Java Printing page size problem

Java has a very flexible printing system called JPS which makes printing very easy. Any JComponent can be made to print its contents by adding a print method public int print(Graphics graphics, PageFormat pf, int page) throws PrinterException {} When Java needs to print, it calls this method and whatever you paint onto the graphics…

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Java Memory leaks with FileChannel

It is a myth that Java has no ‘memory leaks’. It is certainly much better than developing in C and many of the gotchas do not exist in Java. But there are still potential memory issues in Java. For example, we have been looking at using FileChannel. This allows the developer to have only part…

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Saving Java images as Tifs wth JAI

Java makes it very easy to create images as BufferedImages which can then be saved out in standard image file formats. Here is the code to save an image as a Tif image using the JAI image (a free library from Sun). com.sun.media.jai.codec.TIFFEncodeParam params = new com.sun.media.jai.codec.TIFFEncodeParam(); FileOutputStream os = new FileOutputStream(outputDir + imageName+”.tif”); javax.media.jai.JAI.create(“encode”,…

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Open Source licensing

Update: Since writing this article, we have changed the license used for JPedal from GPL to LGPL. This means you can use the unsupported Open Source version of JPedal in any software. The article itself is still very relevent to Open Source software in general. We found a site belonging to a major University in…

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