Parse and format to arbitrary radix <= Character.MAX_RADIX : BigInteger « Data Type « Java Tutorial

1. Java Tutorial
2. Data Type
3. BigInteger

import java.math.BigInteger;

public class Main {
  public static void main(String[] argv) throws Exception {
    int radix = 32;
    BigInteger bi = new BigInteger("vv", radix); 
    String s = bi.toString(radix); 

  }
}