Java® Language Specification

Java™ Platform, Standard Edition 8 API Specification

http://docs.oracle.com/javase/8/docs/api/

The Java® Language Specification

http://docs.oracle.com/javase/specs/jls/se8/html/index.html

The Java® Virtual Machine Specification

http://docs.oracle.com/javase/specs/jvms/se7/html/

The Java EE 6

http://docs.oracle.com/javaee/6/

The Reflection API

http://docs.oracle.com/javase/tutorial/reflect/index.html

javadoc - The Java API Documentation Generator

http://docs.oracle.com/javase/7/docs/technotes/tools/windows/javadoc.html

Oracle® JRockit Command-Line Reference

https://docs.oracle.com/cd/E13150_01/jrockit_jvm/jrockit/jrdocs/refman/intro.html

-X Command-line Options

https://docs.oracle.com/cd/E13150_01/jrockit_jvm/jrockit/jrdocs/refman/optionX.html

Java HotSpot VM Options -XX

https://www.oracle.com/java/technologies/javase/exactoptions-jsp.html

https://www.oracle.com/partners/campaign/vmoptions-jsp-140102.html

Learning the Java Language

https://docs.oracle.com/javase/tutorial/java/index.html

The Java™ Tutorials

https://docs.oracle.com/javase/tutorial/index.html

J2EE Best Practices

https://docs.oracle.com/cd/A97688_16/generic.903/bp/j2ee.htm

Garbage Collection Tuning Guide

https://www.oracle.com/technetwork/java/javase/gc-tuning-6-140523.html (single page, including detail description e.g. -verbose:gc)

https://docs.oracle.com/javase/8/docs/technotes/guides/vm/gctuning/

Java SE HotSpot

https://www.oracle.com/technetwork/java/javase/tech/index-jsp-136373.html

https://www.oracle.com/partners/campaign/vmoptions-jsp-140102.html

java.exe options

https://docs.oracle.com/javase/8/docs/technotes/tools/windows/java.html

Java I/O, NIO, and NIO.2

https://docs.oracle.com/javase/8/docs/technotes/guides/io/index.html

Java Specification Requests list

https://www.jcp.org/en/jsr/all

https://www.jcp.org/en/jsr/overview

The java Command

https://docs.oracle.com/en/java/javase/17/docs/specs/man/java.html