Mastering Java For Beginners

This repository includes Java Core Course Materials for Mastering Java For Beginners

Why Java?

Currently, Java is the 2^nd most popular Programming language according to PYPL.

Java has wide variety of applications including but not limited to;

• Web development
• Banking
• Financial Services
• Big Data
• Android Application

As a result, it can be said that java is a trending topic.

Installing Tools

Here is the list of tools that is used in conjunction with this repository

• Java Development Kit JDK
• IntelliJ IDEA

Getting Started

Following items are covered in their respected links. Please use the link provided to access given course materials.

Variables

• This section covers variables and casting of variable types to each other with examples in java.
  • Source code can be found in here.
  • Issues tackled: variable, parameter, field, local variable, casting.
• Coding Examples: Addition and Division operations for int values.
  • Source code can be found in here.
• Coding Exercise: Multiplication operation for int values.
  • Source code can be found in here.

Methods

• This section covers declaring and using methods with examples in java. Also provides insight to JavaDocs.
  • Source code can be found in here.
  • Issues tackled: method, return, @param, @return.

Packages

• This section covers declaring and using packages with same named java classes.
  • Source code can be found in here.
  • Issues tackled: package, import.

Modifiers

• This section covers access modifiers for classes, methods, and fields.
  • Source code can be found in here.
  • Issues tackled: public, protected, private.
• Also, non-access modifiers are briefly mentioned without any use cases.
  • Issues introduced: final, static, abstract, synchronized, volatile.

Program Flow

• This section covers Operators & Decision-Making concepts.
  • Source code can be found in here.

Operators

• Operators consist of arithmetic, bitwise, logical, assignment, and relational operators.
  • Arithmetic operators issues tackled: +, -, *, /, %, ++, --.
  • Bitwise operators issues tackled: <<, >>, <<<, &, |, ^.
  • Logical operators issues tackled: &&, ||, ==.
  • Assignment operators issues tackled: =, +=, -=, *=, /=, %=, &=, |=, ^=, <<=, >>=.
  • Relational operators issues tackled: <, >, <=, >=, !=, ==.

Decision-Making

• Decision-making concepts consist of if ... else and switch cases, loops, and loop control statements.
  • If .. else statement issues tackled: if, if .. else, if .. else if .. else, switch.
  • Loop issues tackled: for, for each, while, do .. while.
  • Loop control statement issues tackled: break, continue.
• Coding Example: Matching Parenthesis checker for String inputs and token generator from String inputs.
  • Source code can be found in here

Constructors

• This section covers default constructors, how to define custom constructors, and use cases.
  • Source code can be found in here.
  • Issues tackled: public, protected, private constructors, and final variables.

Object vs. Class

• This section covers the definition of class, object and its implementations.
  • Source code can be found in here.
  • Issues tackled: static.

Specialized Java Classes

• This section describes special Java Classes, mainly Enumerations and Records. These special classes generates their respective boilerplate code automatically.

Enumerations

• This section covers enumerations in java, basically a specialized list of objects.
  • Source code can be found in here.
  • Issues tackled: enum.

Records

• This section covers Records introduced in Java 16, basically a class with immutable fields.
  • Source code can be found in here.
  • Issues tackled: record.

Object-Oriented Programming

• This section covers the object-oriented programming capabilities of Java.
  • Abstraction concept details introduced: abstract, interface, default
  • Inheritance concept details introduced: extend, instanceof, super, this
  • Polymorphism concept details introduced: @Override
  • Encapsulation concept investigated in detail.

Exceptions

• This section covers throwing and handling exceptions in Java
  • Source code can be found in here.
  • Issues tackled: try ... catch, throws, finally

Strings

• This section covers Strings. formatting and Building Strings.
  • Source code can be found in here.
  • Issues tackled: StringBuilder, StringBuffer, String.format, System.out.printf

Examples Summary

• There are multiple coding examples included in this repository. The main package for examples can be found in here

ID	Definition	Solution
1	Addition for int values	here
2	Division for int values	here
3	String parser for matching parenthesis	here
4	Token generator from Strings	here

Exercises Summary

• There are multiple coding exercises included in this repository. The main package for exercises can be found in here

ID	Definition	Solution
1	Multiplication for int values	here
2	Basic Mathematical operator executor for String input	here
3	Execution of project phases via enum	here
4	Prime Factorization of a number with exceptions	here
5	Finding shared Primes of numbers comma seperated in a String using String libraries	here

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