Intermediate module
Module 9: Exceptions, Validation, and Debugging
Handle failures deliberately, close resources safely, and debug Java code with stack traces, validation, and useful logs.
Module lessons
Module 9: Exceptions, Validation, and Debugging
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01
Exception Types: Checked, Unchecked, and Errors
Understand which problems should be handled, which signal bugs, and which usually mean the runtime is in trouble.
16 min
Next
02
Try, Catch, and Finally in Real Code
Handle failures clearly, catch the right exceptions, and keep cleanup code predictable.
18 min
Ready
03
Try-with-Resources and AutoCloseable
Use try-with-resources so files, scanners, and streams close automatically.
16 min
Ready
04
Custom Exceptions for Business Rules
Create business-friendly exception types that explain what went wrong without hiding the real cause.
18 min
Ready
05
Reading Stack Traces and Logging Useful Context
Read stack traces faster and add logs that help you reproduce and fix bugs.
18 min
Ready
06
Mini-Project: Safe Input Validator
Build a small validator that parses input, rejects bad values, and reports problems clearly.
26 min
Ready
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