1Z0-829 Controlling Program Flow Practice Question
A resource is declared in a try-with-resources statement. The try block throws an exception. The close method throws a different exception. What exception is thrown by the try-with-resources statement?
⚠ Common exam trap
Many exam-takers assume the last exception thrown (from close()) overrides the earlier one, or that both exceptions are thrown simultaneously, but Java's suppressed exception mechanism ensures the try block's exception is primary and close() exceptions are silently attached.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The exception from the try block.
In a try-with-resources statement, if both the try block and the close() method throw exceptions, the exception from the try block is the one thrown by the statement. The exception from close() is suppressed and added to the thrown exception's suppressed exception list (via Throwable.addSuppressed()). This is specified by JLS §14.20.3.2 and ensures the primary failure (the try block exception) is not masked.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The exception from the close method.
Why it's wrong here
The close exception is added to the suppressed list, not thrown.
- ✓
The exception from the try block.
Why this is correct
The try block exception is the primary exception; the close exception is suppressed.
- ✗
A compilation error occurs.
Why it's wrong here
This code is valid.
- ✗
Both exceptions are thrown simultaneously.
Why it's wrong here
Only one exception is thrown; the other is suppressed.
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