10 Module 10 — Chapter 12

⚠ Exception Handling in Java

Write robust programs that handle errors gracefully
“A good program doesn’t crash — it fails gracefully, tells you what went wrong, and gives you a chance to recover.”
Types of Errors try-catch-finally throw & throws Exception Hierarchy Custom Exceptions Propagation
Learning Path
8 Lessons
1
Tutorial
Three Types of Errors
Review syntax, logical, and runtime errors with real-world analogies
Review Errors Analogies
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2
Tutorial
Why Exception Handling?
Oracle's three advantages and the two core goals of exception handling
Advantages Oracle Design
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3
Tutorial
The Division Problem
Step-by-step from crash to exception: if-fix, modular design, and the throw/catch solution
throw catch Step-by-Step
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4
Tutorial
Exception Class Hierarchy
Throwable tree, Error vs Exception, checked vs unchecked
Hierarchy Checked Unchecked
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5
Tutorial
Exception Propagation
How exceptions travel up the call stack — the Municipality Analogy and why callers should decide
Call Stack Propagation Analogy
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6
Tutorial
Handling Exceptions in Code
try/catch/finally/try-with-resources, throw vs throws
try-catch finally throws
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7
Tutorial
Creating Your Own Exceptions
Zakah example, checked vs unchecked, which to extend, and when NOT to use exceptions
Custom Checked vs Unchecked Efficiency
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8
Exercises
Practice & Challenges
Challenge exercises and practice problems to test your understanding
Exercises Practice
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Key Concepts

🛑
Graceful Termination
Stop the program safely with cleanup and rollback — save data, close files, inform the user
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Continued Execution
Handle errors and keep the program running — critical for stock markets, medical devices, banking
🗒
Exception Hierarchy
Organized class tree: Throwable, Error, Exception, RuntimeException — checked vs unchecked
🔧
Custom Exceptions
Create domain-specific exceptions for precise error handling — InvalidZakahAmountException
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