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Java Fundamentals
7 Units
35 Lessons
Unit 1
Basics
Introduction to Java and Its History
Setting Up Your Java Development Environment
Understanding Java Comments and Code Structure
Real-World Project: Creating a Simple Greeting Application
Basic Java Syntax and Hello World Program
Unit 2
Variables and Data Types
Exploring Primitive Data Types
Working with Reference Data Types and Strings
Type Casting and Conversion Techniques
Declaring and Initializing Variables in Java
Real-World Project: Building a Basic Calculator Tool
Unit 3
Control Flow
Conditional Statements with If-Else
For and While Loops for Repetition
Nested Loops and Conditional Combinations
Switch Statements for Multiple Choices
Real-World Project: Developing a Number Guessing Game
Unit 4
Methods
Defining and Calling Methods
Passing Parameters and Arguments
Return Types and Method Overloading
Scope and Lifetime of Variables in Methods
Real-World Project: Implementing a Utility Method Library
Unit 5
Classes and Objects
Creating and Using Classes
Understanding Objects and Instantiation
Constructors and Their Role
Real-World Project: Designing a Basic Inventory Management System
Access Modifiers for Class Members
Unit 6
Inheritance and Polymorphism
Real-World Project: Building a Shape Hierarchy Application
Understanding Polymorphism and Dynamic Binding
Abstract Classes and Interfaces
Overriding Methods and Super Keyword
Implementing Inheritance in Java
Unit 7
Exception Handling
Creating Custom Exception Classes
Real-World Project: Error-Handling in a File Reader Application
Basics of Exceptions and Error Types
Using Try-Catch and Finally Blocks
Throwing and Propagating Exceptions
Unit 4
•
Chapter 4
Scope and Lifetime of Variables in Methods
Summary
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In Java, what is the scope of a local variable declared inside a non-static method?
Limited to that method only.
Accessible throughout the class.
Available to all instances.
Shared across all threads.
How does the static keyword affect the lifetime of a variable in a method?
Static variables persist program-wide.
They exist only in the method.
Destroyed after method call.
Linked to object lifetime.
For a variable in a static method, what defines its lifetime?
Based on block scope only.
Tied to an object instance.
Until the method ends.
Until the program terminates.
In the Cat class example, what is the scope of a non-static variable used in meow method?
Method-specific only.
Class-wide accessibility.
Available to all cats.
Confined to the object instance.
What happens to the lifetime of variables in static versus non-static methods?
Identical in all cases.
Non-static persist forever.
Both end with method call.
Static variables outlive instances.
5 questions remaining
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Return Types and Method Overloading
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Real-World Project: Implementing a Utility Method Library