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Pattern variable can be used

Reports local variable declarations that can be replaced with pattern variables, which are usually more compact.


if (obj instanceof String) { String str = (String) obj; System.out.println(str); }

Can be replaced with:

if (obj instanceof String str) { System.out.println(str); }

Locating this inspection


Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

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 | Java | Java language level migration aids | Java 16

This inspection depends on the Java feature 'Patterns in 'instanceof'' which is available since Java 16.

New in 2020.1


By default bundled with

IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,

Can be installed with plugin

Java, 241.18072

Last modified: 18 June 2024