Dynamic regular expression could 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

Availability

By default bundled with: IntelliJ IDEA 2024.1, Qodana for JVM 2024.1,
Can be installed with plugin: Java, 241.18072

Last modified: 18 June 2024