Java Course with Mosh

Course Overview

• Instructor: Mosh
• Aimed at beginners with no barriers for age or experience
• Learn to install Java tools, understand Java code execution, build algorithms
• Tips and shortcuts for professional coding
• Designed to provide a solid foundation for advanced Java features

Instructor's Background

• Mosh: Software engineer with two decades of experience
• Has taught over 3 million people through his coding school at CodeWithMosh.com

Course Sponsor

• Dashlane: Password manager and VPN
• Free for first device, 10% off premium with promo code "mosh"

Java Setup

• Java Development Kit (JDK):
  • Search for "JDK download" and accept license agreement
  • Install for your OS (e.g., Mac, Windows, Linux)
• Code Editor:
  • Recommended: IntelliJ IDEA Community Edition
  • Alternatives: NetBeans, Eclipse

Anatomy of a Java Program

• Functions:
  • Block of code that performs a task
  • Java functions have a return type (e.g., void) and parameters
• Classes:
  • Container for one or more related functions
  • Main class contains the main method (entry point of Java applications)
  • Access modifiers (e.g., public) determine the accessibility of classes and methods
• Naming Conventions:
  • Classes use Pascal case (e.g., Main)
  • Methods use camel case (e.g., sendEmail)

Writing Your First Java Program

• Use IntelliJ IDEA to create a new Java project
• Select Java and JDK version
• Create a command line application
• Define package and class structure
• Write the main method and use System.out.println to print messages

Java Code Execution

• Compilation and Execution:
  • Java code is compiled into bytecode using Java compiler
  • Bytecode is platform-independent
  • Java Virtual Machine (JVM) translates bytecode into native code
• Running Java Programs:
  • Use terminal commands (javac, java) to compile and run programs

Interesting Facts About Java

• Developed by James Gosling in 1995
• Four editions: Standard, Enterprise, Micro, and Java Card
• Used in 3 billion mobile devices
• Average Java developer salary in the US: $100,000

Course Structure

• Four-part series
  • Part 1: Fundamentals, Type System, Control Flow
  • Part 2: Object-Oriented Programming
  • Part 3: Core Java APIs
  • Part 4: Advanced Features
• Build Projects: Mortgage Calculator

Java Programming Fundamentals

• Variables and Constants:

  • Variables store data temporarily
  • Constants are immutable variables

• Types:

  • Primitive Types: byte, short, int, long, float, double, char, boolean
  • Reference Types: Used for complex objects

• Casting and Type Conversion:

  • Implicit and explicit casting
  • Use wrapper classes for type conversion

• Math and String Operations:

  • Use Math class for mathematical operations
  • String manipulation and special characters

• Arrays:

  • Store lists of items
  • Single-dimensional and multi-dimensional arrays

• User Input:

  • Use Scanner class to read input from the user

Control Flow in Java

• Comparison Operators:

  • Equals, Not equals, Greater than, Less than

• Logical Operators:

  • AND (&&), OR (||), NOT (!)

• Conditional Statements:

  • If, Else If, Else
  • Switch statements

• Loops:

  • For loops, While loops, Do-while loops, For-each loops
  • Break and continue statements

Clean Coding Practices

• Importance of readable and maintainable code
• Breaking code into smaller chunks
• Avoiding magic numbers and improving code readability

Conclusion

• Encouragement to explore full Java series for more advanced topics and professional development
• Emphasize the importance of sharing and feedback to support the learning journey