How to Avoid NoSuchElementException When Using Scanner.nextInt()?

Scanner Error with nextInt()

The Scanner class is a convenient tool for reading input from a console, but it can throw errors like NoSuchElementException if you try to read a type that doesn't exist in the input stream.

In the provided code:

Scanner s = new Scanner(System.in);
int choice = s.nextInt();

The nextInt() method attempts to read an integer from the standard input stream, but if no integer is available, it throws the NoSuchElementException. To avoid this error, always check if there is an integer to read using the hasNextInt() method:

Scanner s = new Scanner(System.in);
while(s.hasNextInt()) {
    int choice = s.nextInt();
    // Process the input
}
s.close();

This code will loop until there are no more integers to read, eliminating the risk of the NoSuchElementException. Additionally, use the hasNextInt() method to prevent entering an infinite loop if there are no integers to read.

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