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Underscores in numeric literal

Reports numeric literals with underscores and suggests removing them with a quick-fix. This may be useful if you need to lower the language level.

The quick-fix removes underscores from numeric literals. For example 1_000_000 will be converted to 1000000.

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.

RemoveLiteralUnderscores
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 | Numeric issues

Numeric literals with underscores appeared in Java 7. This inspection can help to downgrade for backward compatibility with earlier Java versions.

New in 2020.2

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 RemoveLiteralUnderscores

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