Reference to empty collection field can be replaced with method call
Reports usages of java.util.Collections
fields: EMPTY_LIST
, EMPTY_MAP
or EMPTY_SET
. These field usages may be replaced with the following method calls: emptyList()
, emptyMap()
, or emptySet()
. Such method calls prevent unchecked warnings by the compiler because the type parameters can be inferred.
Example:
List<Integer> emptyList = Collections.EMPTY_LIST;
After the quick-fix is applied:
List<Integer> emptyList = Collections.emptyList();
This inspection only reports if the language level of the project or module is 5 or higher.
Inspection Details | |
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Available in: | IntelliJ IDEA 2023.3, Qodana for JVM 2023.3 |
Plugin: | Java, 233.SNAPSHOT |
Last modified: 13 July 2023