Should be replaced with 'equals(..., ignoreCase = true)'

Reports case-insensitive comparisons that can be replaced with equals(..., ignoreCase = true).

By using equals() you don't have to allocate extra strings with toLowerCase() or toUpperCase() to compare strings.

The quick-fix replaces the case-insensitive comparison that uses toLowerCase() or toUpperCase() with equals(..., ignoreCase = true).

Note: May change semantics for some locales.

Example:

  fun main() {
      val a = "KoTliN"
      val b = "KOTLIN"
      println(a.toLowerCase() == b.toLowerCase())
  }

After the quick-fix is applied:

  fun main() {
      val a = "KoTliN"
      val b = "KOTLIN"
      println(a.equals(b, ignoreCase = true))
  }

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.

ReplaceWithIgnoreCaseEquals

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 | Kotlin | Redundant constructs

Inspection Details
By default bundled with:	IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,
Can be installed with plugin:	Kotlin, 243.26483-IJ

01 April 2025