Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2009 Google Inc.  All rights reserved.
 *
 * 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 {
    /**
     * Converts an array of bytes to a string of hexadecimal characters.
     * Leading null bytes are preserved in the output.
     * <p>
     * The input byte stream is assumed to be a positive, two's complement
     * representation of an integer.  The return value is the hexadecimal string
     * representation of this value.
     * 
     * @param bytes  the bytes to convert
     * @return       the string representation
     */
    public static String bytesToHexString(byte[] bytes) {
        if (bytes == null || bytes.length == 0) {
            return "";
        }
        BigInteger bigint = new BigInteger(1, bytes);
        int formatLen = bytes.length * 2;
        return String.format("%0" + formatLen + "x", bigint);
    }
}