How do i convert a string that was changed to a different radix in java

Question

I have a string whose radix has been changed & its value is printed. Is there a way to convert the string back to its original form?

My code looks like:

String b=text2[i].toString(16);

Here text2 array is of BigInteger type. I want to get the original string from variable b.

Answer 1

new BigInteger(b, 16).toString();

Sample program:

public static void main(String[] args) {
    final BigInteger original = new BigInteger("27");
    final String converted = original.toString(16);
    final BigInteger convertedBack = new BigInteger(converted, 16);

    System.out.println("original = [" + original.toString() + "]");
    System.out.println("converted = [" + converted + "]");
    System.out.println("convertedBack = [" + convertedBack.toString() + "]");
}

Output:

original = [27]
converted = [1b]
convertedBack = [27]