public class HexDump
extends java.lang.Object
Provides a single function to take an array of bytes and display it in hexadecimal form.
Origin of code: POI.
Modifier and Type | Field and Description |
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private static char[] |
_hexcodes |
private static int[] |
_shifts |
static java.lang.String |
EOL
The line-separator (initializes to "line.separator" system property.
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Constructor and Description |
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HexDump()
Instances should NOT be constructed in standard programming.
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Modifier and Type | Method and Description |
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static void |
dump(byte[] data,
long offset,
java.io.OutputStream stream,
int index)
Dump an array of bytes to an OutputStream.
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private static java.lang.StringBuilder |
dump(java.lang.StringBuilder _cbuffer,
byte value)
Dump a byte value into a StringBuilder.
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private static java.lang.StringBuilder |
dump(java.lang.StringBuilder _lbuffer,
long value)
Dump a long value into a StringBuilder.
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public static final java.lang.String EOL
private static final char[] _hexcodes
private static final int[] _shifts
public HexDump()
public static void dump(byte[] data, long offset, java.io.OutputStream stream, int index) throws java.io.IOException, java.lang.ArrayIndexOutOfBoundsException, java.lang.IllegalArgumentException
The offset argument specifies the start offset of the data array within a larger entity like a file or an incoming stream. For example, if the data array contains the third kibibyte of a file, then the offset argument should be set to 2048. The offset value printed at the beginning of each line indicates where in that larger entity the first byte on that line is located.
All bytes between the given index (inclusive) and the end of the data array are dumped.
data
- the byte array to be dumpedoffset
- offset of the byte array within a larger entitystream
- the OutputStream to which the data is to be
writtenindex
- initial index into the byte arrayjava.io.IOException
- is thrown if anything goes wrong writing
the data to streamjava.lang.ArrayIndexOutOfBoundsException
- if the index is
outside the data array's boundsjava.lang.IllegalArgumentException
- if the output stream is nullprivate static java.lang.StringBuilder dump(java.lang.StringBuilder _lbuffer, long value)
_lbuffer
- the StringBuilder to dump the value invalue
- the long value to be dumpedprivate static java.lang.StringBuilder dump(java.lang.StringBuilder _cbuffer, byte value)
_cbuffer
- the StringBuilder to dump the value invalue
- the byte value to be dumped