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I am trying to make a changelog that gets updated at runtime, now, I would like to download the changelog from my website, and then display it.
How would I do this?
By the way, I just want to read the file (something like when browsers ask you do you want to save or run this file?, not save it.
Thanks.
You can open the input stream from the URI in Java as follows. Replace InputStreamReader with other implementations as per your need. Once you have the reader, you should be able to read the data from the stream.
InputStream stream = new URI('http://path-to-file').toURL().openStream();
BufferedReader r = new BufferedReader(new InputStreamReader(stream));
String content = "";
while((content = r.readLine()) != null) {
System.out.println(content); // you can put custom logic here.
}
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I am developing a java swing based application which show thumbnail of any format(jpg,png) images. For that, at first I read the image file by ImageIO.read(file name) and then create thumbnail of it. But it shows null pointer exception when read PSD format file.
I use ideli library for read PSD type file but it requires subcription/paid. So there have any free library to read PSD type file in Java?
image = ImageIO.read(new File(i));
thumb = Thumbnails.of(image).size(140,100).outputFormat("png").asBufferedImage();
ImageIO.write(thumb, "png", new File("thumb.png"));
By above code, I can read (without PSD) image file and create thumbnail of image.
Have a read of the documentation, PSD is not a supported format.
You might find some value from a similar question here.
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I need to generate a valid dictionary word of certain length but in a random fashion. Is there an api or code snippet that does this? I tried googling it but couldn't find anything for this.
Thanks
You can download this .csv file which has around 200 thousand English words.
You can then parse the .csv file, add the entries to an ArrayList. Then create a function that randomly generates a number between the available indices of the ArrayList and then use it to get an entry at that random index. Or, you can think of something alike yourself.
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Are there any good java libraries for parsing & dealing with proprietary messages in UDP size packets? The message is a simple byte array, where each byte(s) represents enums or text/ascii values.
You could also use a ByteBuffer to wrap your byte[]
Use DataInputStream to read the type of data you want if it fits the conversions (i.e. when reading an int check the endianess used by DataNIputStream matches your platform), wrapped around a ByteArrayInputStream directly fed by your byte array.
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Is there any Java API to get the font name from a font file (TTF)?
Sure, the java.awt.Font class will handle this task just fine. Here's how:
Font f = Font.createFont(Font.TRUETYPE_FONT, new FileInputStream("font.ttf"));
String name = f.getName();
(I tried it on one of the ttf-fonts on my system and it works as intended.)
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Is there any code(specifically Java or C++) or software in which we import any image and it gives the outline of that image in points, which we can use again to draw image outline by joining those points in JOGL or OPenGL ..
There's an outline tracer in Inkscape (which is open source c++).
http://inkscape.org/doc/tracing/tutorial-tracing.html
This will convert to vector format - so you could get some points out this way.
EDIT: this actually uses http://potrace.sourceforge.net/ for the tracing..
Here is an example code in MATLAB:
%# read image
I = imread('coins.png');
%# Convert to a binary image
BW = im2bw(I, graythresh(I));
%# get object boundaries
BW = imfill(BW,'holes');
B = bwboundaries(BW,'noholes');
%# plot boundaries overlayed on top of image
imshow(I), hold on
for i=1:numel(B)
plot(B{i}(:,2), B{i}(:,1), 'Color','g', 'LineWidth',2)
end
hold off