org.apache.poi.util
Class HexDump

java.lang.Object
  org.apache.poi.util.HexDump

public class HexDump
extends java.lang.Object

dump data in hexadecimal format; derived from a HexDump utility I wrote in June 2001.

Author:

Marc Johnson, Glen Stampoultzis (glens at apache.org)

Field Summary

static java.lang.String

EOL

Method Summary

static char[]	byteToHex(int value)
static java.lang.String	dump(byte[] data, long offset, int index) dump an array of bytes to a String
static void	dump(byte[] data, long offset, java.io.OutputStream stream, int index) dump an array of bytes to an OutputStream
static void	dump(byte[] data, long offset, java.io.OutputStream stream, int index, int length) dump an array of bytes to an OutputStream
static void	dump(java.io.InputStream in, java.io.PrintStream out, int start, int bytesToDump) Dumps bytesToDump bytes to an output stream.
static char[]	intToHex(int value)
static char[]	longToHex(long value)
static void	main(java.lang.String[] args)
static char[]	shortToHex(int value)
static java.lang.String	toHex(byte value) Converts the parameter to a hex value.
static java.lang.String	toHex(byte[] value) Converts the parameter to a hex value.
static java.lang.String	toHex(byte[] value, int bytesPerLine) Converts the parameter to a hex value breaking the results into lines.
static java.lang.String	toHex(int value) Converts the parameter to a hex value.
static java.lang.String	toHex(long value) Converts the parameter to a hex value.
static java.lang.String	toHex(short value) Converts the parameter to a hex value.
static java.lang.String	toHex(short[] value) Converts the parameter to a hex value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EOL

public static final java.lang.String EOL

Method Detail

dump

public static void dump(byte[] data,
                        long offset,
                        java.io.OutputStream stream,
                        int index,
                        int length)
                 throws java.io.IOException,
                        java.lang.ArrayIndexOutOfBoundsException,
                        java.lang.IllegalArgumentException

dump an array of bytes to an OutputStream

Parameters:

data - the byte array to be dumped

offset - its offset, whatever that might mean

stream - the OutputStream to which the data is to be written

index - initial index into the byte array

length - number of characters to output

Throws:

java.io.IOException - is thrown if anything goes wrong writing the data to stream

java.lang.ArrayIndexOutOfBoundsException - if the index is outside the data array's bounds

java.lang.IllegalArgumentException - if the output stream is null

dump

public static void dump(byte[] data,
                        long offset,
                        java.io.OutputStream stream,
                        int index)
                 throws java.io.IOException,
                        java.lang.ArrayIndexOutOfBoundsException,
                        java.lang.IllegalArgumentException

dump an array of bytes to an OutputStream

Parameters:

data - the byte array to be dumped

offset - its offset, whatever that might mean

stream - the OutputStream to which the data is to be written

index - initial index into the byte array

Throws:

java.io.IOException - is thrown if anything goes wrong writing the data to stream

java.lang.ArrayIndexOutOfBoundsException - if the index is outside the data array's bounds

java.lang.IllegalArgumentException - if the output stream is null

dump

public static java.lang.String dump(byte[] data,
                                    long offset,
                                    int index)

dump an array of bytes to a String

Parameters:

data - the byte array to be dumped

offset - its offset, whatever that might mean

index - initial index into the byte array

Returns:

output string

Throws:

java.lang.ArrayIndexOutOfBoundsException - if the index is outside the data array's bounds

toHex

public static java.lang.String toHex(byte[] value)

Converts the parameter to a hex value.

Parameters:

value - The value to convert

Returns:

A String representing the array of bytes

toHex

public static java.lang.String toHex(short[] value)

Converts the parameter to a hex value.

Parameters:

value - The value to convert

Returns:

A String representing the array of shorts

toHex

public static java.lang.String toHex(byte[] value,
                                     int bytesPerLine)

Converts the parameter to a hex value breaking the results into lines.

Parameters:

value - The value to convert

bytesPerLine - The maximum number of bytes per line. The next byte will be written to a new line

Returns:

A String representing the array of bytes

toHex

public static java.lang.String toHex(short value)

Converts the parameter to a hex value.

Parameters:

value - The value to convert

Returns:

The result right padded with 0

toHex

public static java.lang.String toHex(byte value)

Converts the parameter to a hex value.

Parameters:

value - The value to convert

Returns:

The result right padded with 0

toHex

public static java.lang.String toHex(int value)

Converts the parameter to a hex value.

Parameters:

value - The value to convert

Returns:

The result right padded with 0

toHex

public static java.lang.String toHex(long value)

Converts the parameter to a hex value.

Parameters:

value - The value to convert

Returns:

The result right padded with 0

dump

public static void dump(java.io.InputStream in,
                        java.io.PrintStream out,
                        int start,
                        int bytesToDump)
                 throws java.io.IOException

Dumps bytesToDump bytes to an output stream.

Parameters:

in - The stream to read from

out - The output stream

start - The index to use as the starting position for the left hand side label

bytesToDump - The number of bytes to output. Use -1 to read until the end of file.

Throws:

java.io.IOException

longToHex

public static char[] longToHex(long value)

Returns:

char array of 4 (zero padded) uppercase hex chars and prefixed with '0x'

intToHex

public static char[] intToHex(int value)

Returns:

char array of 4 (zero padded) uppercase hex chars and prefixed with '0x'

shortToHex

public static char[] shortToHex(int value)

Returns:

char array of 2 (zero padded) uppercase hex chars and prefixed with '0x'

byteToHex

public static char[] byteToHex(int value)

Returns:

char array of 1 (zero padded) uppercase hex chars and prefixed with '0x'

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

Throws:

java.lang.Exception