Package com.puppycrawl.tools.checkstyle.checks.coding

Class NoEnumTrailingCommaCheck

  • All Implemented Interfaces:
    Configurable, Contextualizable
    public class NoEnumTrailingCommaCheck
extends AbstractCheck

    Checks that enum definition does not contain a trailing comma. Rationale: JLS allows trailing commas in arrays and enumerations, but does not allow them in other locations. To unify the coding style, the use of trailing commas should be prohibited. 

     enum Foo1 {
   FOO,
   BAR;
 }

    The check demands that there should not be any comma after last constant in enum definition. 

     enum Foo1 {
   FOO,
   BAR, //violation
 }

    To configure the check: 

     <module name="NoEnumTrailingComma"/>

    Which results in the following violations: 

     enum Foo1 {
   FOO,
   BAR; //OK
 }
 enum Foo2 {
   FOO,
   BAR //OK
 }
 enum Foo3 {
   FOO,
   BAR, //violation
 }
 enum Foo4 {
   FOO,
   BAR, // violation
   ;
 }
 enum Foo5 {
   FOO,
   BAR,; // violation
 }
 enum Foo6 { FOO, BAR,; } // violation
 enum Foo7 { FOO, BAR, } // violation
 enum Foo8 {
   FOO,
   BAR // OK
   ;
 }
 enum Foo9 { FOO, BAR; } // OK
 enum Foo10 { FOO, BAR } // OK

    Parent is com.puppycrawl.tools.checkstyle.TreeWalker

    Violation Message Keys:

    • no.enum.trailing.comma
    Since:
    8.29