Question

I want to open libraries, because currently I want to see the algorithms used for drawing, modify them and implement them in my program. For example: I have tried to create an algorithm on my own for lines. But I failed. And even if I had succeeded, I fear that it might not give the same result as the algorithm in the libraries. And I don’t want this to happen. That’s why I want to copy the algorithms used for the methods in libraries. And I really hope that this will help me create the application I’m currently working on and with other applications in the future.

I tried to open the libraries with a code editor. But I had troubles finding the libraries- I don’t really know where are they placed nor in what files are their codes stored.

How to open a Java library? Or is there a place in the Internet where the code is uploaded?

Answer 1

For any given library:

Make sure to obey all licenses when using another’s code

• If you are referring to the Java SDK source code, you can find it here: http://grepcode.com/
• If the project is open source, you can usually just get the source from the project website. No problem, though make sure to obey their license.
• If the project is NOT open source, well, then you’re in a pickle licensing wise, so I do NOT endorse this, however, you would need to use a Java Decompiler such as JD-Gui

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As far as what drawing algorithms to use, there are so many different ones (obviously, people have been trying to draw quickly for many many years), your best bet is to figure out exactly what you need to do and then search for that specific need separately. There isn’t really a good repository of ALL of them, except maybe wikipedia.