Java-Training

This repository provides teaching materials for Java training.

Getting Started

Following issues are introduced step by step at each commit. Please use the links provided to see code examples of the aforementioned issue.

First Code

• Hello World example for calling a java program from terminal.

Core Concepts of Java

• Variables are described. Primitive & Hierarchical types are examplified.
• Methods are described for return types and void types.
• Packages, which allows storing classes in their respected package hierarchy, is introduced.
• Access Modifiers, which allows classes, methods, and variables visibility from different packages, classes, and methods, are introduced.
• Program Flow using following capabilities are introduced:
  • Arithmetic operators can be found in Arithmetic Operators Package
  • Assignment operators can be found in Assignment Operators Package
  • Relational operators can be found in Relational Operators Package
  • Logical operators can be found in Logical Operators Package
  • Decision operators can be found in Decision Operators Package
• Exceptions is examplified using mathematical operands and tested via unit tests.
• Constructors are defined. Default constructor and custom constructors are introduced.

Object Oriented Java

• Classes & Objects A simple code for creating a class and and instantiating objects. (New keyword: static)
• Object Oriented Concepts
  • Aggregation concepts introduced in the Aggregation Package. (Test classes are under here)
  • Inheritence concepts introduced in the Inheritance Package. (Test classes are under here) (New keywords: extends, and instanceof)
  • Polymorphism concepts introduced in the Polymorphism Package. (Test classes are under here) (New keywords: @Override, final, this, and super)
  • Abstraction concepts introduced in the Abstraction Package. (Test classes are under here) (New keywords: interface, abstract, and implements)

Common Java Classes

• Enumeration class is introduced with example cases. (New keywords: enum, and ordinal)
• String class is introduced with example cases. (New keywords: String, StringBuilder and StringBuffer)
• Pattern and Matcher class is introduced with example cases. (New keywords: Pattern, Matcher, group, compile and regex)
• Date and Calendar class is introduced with example cases. (New keywords: Date, before, after, getDisplayname, and Gregorian Calendar)

Advanced Concepts of Java

• Collections is introduced with its application classes.
  • List concept and its application classes are in the Arrays & Lists Package. (Test classes are under here) (New keywords: Array, List, LinkedList and ArrayList)
  • Queue concept and its application classes are in the Queues Package. (Test classes are under here) (New keywords: Queue, ArrayQueue, PriorityQueue and Stack)
  • Set concept and its application classes are in the Sets Package. (Test classes are under here) (New keywords: Set, HashSet, and TreeSet)
  • Collections real world example cases can be found here.
• Lambda is introduced. (New keywords: @FunctionalInterface, lambda, and runnable)
• Streams is introduced with its application classes. (New keywords: Stream, foreach, filter, count, limit, IntStream, and much more)
• File Input and Output is introduced with file interactions. (New keywords: File, FileOutputStream, FileInputStream, FileWriter, FileReader, BufferedReader, and much more)
• Localization is introduced with file interactions. (New keywords: NumberFormat, DateTimeFormatter, and Locale)

Concurrency & Multithreading

• Threads are introduced. (New Keywords: Thread, ThreadGroups, Priorities, start, run, and synchronized)
  • Thread Synchronization, multithreading, and concurrency is introduced via examples (New Keywords: ThreadFactory, sleep, wait, notify, and notifyAll)
    • Sleep vs Wait explained.
    • Object locks explained
    • Deadlock problem explained

JDBC

• Java Database Connectivity is introduced. (New Keywords: JDBC, SQL, Connection, and Database)

Frameworks

Hibernate

• Hibernate is introduced. (New Keywords: Session Factory, Session, Transaction, and Annotations)