Class StaticVariableNameCheck

Checks that static, non-final variable names conform to a specified pattern.

• Property format - Specifies valid identifiers. Type is java.util.regex.Pattern. Default value is "^[a-z][a-zA-Z0-9]*$".
• Property applyToPublic - Controls whether to apply the check to public member. Type is boolean. Default value is true.
• Property applyToProtected - Controls whether to apply the check to protected member. Type is boolean. Default value is true.
• Property applyToPackage - Controls whether to apply the check to package-private member. Type is boolean. Default value is true.
• Property applyToPrivate - Controls whether to apply the check to private member. Type is boolean. Default value is true.

To configure the check:

 <module name="StaticVariableName"/>
 

Code Example:

 class MyClass {
   public static int goodStatic = 2; // OK
   private static int BadStatic = 2; // violation, name 'BadStatic'
                                     // must match pattern '^[a-z][a-zA-Z0-9]*$'
 }
 

An example of how to suppress the check to public and protected types is:

 <module name="StaticVariableName">
   <property name="applyToPublic" value="false"/>
   <property name="applyToProtected" value="false"/>
 </module>
 

Code Example:

 class MyClass {
   public static int GoodStatic1 = 2; // OK
   protected static int GoodStatic2 = 2; //OK
   private static int goodStatic = 2 // OK
   private static int BadStatic = 2; // violation, name 'BadStatic'
                                     // must match pattern '^[a-z][a-zA-Z0-9]*$'
 }
 

An example of how to configure the check for names that begin with a lower case letter, followed by letters, digits, and underscores. Also, suppress the check from being applied to private and package-private types:

 <module name="StaticVariableName">
   <property name="format" value="^[a-z](_?[a-zA-Z0-9]+)*$"/>
   <property name="applyToPrivate" value="false"/>
   <property name="applyToPackage" value="false"/>
 </module>
 

Code Example:

 class MyClass {
   public static int good_static = 2; // OK
   public static int Bad_Static = 2; // violation, name 'Bad_Static'
                                     // must match pattern '^[a-z](_?[a-zA-Z0-9]+)*$'
   private static int Good_Static1 = 2; // OK
   static int Good_Static2 = 2; // OK
 }
 

Parent is com.puppycrawl.tools.checkstyle.TreeWalker

Violation Message Keys:

• name.invalidPattern