Java - cast int to string and string to int

public class Main {

    public static void main(String[] args) {
        String s = "23";
        int i = 22;

        // int to string
        String iString = Integer.toString(i);
        System.out.println(iString);
        // output:
        //  22

        // string to int
        int sInt = Integer.parseInt(s);
        System.out.println(sInt);
        // output:
        //  23
    }
}