Java Checklist:

Basics

Classes

• Constructors
• fields
• Access Modifiers - public, protected, private
• Nested Classes
• Anonymous Classes
• Lambda References

Interfaces

• Creation

Enums

• Creation

Variables

• Fields
• static variables
• constants

Data types

• Predefined objects
• User defined
• Primitive data types
• Arrays

Control Statements

• If, else, else if
• Switch
• While loop
• For loop
• Improved for loop
• Return, Break, Continue

Methods

• Static, instance
• Return

Annotations

• Creation
• Predefined Annotation Types

Inheritance

• Overriding
• Super, subclasses
• Extends vs Implements

Strings

• Formatting
• String methods

Generics

TODO: add...

Packages

• Creating packages
• Compiling classes manually
• CLASSPATH

Exceptions

• Try, catch, finally
• Checked vs unchecked exceptions

I/O

• Streams
• Character streams (Know the difference between byte and character streams)
• Writer/Readers
• Buffers
• Paths - abstract, canonical
• Working with files

Environment

• Java Properties
• System Properties
• Environment Variables
• CLASS and CLASSPATH
• Security Manager
• Storing using YAML

REGEX

• Regular Expressions

Date Time

• Joda

Deployment

• What a jar files is
• How to create a jar file manually
• Manifest Files

Unit Tests

• Test Driven Development Concepts
• JUNIT

Java tuts for most of this info here.

Advanced Stuff

Binary mastery

• Bit shifting
• Encoding standards

Concurrency

• Threads, Runnable Class
• Synchronization, volatile, atomic
• Locks

Data structures - TODO expand

• Lists
• Queues
• Maps
• Sets
• ETC
• Collections
  • Difference between the underlying data type and collections library

Algorithms - TODO expand

• Sorting Algorithms
• Search algorithms
• Time algs take

Creating JavaDocs

• How to generate
• Doc comments
• @param
• @throws
• @return

Using external Libraries

• Using *
• Importing libraries
• Using APIS
• Working with maven

Swing

• Components
• Events
• Listeners
• Layout managers

JavaFX

• Listeners
• Buttons
• Styles (CSS, inline)

Networking

• More coming later.
• POST, GET HTTP commands
• Basic networking
  • IP addresses, subnet masks, DNS
  • OSI model
    • Protocols, Transport (UDP/ TCP) vs Application (HTTP)

Build Control

• Building, deployment
• Maven
  • Plugins, Goals
  • Build lifecycle
  • Basic XML
  • Maven structure
  • Gradle
  • No clue.

Source Control

• Git
• GitHub
• Basic Commands
• svn (If your job forces you)

Frameworks / Web Dev

• Java EE concepts
  • Servlets
  • JSP
  • Containers
  • Spring (Server Backend)
    • REST features
    • Dependency injection
    • MVC systems
      • Freemarker (For view)
• Spark
• Web containers (Tomcat / Jetty)
• REST Concepts
  • Jax-RS (RESTEasy)
• SOAP concepts
• XML

Persistency

• SQL
  • mySQL
  • JDBC
• JPA
  • Hibernate
    • EclipseLink

Serialization

• JSON