# Hierarchy For Package org.apache.tomcat.util.collections

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - java.util.AbstractMap<K,V> (implements java.util.Map<K,V>)
    - org.apache.tomcat.util.collections.CaseInsensitiveKeyMap<V>
    - org.apache.tomcat.util.collections.ManagedConcurrentWeakHashMap<K,V> (implements java.util.concurrent.ConcurrentMap<K,V>)
  - org.apache.tomcat.util.collections.ConcurrentCache<K,V>
  - org.apache.tomcat.util.collections.SynchronizedQueue<T>
  - org.apache.tomcat.util.collections.SynchronizedStack<T>