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Usages of API which isn't available at the configured language level

Reports usages of the API that is unavailable at the configured language level. This inspection does 3 things:

  • Highlight usage of generified classes when the language level is below Java 7.

  • Highlight when default methods are not overridden and the language level is below Java 8.

  • Highlight usage of API when the language level is lower than marked using the @since tag in the documentation.

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.

Since15
Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

Settings or Preferences | Editor | Inspections | JVM languages

Use the Forbid API usages option to forbid usages of the API in respect to the project or custom language level.

Inspection options

Here you can find the description of settings available for the Usages of API which isn't available at the configured language level inspection, and the reference of their default values.

Forbid usages of API newer than

Default setting: (according to project settings)

Other available settings:

  • 1.3 - Plain old Java

  • 1.4 - 'assert' keyword

  • 5 - 'enum' keyword, generics, autoboxing, etc.

  • 6 - @Override in interfaces

  • 7 - Diamonds, ARM, multi-catch, etc.

  • 8 - Lambdas, type annotations, etc.

  • 9 - Modules, private methods in interfaces, etc.

  • 10 - Local variable type inference

  • 11 - Local variable syntax for lambda parameters

  • 12 - No new language features

  • 13 - No new language features

  • 14 - Switch expressions

  • 15 - Text blocks

  • 16 - Records, patterns, local enums and interfaces

  • 17 - Sealed types, always-strict floating-point semantics

  • 17 (Preview) - Unsupported

  • 18 - JavaDoc snippets

  • 18 (Preview) - Unsupported

  • 19 - No new language features

  • 19 (Preview) - Unsupported

  • 20 - No new language features

  • 20 (Preview) - Unsupported

  • 21 - Record patterns, pattern matching for switch

  • 21 (Preview) - String templates, unnamed classes and instance main methods, etc.

  • 22 - Unnamed variables and patterns

  • 22 (Preview) - Statements before super(), string templates (2nd preview), etc.

  • 23 - Markdown documentation comments

  • 23 (Preview) - Primitive types in patterns, implicitly declared classes, etc.

  • X - Experimental features

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.2, Qodana for JVM 2024.2,

Can be installed with plugin:

Java, 242.22892

Last modified: 11 September 2024