code: /*
  IllegalType
  validateAbstractClassNames = (default)false
  illegalClassNames = (default)HashMap, HashSet, LinkedHashMap, LinkedHashSet, TreeMap, TreeSet, \
                      java.util.HashMap, java.util.HashSet, java.util.LinkedHashMap, \
                      java.util.LinkedHashSet, java.util.TreeMap, java.util.TreeSet
  legalAbstractClassNames = (default)
  ignoredMethodNames = (default)getEnvironment, getInitialContext
  illegalAbstractClassNameFormat = (default)^(.*[.])?Abstract.*$
  memberModifiers =
  tokens = (default)ANNOTATION_FIELD_DEF, CLASS_DEF, INTERFACE_DEF, METHOD_CALL, METHOD_DEF, \
           METHOD_REF, PARAMETER_DEF, VARIABLE_DEF, PATTERN_VARIABLE_DEF, RECORD_DEF, \
           RECORD_COMPONENT_DEF
  
  
  */
  
  package com.puppycrawl.tools.checkstyle.checks.coding.illegaltype;
  import java.util.HashMap;
  import java.util.TreeSet;
  
  public class InputIllegalTypeEmptyStringMemberModifiers implements InputIllegalTypeSuper {
      private AbstractClass a = null; // ok
      private NotAnAbstractClass b = null; /*another comment*/
  
      private com.puppycrawl.tools.checkstyle.checks.coding.illegaltype.InputIllegalType.AbstractClass
          c = null; //WARNING
      private java.util.List d = null;
  
      private abstract class AbstractClass {/*one more comment*/}
  
      private class NotAnAbstractClass {}
  
      private java.util.TreeSet table1() { return null; } // violation
      private TreeSet table2() { return null; } // violation
      static class SomeStaticClass {
  
      }
  
      InputIllegalTypeEmptyStringMemberModifiers(Integer i) {}
      private void table2(Integer i) {}
  
      private void getInitialContext(java.util.TreeSet v) {} // ok
  
      @Override
      public void foo(HashMap<?, ?> buffer) {} // ignore
  
      @Override
      public HashMap<?, ?> foo() { //ignore
          return null;
      }
  
      @Override
      public HashMap<?, ?> bar() { //ignore
          return null;
      }
  }
  
  interface InputIllegalTypeSuperEmptyStringMemberModifiers {
      void foo(HashMap<?, ?> buffer); // violation
  
      HashMap<?, ?> foo(); // violation
  
      Object bar();
  }
  