String template can be used

Reports String concatenations that can be simplified by replacing them with a string template.

Example:

  String name = "Bob";
  String greeting = "Hello, " + name + ". You are " + 29 + " years old.";

After the quick-fix is applied:

  String name = "Bob";
  String greeting = STR."Hello, \{name}. You are 29 years old.";

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.

StringTemplateMigration

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 'String templates', which is available since Java 21-preview.

New in 2023.3

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 StringTemplateMigration

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