Java Hex Convert To fromHex(char hi, char lo)

Description

from Hex

License

Apache License

Declaration

public static byte fromHex(char hi, char lo) throws NumberFormatException 

Method Source Code

//package com.java2s;
/*/*ww w .  j a v a2s  .c  o m*/
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.
 */

public class Main {
    public static final String HEX_DIGITS = "0123456789abcdef";

    public static byte fromHex(char hi, char lo) throws NumberFormatException {
        int hiValue = HEX_DIGITS.indexOf(((hi >= 'A') && (hi <= 'F')) ? ('a' + (hi - 'A')) : hi);
        int loValue = HEX_DIGITS.indexOf(((lo >= 'A') && (lo <= 'F')) ? ('a' + (lo - 'A')) : lo);
        if ((hiValue < 0) || (loValue < 0)) {
            throw new NumberFormatException(
                    "fromHex(" + new String(new char[] { hi, lo }) + ") non-HEX characters");
        }

        return (byte) ((hiValue << 4) + loValue);
    }
}

Related

1. convertHexToChar(String hex)
2. convertHexToFloat(long hexValue)
3. fromHex(byte[] hex)
4. fromHex(char c)
5. fromHex(char c)
6. fromHex(CharSequence cs)
7. fromHex(final CharSequence s)
8. fromHex(final String hex)
9. fromHex(final String hex)