Loop can be replaced with 'List.replaceAll()'

Reports loops which can be collapsed into a single List.replaceAll() call.

Example:

  for (int i = 0; i < strings.size(); i++) {
    String str = strings.get(i).toLowerCase();
    strings.set(i, str);
  }

After the quick-fix is applied:

strings.replaceAll(String::toLowerCase);

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.

Java8ListReplaceAll

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.

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

New in 2022.1

Inspection options

Here you can find the description of settings available for the Loop can be replaced with 'List.replaceAll()' inspection, and the reference of their default values.

Don't warn if the parameter of 'List.replaceAll()' is multiline lambda: Default value:
Selected

Suppressing Inspection

You can suppress this inspection by placing the following comment marker before the code fragment where you no longer want messages from this inspection to appear:

//noinspection Java8ListReplaceAll

More detailed instructions as well as other ways and options that you have can be found in the product documentation:

IntelliJ IDEA 2025.2

Inspection Details
By default bundled with:	IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025