[Solved] What will be the output of the following code?String s = "123"; Integer obj = Integer.valueOf(s); int n = obj.intValue(); System.out.println(n + 10); | Java

Java - Wrapper Classes

What will be the output of the following code?

String s = "123";
Integer obj = Integer.valueOf(s);
int n = obj.intValue();
System.out.println(n + 10);

A133

BCompilation error

CNumberFormatException

D12310

Step-by-Step Solution

Solution:

Step 1: Convert String to Integer object
Integer.valueOf("123") creates Integer object with value 123.
Step 2: Extract primitive int and add 10
intValue() returns 123 as int. Adding 10 results in 133.
Final Answer:
133 -> Option A
Quick Check:
123 + 10 = 133 [OK]

Quick Trick: valueOf + intValue() converts string to int for math [OK]

Common Mistakes:

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