Here you can find the source of toBase58(byte[] b)
public static String toBase58(byte[] b)
//package com.java2s; /*//from w w w . jav a2 s.c o m * Copyright 2013 bits of proof zrt. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.math.BigInteger; public class Main { private static final char[] b58 = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz" .toCharArray(); public static String toBase58(byte[] b) { if (b.length == 0) { return ""; } int lz = 0; while (lz < b.length && b[lz] == 0) { ++lz; } StringBuffer s = new StringBuffer(); BigInteger n = new BigInteger(1, b); while (n.compareTo(BigInteger.ZERO) > 0) { BigInteger[] r = n.divideAndRemainder(BigInteger.valueOf(58)); n = r[0]; char digit = b58[r[1].intValue()]; s.append(digit); } while (lz > 0) { --lz; s.append("1"); } return s.reverse().toString(); } public static byte[] reverse(byte[] data) { for (int i = 0, j = data.length - 1; i < data.length / 2; i++, j--) { data[i] ^= data[j]; data[j] ^= data[i]; data[i] ^= data[j]; } return data; } }