How can you safely convert a String to an Integer object without throwing an exception if the string is not a valid number?

hard📝 Application Q9 of 15

Java - Wrapper Classes

How can you safely convert a String to an Integer object without throwing an exception if the string is not a valid number?

AUse Integer.parseInt(String) directly

BUse Boolean.valueOf(String) and cast to Integer

CUse Integer.valueOf with null check only

DUse try-catch around Integer.valueOf(String)

Step-by-Step Solution

Solution:

Step 1: Understand exception risk in Integer.valueOf
Integer.valueOf throws NumberFormatException if input is invalid.
Step 2: Safe conversion requires handling exceptions
Wrapping Integer.valueOf in try-catch prevents program crash on invalid input.
Final Answer:
Use try-catch around Integer.valueOf(String) -> Option D
Quick Check:
Safe String to Integer needs try-catch [OK]

Quick Trick: Wrap Integer.valueOf in try-catch for safe conversion [OK]

Common Mistakes:

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