[Solved] Why does this code cause a runtime error?@Value("${app.timeout}") private int timeout;Given app.timeout=abc in properties. | Spring Boot

Spring Boot - Spring Annotations

Why does this code cause a runtime error?

@Value("${app.timeout}")
private int timeout;

Given app.timeout=abc in properties.

AProperty name is invalid

BCannot convert 'abc' to int, causing type mismatch

CMissing default value causes error

DNo error, 'abc' is accepted as int

Step-by-Step Solution

Solution:

Step 1: Analyze property value type
The property 'app.timeout' has value 'abc' which is not a valid integer.
Step 2: Understand type conversion failure
Spring tries to convert 'abc' to int and fails, causing a runtime error.
Final Answer:
Cannot convert 'abc' to int, causing type mismatch -> Option B
Quick Check:
Invalid type conversion causes runtime error [OK]

Quick Trick: Property value must match field type to avoid errors [OK]

Common Mistakes:

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Why does this code cause a runtime error?