Package org.jfree.chart.encoders

Class SunJPEGEncoderAdapter

java.lang.Object
org.jfree.chart.encoders.SunJPEGEncoderAdapter
All Implemented Interfaces:
ImageEncoder
public class SunJPEGEncoderAdapter extends Object implements ImageEncoder
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+.

  • Constructor Summary

    Constructors
    Constructor
    Description
    SunJPEGEncoderAdapter()
    Creates a new SunJPEGEncoderAdapter instance.

  • Method Summary

    Modifier and Type
    Method
    Description
    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.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

  • Method Details

    • getQuality

      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.
      Specified by:
      getQuality in interface ImageEncoder
      Returns:
      A float representing the quality, in the range 0.0f to 1.0f.
      See Also:

    • setQuality

      public void setQuality(float quality)
      Set the quality of the image encoding.
      Specified by:
      setQuality in interface ImageEncoder
      Parameters:
      quality - A float representing the quality (in the range 0.0f to 1.0f).
      See Also:

    • isEncodingAlpha

      public boolean isEncodingAlpha()
      Returns false always, indicating that this encoder does not encode alpha transparency.
      Specified by:
      isEncodingAlpha in interface ImageEncoder
      Returns:
      false.

    • setEncodingAlpha

      public void setEncodingAlpha(boolean encodingAlpha)
      Set whether the encoder should encode alpha transparency (this is not supported for JPEG, so this method does nothing).
      Specified by:
      setEncodingAlpha in interface ImageEncoder
      Parameters:
      encodingAlpha - ignored.

    • encode

      public byte[] encode(BufferedImage bufferedImage) throws IOException
      Encodes an image in JPEG format.
      Specified by:
      encode in interface ImageEncoder
      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.

    • encode

      public void encode(BufferedImage bufferedImage, OutputStream outputStream) throws IOException
      Encodes an image in JPEG format and writes it to an output stream.
      Specified by:
      encode in interface ImageEncoder
      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.