The Complete Java Course: From Basics to Advanced

Use Eclipse to create a new Java project, add a main class, and write code to print Hello World, then run the program to view output in the console.

Learn how Java's standard output, accessed via System.out, uses print line to add a new line and print to stay on the same line for console output.

Explore Java type casting, including automatic and manual conversions, widening and narrowing between data types, with examples of up casting and down casting.

Java stores characters as Unicode numbers mapped to symbols, with examples like 65 for 'A' and 97 for 'a', and shows how casting reveals decimal values and next characters.

Explain comments in Java, including single-line comments starting with // and multi-line comments using /* ... */, with hello world and the main function as the entry point.

Learn how Java comparison operators produce booleans by comparing two values, using greater than, less than, greater than or equal to, less than or equal to, equals, and not equals.

Explore how Java's increment and decrement operators work, including postfix and prefix forms, the x += 1 shorthand, and examples that print updated values.

Explore how wrapper classes wrap primitive data types into objects, enabling autoboxing and unboxing in Java, with examples using int and character and the toString conversion.

Discover how Java packages group related code, control access, and support reuse, then import packages or specific classes like ArrayList to use their functionality.

Create a simple Java program in Eclipse to demonstrate declaring and assigning integers, using print and println, and applying compound assignment and division to update values.

Explore the switch statement in Java, which tests a variable against multiple values and executes a matching case using break, with a default for unmatched cases.

Learn how parameters pass information to functions with integer parameters, see a multiply example with 2 and 3, and a power2 function that squares a value.

Learn function overloading in Java by using the same method name with different parameter lists, and see overload resolution based on number, type, and order of parameters.

Learn how to return int arrays from methods in Java by creating a method that returns an array and using it in main to iterate and print elements.

Learn how to compare strings in Java using the equals method, the equals two operator, and the compare two method; understand text value versus references, case sensitivity, and lexicographic results.

Learn Java string concatenation with the plus operator and the concat method to form new strings from literals and numbers, returning a new string object.

Discover how to use Java's string repeat method to repeat a string n times, building repeated dashes and hello lines, and trim the trailing newline with substring.

Explore stringbuilder and stringbuffer in Java, showing append, insert, delete, and toString operations on a Hello world example; compare thread safety and when to use stringbuffer versus stringbuilder.

Explore character classes in RegEx, defining a set of characters that match a single character in a string. See negation, ranges, and intersections with practical examples.

Define object oriented programming as a paradigm that organizes code into objects via classes and instances, with attributes and methods, and illustrates inheritance, encapsulation, and polymorphism for reusable, modular code.

Explore abstract classes in Java, learn why you cannot instantiate an abstract class, and see how subclasses implement abstract methods like draw while optionally overriding non-abstract methods.

Master the super keyword to reference the immediate parent class instance variable, invoke the immediate parent class method, and call the immediate parent constructor in subclass constructors.

Override the toString method in Java classes to produce a readable object representation. Learn how to print objects directly with println and display key fields.