Inspectopedia 2025.2 Help

Duplicate string literal

Reports string literals that are replicated unchanged throughout the project. Two quick-fixes are provided. One to introduce a constant for a duplicated string and use it throughout the project, and one to show the location of all the duplicates of a particular string literal.

Example:

class C1 { String CONST1 = "duplicate string"; } class C2 { String CONST2 = "duplicate string"; }

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.

DuplicateStringLiteralInspection
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 | Internationalization

Configure the inspection:

  • Use the Min string length field to set the minimal string length required to detect duplicates.

  • Use the Ignore @PropertyKey expressions option to ignore strings passed as arguments to methods annotated with org.jetbrains.annotations.PropertyKey.

Inspection options

Here you can find the description of settings available for the Duplicate string literal inspection, and the reference of their default values.

Min string length

Default value:

5
Ignore @PropertyKey expressions

Default value:

Not 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 DuplicateStringLiteralInspection

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

Inspection Details

By default bundled with:

IntelliJ IDEA 2025.2, Qodana for JVM 2025.2,

Last modified: 18 September 2025