ROT-13 function in java?

Question

Is there already a rot13() and unrot13() implementation as part of one of the standard Java libraries? Or do I have to write it myself and \"reinv

Answer 1

I don't think it's part of Java by default, but here's an example of how you can implement it;

public class Rot13 { 

    public static void main(String[] args) {
        String s = args[0];
        for (int i = 0; i < s.length(); i++) {
            char c = s.charAt(i);
            if       (c >= 'a' && c <= 'm') c += 13;
            else if  (c >= 'A' && c <= 'M') c += 13;
            else if  (c >= 'n' && c <= 'z') c -= 13;
            else if  (c >= 'N' && c <= 'Z') c -= 13;
            System.out.print(c);
        }
        System.out.println();
    }

}

Source: http://introcs.cs.princeton.edu/java/31datatype/Rot13.java.html