Java
'Optional' used as field or parameter type
Warning
New
Last modified: 03 December 2024 Reports any cases in which java.util.Optional<T>
, java.util.OptionalDouble
, java.util.OptionalInt
, java.util.OptionalLong
, or com.google.common.base.Optional
are used as types for fields or parameters.
Optional
was designed to provide a limited mechanism for library method return types in which a clear way to represent "no result" was needed.
Using a field with the java.util.Optional
type is also problematic if the class needs to be Serializable
, as java.util.Optional
is not serializable.
Example:
class MyClass {
Optional<String> name; // Optional field
// Optional parameter
void setName(Optional<String> name) {
this.name = name;
}
}
- By ID
Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.
OptionalUsedAsFieldOrParameterType
Inspection Details | |
---|---|
By default bundled with: | |
Can be installed with plugin: | Java, 243.23126 |
Thanks for your feedback!
Was this page helpful?