Oracle's official Java Tutorials are a free, self-paced online guide to the Java language and its core libraries, with short lessons and review questions. The tutorials cover Java basics through more advanced topics.

Commenters call them comprehensive and very good, with one noting the question sections are good, though it has some questionable bits.

On Reddit (2)

1. Strongly recommendsLerker/learnprogramming2014in “I start my first programming class in 2 weeks.”▲ 2

   There are many online resources about Java and programming fundamentals. A lot of these have existed for many years and are hence of much higher quality than anything anyone could quickly write up in a Reddit post. I'd encourage you to check out one of the many available resources on the internet…

2. RecommendsTechAnd1r/learnprogramming2014in “I want to learn Java, but don't know where to start.”▲ 1

   I've just started learning Java and I've found some resources that I think are good. Oracle tutorials - they have some questionable bits in there but over all they're pretty comprehensive and the question sections are good Udemy - there are some different bits and pieces but I'd recommend the free…

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