Java InputMismatchException
You can use a do-while loop instead to eliminate the first input.nextInt()
.
do {
try {
System.out.print("Enter the number of students: ");
students = input.nextInt();
} catch (InputMismatchException e) {
System.out.print("Invalid number of students. ");
}
input.nextLine(); // clears the buffer
} while (students <= 0);
Therefore all InputMismatchException
can be handled in one place.
from the doc
Scanner.nextInt Scans the next token of the input as an int. if the next token does not match the Integer regular expression, or is out of range
So it seems you are not entering any integer as input.
you can use
while (students <= 0) {
try {
System.out.print("Enter the number of students: ");
students = input1.nextInt();
}
catch (InputMismatchException e) {
input1.nextLine();
}
}