public class

SunJPEGEncoderAdapter

extends Object
implements ImageEncoder
java.lang.Object
   ↳ org.jfree.chart.encoders.SunJPEGEncoderAdapter

Class Overview

Adapter class for the Sun JPEG Encoder. The ImageEncoderFactory will only return a reference to this class by default if the library has been compiled under a JDK 1.4+ and is being run using a JRE 1.4+.

Summary

Public Constructors
SunJPEGEncoderAdapter()
Creates a new SunJPEGEncoderAdapter instance.
Public Methods
byte[] encode(BufferedImage bufferedImage)
Encodes an image in JPEG format.
void encode(BufferedImage bufferedImage, OutputStream outputStream)
Encodes an image in JPEG format and writes it to an output stream.
float getQuality()
Returns the quality of the image encoding, which is a number in the range 0.0f to 1.0f (higher values give better quality output, but larger file sizes).
boolean isEncodingAlpha()
Returns false always, indicating that this encoder does not encode alpha transparency.
void setEncodingAlpha(boolean encodingAlpha)
Set whether the encoder should encode alpha transparency (this is not supported for JPEG, so this method does nothing).
void setQuality(float quality)
Set the quality of the image encoding.
[Expand]
Inherited Methods
From class java.lang.Object
From interface org.jfree.chart.encoders.ImageEncoder

Public Constructors

public SunJPEGEncoderAdapter ()

Creates a new SunJPEGEncoderAdapter instance.

Public Methods

public byte[] encode (BufferedImage bufferedImage)

Encodes an image in JPEG format.

Parameters
bufferedImage the image to be encoded (null not permitted).
Returns
  • The byte[] that is the encoded image.
Throws
IOException if there is an I/O problem.
NullPointerException if bufferedImage is null.

public void encode (BufferedImage bufferedImage, OutputStream outputStream)

Encodes an image in JPEG format and writes it to an output stream.

Parameters
bufferedImage the image to be encoded (null not permitted).
outputStream the OutputStream to write the encoded image to (null not permitted).
Throws
IOException if there is an I/O problem.
NullPointerException if bufferedImage is null.

public float getQuality ()

Returns the quality of the image encoding, which is a number in the range 0.0f to 1.0f (higher values give better quality output, but larger file sizes). The default value is 0.95f.

Returns
  • A float representing the quality, in the range 0.0f to 1.0f.
See Also

public boolean isEncodingAlpha ()

Returns false always, indicating that this encoder does not encode alpha transparency.

Returns
  • false.

public void setEncodingAlpha (boolean encodingAlpha)

Set whether the encoder should encode alpha transparency (this is not supported for JPEG, so this method does nothing).

Parameters
encodingAlpha ignored.

public void setQuality (float quality)

Set the quality of the image encoding.

Parameters
quality A float representing the quality (in the range 0.0f to 1.0f).
See Also