Private method only used from inner class

Reports private methods which are only called from an inner class of the class containing the method. Such methods can be safely moved into that inner class.

Example:

public class Outer {
  public static void main(String[] args) {
    new Inner().run(args[0]);
  }

  static class Inner {
    void run(String arg) {
      // Method isEmpty() is used from Inner class only
      // consider moving it to the Inner class
      if (!isEmpty(arg)) {
        System.out.println("Argument is supplied");
      }
    }
  }

  private static boolean isEmpty(String s) {
    return s != null && s.trim().isEmpty();
  }
}

Use the first checkbox below to ignore private methods which are called from an anonymous or local class.

Use the third checkbox to only report static methods.

Inspection options

Option	Type	Default
Ignore methods called from an anonymous or local class	Checkbox	false
Only report 'static' methods	Checkbox	false

Inspection Details
Available in:	IntelliJ IDEA 2023.3, Qodana for JVM 2023.3
Plugin:	Java, 233.SNAPSHOT

Last modified: 13 July 2023