JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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How to add default value to Spring Boot @Value annotation?


Spring Boot @Value annotation injects property values from application.properties file into spring bean. Here is the syntax to inject property value into spring bean:

@Value("${property_name}")

An example of above syntax is:

@Value("${io.retry.times}")
private int retryCount;
                        

Incase we forget to add this property into application.properties file, spring will throw an exception. To avoid this, @Value annotation allows us to provide default value, the syntax is as shown below:

@Value("${property_name:default_value}")

And the sample code is: In the below case, by default, 5 will be assinged to retryCount variable.

@Value("${io.retry.times:5}")
private int retryCount;
                        

Assign NULL value as a default value


@Value("${property_name:#{null}}")


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What is OOPs?
Object oriented programming organizes a program around its data, i.e. , objects and a set of well defined interfaces to that data. An object-oriented program can be characterized as data controlling access to code.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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