BMP to JPEG Conversion

How do convert BMP file to JPEG format in java? Our application uses AWT and Swing classes. Thanks,Madan Shah

[151 byte] By [MadanShaha] at [2007-11-27 2:40:20]

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# 1

look at ImageIO package

MaxxDmga at 2007-7-12 3:03:08 >

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# 2

Example code using files.

File in = new File("bmp filespec");

File out = new File("jpg filespec");

BufferedImage bufi;

try

{

bufi = ImageIO.read(in);

ImageIO.write(bufi, "jpg", out);

}

catch (IOException ex)

{

ex.printStackTrace();

}

ChuckBinga at 2007-7-12 3:03:08 >

# 3

Thanks. Is Java ImageIO library part of standard java JRE? What version of JRE Image IO class was introduced?

MadanShaha at 2007-7-12 3:03:08 >

# 4

http://java.sun.com/javase/6/docs/api/javax/imageio/ImageIO.html

jawadhashmia at 2007-7-12 3:03:08 >

# 5

Thanks for the code. It works well when I run it in JRE 1.6 but fails in JRE1.4 with a NullPointerException. The problem is with this line:?br>

bufi = ImageIO.read(in);

I believe JDK1.4 does not support reading a bmp file format. Is this the problem? And if so, is there a Java work-around apart from migrating to JDK 1.5 or 1.6?

MadanShaha at 2007-7-12 3:03:08 >

# 6

ImageIO uses a service provider pattern for its ImageReaders and ImageWriters.You could look into this. Perhaps the Java Advanced Image I/O download includes readers and writers for BMP files.

DrLaszloJamfa at 2007-7-12 3:03:09 >

# 7

Here's a link: https://jai-imageio.dev.java.net/it looks like it includes BMP.

DrLaszloJamfa at 2007-7-12 3:03:09 >

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