Lambda parameter type can be specified

Last modified: 03 December 2024

Reports lambda parameters that do not have their type specified and suggests adding the missing type declarations.

Example:

Function<String, Integer> length = a -> a.length();

After the quick-fix is applied:

Function<String, Integer> length = (String a) -> a.length();

Locating this inspection

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.

LambdaParameterTypeCanBeSpecified
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Settings or Preferences | Editor | Inspections | Java | Code style issues

This inspection depends on the Java feature 'Lambda expressions', which is available since Java 8.

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,

Can be installed with plugin:

Java, 243.23126