Bitcoin Forum

package base58;

import java.math.BigInteger;

public class base58 {
	public static void main(String[] args) {
		String hexHashString = "0000112233445566778899AABBCCDDEEFF010203040D976788";
		char zeroChar = "0".charAt(0);
		char[] charmap = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz".toCharArray();
		BigInteger myInt = new BigInteger(hexHashString, 16);
		BigInteger base = BigInteger.valueOf(58);
		StringBuilder myBuilder = new StringBuilder();
		while(myInt.compareTo(BigInteger.ZERO) > 0) {
			BigInteger[] data = myInt.divideAndRemainder(base);
			myInt = data[0];
			myBuilder.append(charmap[data[1].intValue()]);
		}
		int charCount = 0;
		for(char myChar:hexHashString.toCharArray()) {
			if(charCount++ < 2) {
				continue;
			}
			if(myChar == zeroChar) {
				myBuilder.append(charmap[0]);
			} else {
				break;
			}
		}
		for(int i = myBuilder.toString().length()-1; i >= 0; i--) {
			System.out.print(myBuilder.toString().charAt(i));
		}
	}
}