Should I use boolean or Boolean in a Spring Boot RestController?

Question

Make it any difference to use in the following snippet boolean filterMode or Boolean filterMode? Are they any best practice ? Or its completley irrelevant?

@GetMapping
public NOTMATTER getResultByBoolean(
 @RequestParam(value = "filterMode", required = false) boolean filterMode) {

  //.....

}

Answer 1

Yes it will matter. As you have specified the parameter to be optional, if it is not supplied then default values will be different

// Boolean - default value is null
// boolean - default value is false