JPEGHuffmanTable JDK 1.6)

Description

public class JPEGHuffmanTable

A class encapsulating a single JPEG Huffman table.

See also:

Constructors

private JPEGHuffmanTable ()

Private constructor used to construct the Standard Huffman tables

public JPEGHuffmanTable (short[] lengths, short[] values)

Creates a Huffman table and initializes it.

Creates a Huffman table and initializes it. The input arrays
are copied. The arrays must describe a possible Huffman table.
For example, 3 codes cannot be expressed with a single bit.
Parameters:
- lengths - an array of shorts where lengths[k] is equal to the number of values with corresponding codes of length k + 1 bits.
- values - an array of shorts containing the values in order of increasing code length.
Throws:
- IllegalArgumentException - if lengths or values are null, the length of lengths is greater than 16, the length of values is greater than 256, if any value in lengths or values is less than zero, or if the arrays do not describe a valid Huffman table.

Methods

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public short getLengths ()

Return an array of shorts containing the number of values for each length in the Huffman table.

Return an array of shorts containing the number of
values for each length in the Huffman table. The returned
array is a copy.
Returns: a short array where array[k-1] is equal to the number of values in the table of length k.
See Also: JPEGHuffmanTable.getValues(),

public short getValues ()

Return an array of shorts containing the values arranged by increasing length of their corresponding codes.

Return an array of shorts containing the
values arranged by increasing length of their corresponding
codes. The interpretation of
the array is dependent on the values returned from
getLengths. The returned array is a copy.
Returns: a short array of values.
See Also: JPEGHuffmanTable.getLengths(),

public String toString ()

Fields

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publicfinalstatic JPEGHuffmanTable StdACChrominance

The standard AC chrominance Huffman table.

publicfinalstatic JPEGHuffmanTable StdACLuminance

The standard AC luminance Huffman table.

publicfinalstatic JPEGHuffmanTable StdDCChrominance

The standard DC chrominance Huffman table.

publicfinalstatic JPEGHuffmanTable StdDCLuminance

The standard DC luminance Huffman table.