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

Package Hierarchies:

- All Packages

## Class Hierarchy

- java.lang.Object
  - java.util.AbstractCollection<E> (implements java.util.Collection<E>)
    - java.util.AbstractQueue<E> (implements java.util.Queue<E>)
      - java.util.concurrent.LinkedBlockingQueue<E> (implements java.util.concurrent.BlockingQueue<E>, java.io.Serializable)
        - org.apache.tomcat.util.threads.TaskQueue
  - java.util.concurrent.AbstractExecutorService (implements java.util.concurrent.ExecutorService)
    - org.apache.tomcat.util.threads.InlineExecutorService
    - org.apache.tomcat.util.threads.ThreadPoolExecutor
    - org.apache.tomcat.util.threads.VirtualThreadExecutor
  - org.apache.tomcat.util.threads.Constants
  - org.apache.tomcat.util.threads.LimitLatch
  - org.apache.tomcat.util.threads.ScheduledThreadPoolExecutor (implements java.util.concurrent.ScheduledExecutorService)
  - org.apache.tomcat.util.threads.TaskThreadFactory (implements java.util.concurrent.ThreadFactory)
  - java.lang.Thread (implements java.lang.Runnable)
    - org.apache.tomcat.util.threads.TaskThread
  - org.apache.tomcat.util.threads.ThreadPoolExecutor.AbortPolicy (implements org.apache.tomcat.util.threads.ThreadPoolExecutor.RejectedExecutionHandler)
  - org.apache.tomcat.util.threads.ThreadPoolExecutor.CallerRunsPolicy (implements org.apache.tomcat.util.threads.ThreadPoolExecutor.RejectedExecutionHandler)
  - org.apache.tomcat.util.threads.ThreadPoolExecutor.DiscardOldestPolicy (implements org.apache.tomcat.util.threads.ThreadPoolExecutor.RejectedExecutionHandler)
  - org.apache.tomcat.util.threads.ThreadPoolExecutor.DiscardPolicy (implements org.apache.tomcat.util.threads.ThreadPoolExecutor.RejectedExecutionHandler)
  - java.lang.Throwable (implements java.io.Serializable)
    - java.lang.Exception
      - java.lang.RuntimeException
        - org.apache.tomcat.util.threads.StopPooledThreadException

## Interface Hierarchy

- java.util.concurrent.Executor
  - org.apache.tomcat.util.threads.ResizableExecutor
- org.apache.tomcat.util.threads.ThreadPoolExecutor.RejectedExecutionHandler