Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/************************************************************************
 * Copyright (c) Crater Dog Technologies(TM).  All Rights Reserved.     *
 ************************************************************************
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.        *
 *                                                                      *
 * This code is free software; you can redistribute it and/or modify it *
 * under the terms of The MIT License (MIT), as published by the Open   *
 * Source Initiative. (See http://opensource.org/licenses/MIT)          *
 ************************************************************************/

public class Main {
    static private final String lookupTable = "01";

    /**
     * This function decodes a base 2 string into its corresponding byte array.
     *
     * @param base2 The base 2 encoded string.
     * @return The corresponding byte array.
     */
    static public byte[] decode(String base2) {
        String string = base2.replaceAll("\\s", ""); // remove all white space
        int length = string.length();
        byte[] bytes = new byte[(int) Math.ceil(length / 8)];
        for (int i = 0; i < bytes.length; i++) {
            int b = 0;
            for (int j = 0; j < 8; j++) {
                char character = string.charAt(i * 8 + j);
                int bit = lookupTable.indexOf(character);
                if (bit < 0)
                    throw new NumberFormatException("Attempted to decode a string that is not base 2: " + string);
                b = (b << 1) | bit;
            }
            bytes[i] = (byte) b;
        }
        return bytes;
    }
}