Single character string argument in 'String.indexOf()' call

Reports single character strings being used as an argument in String.indexOf() and String.lastIndexOf() calls.

A quick-fix is suggested to replace such string literals with equivalent character literals, gaining some performance enhancement.

Example:

return s.indexOf("x");

After the quick-fix is applied:

return s.indexOf('x');

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.

SingleCharacterStringConcatenation

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

Inspection Details
By default bundled with:	IntelliJ IDEA 2024.2, Qodana for JVM 2024.2,
Can be installed with plugin:	Java, 242.22892

Last modified: 11 September 2024