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by another_twist 224 days ago
Docs of java.util.concurrent would be my suggestion. And go straight into the wild and try to build a system that solves the billion rows challenge. You might want to truncate the input and start with a million row challenge first.

The cool stuff in concurrency is not having to deal with it imoand recognizing when its not essential. Also I hope you mean concurrency not parallelism. The second one is a bit more manageable.