How does Integer.parseInt(string) actually work?

Question

Was asked this question recently and did not know the answer. From a high level can someone explain how Java takes a character / String and convert it into an int.

M

Answer 1

• Find the length of the String (s) (say maxSize )
• Initialize result = 0
• begin loop ( int j=maxSize, i =0 ; j > 0; j--, i++)
• int digit = Character.digit(s.charAt(i))
• result= result + digit * (10 power j-1)
• end loop
• return result