正在创建一个程序，提示用户输入正整数。程序接受整数，直到输入-1。用户输入another = input.nextLine()后，输入的整数和整数之和将显示。如果用户尝试输入负数，程序会告诉用户它是无效输入并输入正整数。我遇到的问题是在程序的最后。它不允许我输入y（是）或（否），即使它应该让我，因为我特意添加了import java.util.Scanner;
public class InputSum
{
public static void main (String[] args)
{
int integer = 0;
int sum = 0;
int count = 0;
String string = " ";
String another = "y";
Scanner input = new Scanner(System.in); // scanner object
while (another.equalsIgnoreCase("y")) {
while (integer != -1){
count = count + 1;
System.out.print ("Enter a positive integer (-1 to exit): ");
integer = input.nextInt();
while (integer < -1){
System.out.print ("Invalid input was entered. Enter a positive integer (-1 to exit) : ");
integer = input.nextInt();
}
if (integer == -1)
continue;
sum = sum + integer;
string = string + integer + ", ";
}
if (count == 1){
System.out.println ("\n" + "No values were entered");
System.out.println ("The Sum: " + sum);
}
else
System.out.println ("\n" + "Entered value: " + string.substring(0, string.length()-2) + "\n" + "The Sum: " + "\t" + sum);
System.out.print ("Run the program again (y/n)?: ");
another = input.nextLine();
}
}
}
;。它只是完成了程序。我如何拥有它以便读取 y（是）或 n（no）的用户输入并让用户输入另一组整数？
SELECT train.id,
train.class_id,
train.type_id,
train.m_year,
train_type.type,
train_type.avarage_speed,
train_class.class,
train_class.capacity
FROM train
INNER JOIN train_class
ON train.class_id = train_class.id
AND train.type_id = train_type.id