Non-final field in 'enum'

Reports non-final fields in enumeration types. Non-final fields introduce global mutable state, which is generally considered undesirable.

Example:

enum Enum {
  FIRST("first"),
  SECOND("second");

  public String str;

  Enum(String str) {
      this.str = str;
  }
}

After the quick-fix is applied:

enum Enum {
  FIRST("first"),
  SECOND("second");

  public final String str;

  Enum(String str) {
      this.str = str;
  }
}

Use the `Ignore fields that cannot be made 'final'` option to only warn on fields that can be made final using the quick-fix.

Inspection options

Option	Type	Default
Ignore fields that cannot be made 'final'	Checkbox	true

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

Last modified: 13 July 2023