类层次结构
- java.lang.Object 
       
- java.net.http.HttpClient
 - java.net.http.HttpHeaders
 - java.net.http.HttpRequest
 - java.net.http.HttpRequest.BodyPublishers
 - java.net.http.HttpResponse.BodyHandlers
 - java.net.http.HttpResponse.BodySubscribers
 - java.lang.Throwable (implements java.io.Serializable) 
         
- java.lang.异常 
           
- java.io.IOException 
             
- java.net.http.HttpTimeoutException 
               
- java.net.http.HttpConnectTimeoutException
 
 - java.net.http.WebSocketHandshakeException
 
 - java.net.http.HttpTimeoutException 
               
 
 - java.io.IOException 
             
 
 - java.lang.异常 
           
 
 
Interface Hierarchy
- java.util.concurrent.Flow.Publisher<T> 
       
- java.net.http.HttpRequest.BodyPublisher
 
 - java.util.concurrent.Flow.Subscriber<T> 
       
- java.net.http.HttpResponse.BodySubscriber<T>
 
 - java.net.http.HttpClient.Builder
 - java.net.http.HttpRequest.Builder
 - java.net.http.HttpResponse<T>
 - java.net.http.HttpResponse.BodyHandler<T>
 - java.net.http.HttpResponse.PushPromiseHandler<T>
 - java.net.http.HttpResponse.ResponseInfo
 - java.net.http.WebSocket
 - java.net.http.WebSocket.Builder
 - java.net.http.WebSocket.Listener
 
Enum Hierarchy
- java.lang.Object 
       
- java.lang.Enum<E> (implements java.lang.Comparable<T>, java.io.Serializable) 
         
- java.net.http.HttpClient.Redirect
 - java.net.http.HttpClient.Version
 
 
 - java.lang.Enum<E> (implements java.lang.Comparable<T>, java.io.Serializable)