Java Integer.parseInt

The parseInt method of Integer class generally used to convert String to Integer
It parses the string argument as a signed decimal integer.
The characters in the string must all be decimal digits, except that the first character may be '-' or '+'.
It will throw a NumberFormatException exception if the string does not contain a parsable integer.

public class Lautturi {

	public static void main(String[] args) {

		Integer i = Integer.parseInt("1234");
		System.out.println(i);
		
	}
}