How does System.in.read() work?

Question

Java

As I understand it, it returns the int-code of the number.
so I got the number itself.
int index = Character.getNumericValue(System.in.read());
but for some reason it still works crookedly for several digits (it seems that read () returns only 1 number). Are there better alternatives?

Answer 1

It returns the character code read from the System.in stream.
If you enter the number 123, you will get the character code '1' - 49
Look at the Scanner, it allows you to wrap the stream and read primitive types and strings from it.

Scanner scanner = new Scanner(System.in);
int i = scanner.nextInt();