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Explicit type can be replaced with '<>'

Reports new expressions with type arguments that can be replaced a with diamond type <>.


List<String> list = new ArrayList<String>(); // reports array list type argument

After the quick-fix is applied:

List<String> list = new ArrayList<>();

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 7

This inspection depends on the Java feature 'Diamond types' which is available since Java 7.


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