Defensive Programming
Learn defensive programming: validate inputs, avoid nulls, and fail early with clear exceptions.
Intro
Defensive programming means writing code that anticipates errors: invalid input, nulls, wrong states. It helps catch issues early.
Validate inputs
Check arguments at the start of methods. If input is invalid, throw an exception immediately instead of continuing with bad data.
All lessons in this course
- Throwing & Custom Exceptions
- try-with-resources (AutoCloseable)
- Defensive Programming