Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * Copyright (c) 2015-2016 IBM Corporation. All rights reserved.
 * <p/>
 * 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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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 byte[] fromHexString(String hexString) {
        char[] chars = hexString.toCharArray();
        byte[] result = new byte[chars.length / 2];
        for (int i = 0; i < result.length; i++) {
            char c = chars[2 * i];
            int a = ((Character.isDigit(c) ? c - '0' : c - 'A' + 10) << 4) & 0xF0;
            c = chars[2 * i + 1];
            int b = (Character.isDigit(c) ? c - '0' : c - 'A' + 10) & 0x0F;
            result[i] = (byte) ((a | b) & 0xFF);
        }
        return result;
    }
}