Java - Command Line Arguments
What exception is thrown when Integer.parseInt attempts to parse the string "12a3" in Java?
What exception is thrown when Integer.parseInt attempts to parse the string "12a3" in Java?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the input string
The string "12a3" contains a non-numeric character 'a', which is invalid for integer parsing.Step 2: Identify the exception thrown
Integer.parseIntthrowsNumberFormatExceptionwhen the string cannot be parsed as a valid integer.Final Answer:
NumberFormatException -> Option AQuick Check:
Invalid numeric format triggers NumberFormatException [OK]
Quick Trick: Invalid numeric strings cause NumberFormatException [OK]
Common Mistakes:
- Assuming NullPointerException without null input
- Confusing with IllegalArgumentException
- Expecting ClassCastException for parsing errors
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