Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
//License from project: Apache License 

import java.math.BigInteger;

public class Main {
    final protected static String base58Array = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";

    public static byte[] base58ToBytes(String value) {
        BigInteger bigNum58 = new BigInteger("58");
        BigInteger tempBigValue = new BigInteger("0");
        int leadingZeroes = 0;
        boolean justStarted = true;
        for (int i = 0; i < value.length(); i++) {
            if (justStarted && value.toCharArray()[i] == '1') {
                leadingZeroes++;
            } else {
                justStarted = false;
                tempBigValue = tempBigValue.add(bigNum58.pow(value.length() - i - 1)
                        .multiply(new BigInteger("" + base58Array.indexOf(value.toCharArray()[i]))));
            }
        }
        byte[] bigValue = tempBigValue.toByteArray();
        int bigValueStart = 0;
        for (int j = 0; j < bigValue.length; j++) {
            if (bigValue[j] != 0) {
                bigValueStart = j;
                break;
            }
        }
        byte[] byteResult = new byte[bigValue.length + leadingZeroes - bigValueStart];
        for (int i = 0; i < byteResult.length; i++) {
            if (i - leadingZeroes + bigValueStart < bigValue.length && i - leadingZeroes + bigValueStart >= 0)
                byteResult[i] = i < leadingZeroes ? 0 : bigValue[i - leadingZeroes + bigValueStart];
        }
        return byteResult;
    }
}