# Hierarchy For Package org.optaplanner.core.impl.domain.common

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - java.util.AbstractMap<K,​V> (implements java.util.Map<K,​V>)
    - java.util.concurrent.ConcurrentHashMap<K,​V> (implements java.util.concurrent.ConcurrentMap<K,​V>, java.io.Serializable)
      - org.optaplanner.core.impl.domain.common.ConcurrentMemoization<K,​V>
  - org.optaplanner.core.impl.domain.common.AlphabeticMemberComparator (implements java.util.Comparator<T>)
  - org.optaplanner.core.impl.domain.common.ReflectionHelper