Summary of "Java Full Course for free ☕ (2025)"

1. Introduction to Java

Setup requirements:
- Install JDK (Java Development Kit) from Oracle.
- Install an IDE (IntelliJ IDEA Community Edition recommended).
Create a new Java project and main class.
Write and run your first Java program with a main method.
Use System.out.print and System.out.println for console output.
Use comments (// for single line, /* */ for multi-line).
IntelliJ shortcuts (e.g., sout + Tab for print statement).

Variables are containers for values.
Primitive data types:
- int (whole numbers)
- double (decimal numbers)
- char (single characters, enclosed in single quotes)
- boolean (true or false)
Reference data types:
- String (sequence of characters, enclosed in double quotes)
Declaration and assignment explained.
Naming conventions: camelCase.
String concatenation with +.
Boolean usage and simple if-statement example.

Import java.util.Scanner.
Create a Scanner object to read input from the console.
Methods:
- nextLine() for strings with spaces.
- next() for strings without spaces.
- nextInt() for integers.
- nextDouble() for doubles.
- nextBoolean() for booleans.
Handle input buffer issues (clearing new line after numeric input).
Exercises:
- Calculate area of rectangle with user input.
- Mad Libs game using multiple user inputs.

Constants: Math.PI, Math.E.
Methods:
- Math.pow(), Math.abs(), Math.sqrt()
- Math.round(), Math.ceil(), Math.floor()
- Math.max(), Math.min()
Exercises:
- Calculate hypotenuse of a right triangle.
- Calculate circumference, area, and volume of circle/sphere.
Introduction to printf formatting for output precision.

Compound Interest Calculator: user inputs principal, rate, times compounded, years; calculates final amount.
Shopping Cart: user inputs item, price, quantity; calculates total.
Mad Libs Game: user inputs adjectives, nouns, verbs to fill in a silly story.
Dice Rolling Simulator: user inputs number of dice; outputs dice rolls with ASCII art.
Number Guessing Game: Random number generated; user guesses until correct; counts attempts.
Rock Paper Scissors Game: user vs computer with input validation and replay option.
Slot Machine Game: user bets, Random emojis generated, payout calculated.
Banking Program: deposit, withdraw, show balance with input validation.
Temperature and Weight Conversion Programs using ternary operators.
Calculator Program using enhanced switch statements.
Hangman Game: user guesses letters, ASCII hangman displayed.