java官方教程

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java教程

http://docs.oracle.com/javase/tutorial/

 

反射

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

 

泛型

http://docs.oracle.com/javase/tutorial/java/generics/index.html

 

集合

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

 

并发

http://docs.oracle.com/javase/tutorial/essential/concurrency/index.html