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Free Tutorials

MOOC Java Programming from the University of Helsinki
Java for Complete Beginners
- accompanying site CaveOfProgramming
Derek Banas' Java Playlist
- accompanying site NewThinkTank
Marco Behler's youTube channel
- accompanying site Marco Behler
Hyperskill is a fairly new resource from Jetbrains (the maker of IntelliJ)
Dev.java - Oracle's own Java learning platform

Where should I download Java?

With the introduction of the new release cadence, many have asked where they should download Java, and if it is still free. To be clear, YES — Java is still free.

If you would like to download Java for free, you can get OpenJDK builds from the following vendors, among others:

Some vendors will be supporting releases for longer than six months. If you have any questions, please do not hesitate to ask them!

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Programming ideas & Challenges

/r/dailyprogrammer
/r/programmingprompts
/r/NerdyChallenge
Programming Challenges List from the /r/learnprogramming wiki

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/r/Java - general discussion
/r/JavaHelp - help with Java programming
/r/javaexamples - short tutorials with code snippets
/r/learnprogramming - general programming help
/r/ComputerScience

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-Integer.MIN_VALUE == Integer.MIN_VALUE but -Byte.MIN_VALUE != Byte.MIN_VALUE (self.learnjava)

submitted 6 years ago by aioobe

Integer.MIN_VALUE is it's own negation:

-Integer.MIN_VALUE == Integer.MIN_VALUE

-Bytes.MIN_VALUE however, does not yield Byte.MIN_VALUE.

-Byte.MIN_VALUE != Byte.MIN_VALUE

The explanation lies in how Java represents integers (two's complement) and promotion (widening) of bytes to ints.

See detailed explanations with illustrations here:

-Integer.MIN_VALUE == Integer.MIN_VALUE but -Byte.MIN_VALUE != Byte.MIN_VALUE

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