Java, learning path

1. OOP and its concepts in java (bold are OOP features)

Class

Object

Inheritance

Methods

Abstraction

Polymorphism

Encapsulation

Packages

2. How Java Works

Java Virtual Machine + Java API (s): Load Java class by Class loader, each program written in Java will has only one class loader.

3. History:

From 1.4.2:

From Java 1.5:

Generic

Anotation

Auto boxing

Java 1.6

Java 1.7:

Updated some collection framework's features with more performance

3. Start from Scratch

Core API(s): Java IO, Java Network, Thread, Collection Frameworks

Java and Database: JDBC

Desktop application: JFX Or Swing (Optional)

WEB:JSP + Servlet

4. More

Design Patterns:

Creational

Singleton, Factory...

Behavioral

Structural

Frame Works: Java Server Faces, Strut, Spring, Hibernate...

Technology: Enterprise Java Beans, WebServices...

Portal (If necessary): Liferay (OpenSource Portal), WebSphere Portal, Oracle Weblogic Portal (more popular)

Other: