[Solved] Which of these is a correct way to inject the property app.title into a String field using @Value? — Ans: @Value("${app.title}") private String title; | Spring Boot

Spring Boot - Spring Annotations

Which of these is a correct way to inject the property app.title into a String field using @Value?

A@Value('${app.title}') private String title;

B@Value(app.title) private String title;

C@Value("app.title") private String title;

D@Value("${app.title}") private String title;

Step-by-Step Solution

Solution:

Step 1: Check correct syntax for property injection
The correct syntax uses ${property.name} inside quotes to reference the property value.
Step 2: Identify correct option
@Value("${app.title}") private String title; uses @Value("${app.title}") which is the correct way. @Value('${app.title}') private String title; uses single quotes inside double quotes which is invalid in Java annotations.
Final Answer:
@Value("${app.title}") private String title; -> Option D
Quick Check:
Property injection syntax = ${property.name} [OK]

Quick Trick: Always use ${property.name} inside double quotes [OK]

Common Mistakes:

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Which of these is a correct way to inject the property app.title into a String field using @Value?