com.tag.HexUtils.java Source code

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Here is the source code for com.tag.HexUtils.java

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/**
 * Copyright 2011 Taggart Spilman
 * 
 * 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
 * 
 * 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.
 */

package com.tag;

import org.apache.commons.lang3.StringUtils;

public class HexUtils {

    private HexUtils() {

    }

    public static int unsigned(byte b) {
        return 0xFF & b;
    }

    public static String toHex(byte b) {
        int i = unsigned(b);
        return toHex(i);
    }

    public static String toHex(int i) {
        String hex = Integer.toHexString(i);
        int size = 2;
        hex = StringUtils.leftPad(hex, size, '0');
        hex = hex.toUpperCase();
        int length = hex.length();
        int beginIndex = length - size;
        return hex.substring(beginIndex);
    }

}