Java Array Dump dumpAsHex(byte[] byteBuffer, int length)

Description

Dumps the given bytes to STDOUT as a hex dump (up to length bytes).

License

Open Source License

Parameter

Parameter	Description
byteBuffer	the data to print as hex
length	the number of bytes to print

Return

...

Declaration

public static final String dumpAsHex(byte[] byteBuffer, int length) 

Method Source Code

//package com.java2s;
/**//  w  w  w. j av a  2s.  c om
 * <pre>
 *    This program is free software; you can redistribute it and/or modify it under the terms of 
 * the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, 
 * or (at your option) any later version. 
 * 
 *    This program is distributed in the hope that it will be useful, 
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
 * See the GNU General Public License for more details. 
 *    You should have received a copy of the GNU General Public License along with this program; 
 * if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 * </pre>
 */

public class Main {
    /**
     * Dumps the given bytes to STDOUT as a hex dump (up to length bytes).
     * 
     * @param byteBuffer the data to print as hex
     * @param length the number of bytes to print
     * @return ...
     */
    public static final String dumpAsHex(byte[] byteBuffer, int length) {
        StringBuffer outputBuf = new StringBuffer(length * 4);

        int p = 0;
        int rows = length / 8;

        for (int i = 0; (i < rows) && (p < length); i++) {
            int ptemp = p;

            for (int j = 0; j < 8; j++) {
                String hexVal = Integer.toHexString(byteBuffer[ptemp] & 0xff);

                if (hexVal.length() == 1) {
                    hexVal = "0" + hexVal; //$NON-NLS-1$
                }

                outputBuf.append(hexVal + " "); //$NON-NLS-1$
                ptemp++;
            }

            outputBuf.append("    "); //$NON-NLS-1$

            for (int j = 0; j < 8; j++) {
                int b = 0xff & byteBuffer[p];

                if (b > 32 && b < 127) {
                    outputBuf.append((char) b + " "); //$NON-NLS-1$
                } else {
                    outputBuf.append(". "); //$NON-NLS-1$
                }

                p++;
            }

            outputBuf.append("\n"); //$NON-NLS-1$
        }

        int n = 0;

        for (int i = p; i < length; i++) {
            String hexVal = Integer.toHexString(byteBuffer[i] & 0xff);

            if (hexVal.length() == 1) {
                hexVal = "0" + hexVal; //$NON-NLS-1$
            }

            outputBuf.append(hexVal + " "); //$NON-NLS-1$
            n++;
        }

        for (int i = n; i < 8; i++) {
            outputBuf.append("   "); //$NON-NLS-1$
        }

        outputBuf.append("    "); //$NON-NLS-1$

        for (int i = p; i < length; i++) {
            int b = 0xff & byteBuffer[i];

            if (b > 32 && b < 127) {
                outputBuf.append((char) b + " "); //$NON-NLS-1$
            } else {
                outputBuf.append(". "); //$NON-NLS-1$
            }
        }

        outputBuf.append("\n"); //$NON-NLS-1$

        return outputBuf.toString();
    }

    public static String toString(byte[] bytes) {
        if (bytes == null || bytes.length == 0)
            return "";
        StringBuffer buffer = new StringBuffer();
        for (byte byt : bytes) {
            buffer.append((char) byt);
        }
        return buffer.toString();
    }

    public static String toString(Object[] objs) {
        if (objs == null || objs.length == 0)
            return "[]";
        StringBuffer buffer = new StringBuffer("[");
        for (int i = 0; i < objs.length; i++) {
            buffer.append(String.valueOf(objs[i]));
            if (i != objs.length - 1) {
                buffer.append(",");
            }
        }

        buffer.append("]");
        return buffer.toString();
    }
}

Related

1. dumpArray(String msg, float[][] A, int x1, int x2, int y1, int y2)
2. dumpArray(String msg, Object[] refs)
3. dumpArray(T[] ts)
4. dumpArrayHex(byte b[])
5. dumpAsciiChars(byte[] b, int blen)
6. dumpAsHex(byte[] src, int length)
7. dumpCharCharArray(String msg, char[][] o)
8. dumpData(byte data[])
9. dumpFirst1024Byte(byte[] data)