Dynamic regular expression can be replaced by compiled 'Pattern'

Reports calls to the regular expression methods (such as matches() or split()) of java.lang.String using constant arguments.

Such calls may be profitably replaced with a private static final Pattern field so that the regular expression does not have to be compiled each time it is used.

Example:

text.replaceAll("abc", replacement);

After the quick-fix is applied:

  private static final Pattern ABC = Pattern.compile("abc", Pattern.LITERAL);
  ABC.matcher(text).replaceAll(Matcher.quoteReplacement(replacement));

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.

DynamicRegexReplaceableByCompiledPattern

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 | Performance

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 DynamicRegexReplaceableByCompiledPattern

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