| CallSite | A CallSiteis a holder for a variableMethodHandle,
 which is called itstarget. | 
      
    
      
        | ConstantCallSite | A ConstantCallSiteis aCallSitewhose target is permanent, and can never be changed. | 
      
    
      
        | MethodHandle | A method handle is a typed, directly executable reference to an underlying method,
 constructor, field, or similar low-level operation, with optional
 transformations of arguments or return values. | 
      
    
      
        | MethodHandles | This class consists exclusively of static methods that operate on or return
 method handles. | 
      
    
      
        | MethodHandles.Lookup | A lookup object is a factory for creating method handles,
 when the creation requires access checking. | 
      
    
      
        | MethodType | A method type represents the arguments and return type accepted and
 returned by a method handle, or the arguments and return type passed
 and expected  by a method handle caller. | 
      
    
      
        | MutableCallSite | A MutableCallSiteis aCallSitewhose target variable
 behaves like an ordinary field. | 
      
    
      
        | VolatileCallSite | A VolatileCallSiteis aCallSitewhose target acts like a volatile variable. |