# Hierarchy For Package org.apache.groovy.util.concurrent

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - java.util.AbstractMap<K,V> (implements java.util.Map<K,V>)
    - org.apache.groovy.util.concurrent.ConcurrentReferenceHashMap<K,V> (implements java.io.Serializable)
      - org.apache.groovy.util.concurrent.ManagedIdentityConcurrentMap<K,V>
  - org.apache.groovy.util.concurrent.ConcurrentReferenceHashMap.HashIterator
  - org.apache.groovy.util.concurrent.ConcurrentReferenceHashMap.InitializableEntry<K,V> (implements java.util.Map.Entry<K,V>)
  - org.apache.groovy.util.concurrent.ConcurrentReferenceHashMap.SimpleEntry<K,V> (implements java.util.Map.Entry<K,V>, java.io.Serializable)
    - org.apache.groovy.util.concurrent.ConcurrentReferenceHashMap.WriteThroughEntry
  - org.apache.groovy.util.concurrent.ThreadHelper

## Interface Hierarchy

- org.apache.groovy.util.concurrent.LazyInitializable

## Enum Class Hierarchy

- java.lang.Object
  - java.lang.Enum<E> (implements java.lang.Comparable<T>, java.lang.constant.Constable, java.io.Serializable)
    - org.apache.groovy.util.concurrent.ConcurrentReferenceHashMap.Option
    - org.apache.groovy.util.concurrent.ConcurrentReferenceHashMap.ReferenceType