Java Hex to String formatHex(byte[] buf)

Description

format Hex

License

Open Source License

Declaration

public static String formatHex(byte[] buf) 

Method Source Code

//package com.java2s;
/**//from   www.ja  v a  2s .co  m
 * Copyright 2016 TIBCO Software Inc. All rights reserved.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); You may not use this file except 
 * in compliance with the License.
 * A copy of the License is included in the distribution package with this file.
 * You also 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.
    
 * File name :HexUtils
 * Created on: 12/26/14
 * Created by: suresh
    
 * SVN Id: $Id: HexUtils.java 622 2016-03-19 20:51:12Z ssubrama $
 */

import java.io.StringWriter;
import java.io.Writer;

public class Main {
    static String NullString = "0000";
    static char Space = ' ';
    static String NewLine = "\r\n";

    public static String formatHex(byte[] buf) {

        if (buf == null)
            return NullString;

        try (StringWriter sw = new StringWriter()) {

            formatHexToWriter(buf, sw, 0);
            return sw.toString();
        } catch (Exception e) {
            return NullString;
        }

    }

    public static String formatHex(byte[] buf, int actualLength) {

        if (buf == null)
            return NullString;

        try (StringWriter sw = new StringWriter()) {

            formatHexToWriter(buf, sw, actualLength);
            return sw.toString();
        } catch (Exception e) {
            return NullString;
        }

    }

    public static void formatHexToWriter(byte[] buf, Writer writer, int actualLength) throws Exception {
        formatHexToWriter(buf, writer, 48, actualLength);
        return;

    }

    public static void formatHexToWriter(byte[] buf, Writer writer, int lineLength, int actualLength)
            throws Exception {

        int blen = buf.length;
        boolean bNewLine = false;
        int lineNo = 1;

        writer.append("Formatted Byte Array:").append(NewLine);
        writer.append(String.format("%08x", 0));
        writer.append(Space);

        if (actualLength > 0) {
            blen = actualLength;
        }
        for (int i = 0; i < blen; i++) {
            if (bNewLine) {
                bNewLine = false;
                writer.append(NewLine);
                writer.append(String.format("%08x", (lineNo * lineLength)));
                writer.append(Space);
            }

            writer.append(String.format("%02x", buf[i]));

            if ((i + 1) % 2 == 0)
                writer.append(Space);

            if ((i + 1) % lineLength == 0) {
                bNewLine = true;
                ++lineNo;
                writer.flush();
            }

        }

    }
}

Related

1. convertHexStr(String inStr)
2. convertHexString(String ss)
3. convertHexStringToString(String hexString)
4. convertHexToString(String hex)
5. formatHex(byte[] data)
6. formatHexToWriter(byte[] buf, Writer writer, int actualLength)