Java Hex Calculate toHexByte(final char ch1, final char ch2)

Description

to Hex Byte

License

Open Source License

Declaration

private static int toHexByte(final char ch1, final char ch2) 

Method Source Code

//package com.java2s;
/*//from  w  w  w.  ja  va2s. c o  m
 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. 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 GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

public class Main {
    private static int toHexByte(final char ch1, final char ch2) {
        final int i1 = hexDigit(ch1);
        final int i2 = hexDigit(ch2);
        if (i1 >= 0 && i2 >= 0) {
            return (i1 << 4) | i2;
        }
        return -1;
    }

    private static int hexDigit(final char ch) {
        final char chu = Character.toUpperCase(ch);
        if (chu >= '0' && chu <= '9') {
            return (chu - '0');
        } else if (chu >= 'A' && chu <= 'F') {
            return (chu - 'A' + 10);
        } else {
            return -1;
        }
    }
}

Related

1. toHexArray(byte[] binary)
2. toHexaString(byte[] data)
3. toHexaString(int value)
4. toHexByte(byte b)
5. toHexByte(byte b, StringBuffer sb)
6. toHexByte(int bite)
7. toHexByte(int i)
8. toHexByteArray(final byte[] buffer)
9. toHexBytes(byte[] bytes)