Java Hex Calculate toHex(byte[] bytes)

Description

to Hex

License

Open Source License

Declaration

public static String toHex(byte[] bytes) 

Method Source Code

//package com.java2s;
/*/*from  w w  w . j  av  a 2  s .c  o m*/
 * JBoss, Home of Professional Open Source.
 * Copyright 2011, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

public class Main {
    public static String toHex(byte[] bytes) {
        StringBuffer sb = new StringBuffer(bytes.length * 2);
        for (int i = 0; i < bytes.length; i++) {
            byte b = bytes[i];
            // top 4 bits
            char c = (char) ((b >> 4) & 0xf);
            if (c > 9)
                c = (char) ((c - 10) + 'a');
            else
                c = (char) (c + '0');
            sb.append(c);
            // bottom 4 bits
            c = (char) (b & 0xf);
            if (c > 9)
                c = (char) ((c - 10) + 'a');
            else
                c = (char) (c + '0');
            sb.append(c);
        }
        return sb.toString();
    }
}

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