Integer.parseint in Java, exception when '+' comes first

Question

Integer.parseInt(\"-1000\"); returns -1000 as the output.

Integer.parseInt(\"+500\"); throws an exception.

How will I be able to re

Answer 1

The method is behaving as described in the documentation:

The characters in the string must all be decimal digits, except that the first character may be an ASCII minus sign '-' ('\u002D') to indicate a negative value.

You need to skip the first character if it is a + to do the parse correctly:

if (s.charAt(0) == '+') s = s.substring(1);
int val= Integer.parseInt(s);