writes message data to a buffer in hex format - Java java.lang

Java examples for java.lang:Hex

  1. HOME
  2. Java
  3. java.lang
  4. Hex

Description

writes message data to a buffer in hex format

Demo Code

/*******************************************************************************
 * Copyright (c) 2004, 2007 Boeing.//from w  ww. jav a 2 s.  co  m
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Boeing - initial API and implementation
 *******************************************************************************/
//package com.java2s;

import java.nio.ByteBuffer;

public class Main {
    public static void main(String[] argv) throws Exception {
        StringBuilder strBuilder = new StringBuilder();
        byte[] data = new byte[] { 34, 35, 36, 37, 37, 37, 67, 68, 69 };
        int offset = 2;
        int length = 2;
        int columnNum = 2;
        printByteDump(strBuilder, data, offset, length, columnNum);
    }

    /**
     * writes message data to a buffer in hex format
     */
    public static void printByteDump(StringBuilder strBuilder, byte[] data,
            int offset, int length, int columnNum) {
        printByteDump(strBuilder, data, offset, length, columnNum, true);
    }

    /**
     * writes message data to a buffer in hex format
     */
    public static void printByteDump(StringBuilder strBuilder, byte[] data,
            int offset, int length, int columnNum, boolean hex) {
        int columnCount = 0;
        final int endIndex = offset + length;
        for (int i = offset; i < endIndex; i++) {
            if (columnCount == columnNum) {
                strBuilder.append('\n');
                columnCount = 0;
            }
            if (hex) {
                strBuilder.append(String.format("%02x ", data[i]));
            } else {

                strBuilder.append(data[i]).append(' ');
            }
            columnCount++;
        }
        strBuilder.append('\n');
    }

    public static void printByteDump(StringBuilder strBuilder,
            ByteBuffer data, int offset, int length, int columnNum) {
        int currentPosition = data.position();
        //      data.position(offset);
        int columnCount = 0;
        final int endIndex = offset + length;
        for (int i = offset; i < endIndex; i++) {
            if (columnCount == columnNum) {
                strBuilder.append('\n');
                columnCount = 0;
            }
            strBuilder.append(String.format("%02x ", data.get(i)));
            columnCount++;
        }
        strBuilder.append('\n');

        data.position(currentPosition);
    }
}

Related Tutorials