Java String to Integer Conversion

I am trying to figure out how to convert a string that has integers in it to an integer variable.

Code:

import java.util.Scanner;

public class main {
    public static void main(String args[]) {

        Scanner input = new Scanner(System.in);
        System.out.println("Enter date of birth (MM/DD/YYYY):");
        String DOB = input.next();
        String month = DOB.substring(0, 1);
        String day = DOB.substring(3, 4);
        String year = DOB.substring(6, 9);
        int month1 = month;
        int age = 0;
        //age = 2013 - DOB - 1;
        int age2 = 0;

        age2  = age + 1;
        System.out.println("You are " + age + " or " + age2 + " years old");
    }
}

I want to turn String month, String day, and Sting year into integers.

Answer

use
int month = Integer.parseInt(stringMonth);