Java Hex to Int hexChar2Int(char ch)

Description

hex Char Int

License

Open Source License

Return

value of the hex digit

Declaration

public static byte hexChar2Int(char ch) 

Method Source Code

//package com.java2s;
/*//  ww w.jav a 2 s. c  o m
 * Copyright (c) 2014, 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 {
    /**
     * @return value of the hex digit
     */
    public static byte hexChar2Int(char ch) {
        boolean f1 = ch >= '0' && ch <= '9';
        boolean f2 = ch >= 'A' && ch <= 'F';
        boolean f3 = ch >= 'a' && ch <= 'f';
        if (!(f1 || f2 || f3)) {
            return -1;
        }
        if (f1) {
            return (byte) (ch - '0');
        } else if (f2) {
            return (byte) (10 + ch - 'A');
        } else {
            return (byte) (10 + ch - 'a');
        }
    }
}

Related

1. convertHexStringToInt(String hex)
2. convertHexStringToInt(String hexString)
3. convertHexToDec(String in)
4. convertHexToInt(String hex)
5. hexChar2dec(char hex)