Java - Custom Exceptions
Which Java class should a custom checked exception extend?
Which Java class should a custom checked exception extend?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Recall checked vs unchecked exceptions
Checked exceptions must be declared or handled and extend Exception but not RuntimeException.Step 2: Identify correct superclass for checked exceptions
Exception is the base class for checked exceptions; RuntimeException is for unchecked.Final Answer:
Exception -> Option AQuick Check:
Checked exception base class = Exception [OK]
Quick Trick: Checked exceptions extend Exception, unchecked extend RuntimeException [OK]
Common Mistakes:
- Extending RuntimeException for checked exceptions
- Extending Error which is for serious JVM errors
- Extending Throwable directly without reason
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