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

Class NoArrayTrailingCommaCheck

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

    Checks that array initialization do 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. 

     int[] foo = new int[] {
   1,
   2
 };

    The check demands that there should not be any comma after the last element of an array. 

     String[] foo = new String[] {
   "FOO",
   "BAR", //violation
 }

    To configure the check: 

     <module name="NoArrayTrailingComma"/>

    Which results in the following violations: 

     String[] foo1 = {
   "FOO", // OK
   "BAR", // violation
 };
 String[] foo2 = { "FOO", "BAR", }; // violation
 String[] foo3 = {
   "FOO", // OK
   "BAR" // OK
 };
 String[] foo4 = { "FOO", "BAR" }; // OK

    Parent is com.puppycrawl.tools.checkstyle.TreeWalker

    Violation Message Keys:

    • no.array.trailing.comma
    Since:
    8.28