| Name | Description | Type | Package | Framework |
| Application | Represents the entry point into a WTK application. | Interface | org.apache.pivot.wtk | Apache Pivot |
| Application .AboutHandler | Interface | org.apache.pivot.wtk.Application | Apache Pivot | |
| Application .Adapter | Application adapter. | Class | org.apache.pivot.wtk.Application | Apache Pivot |
| Application .UncaughtExceptionHandler | Optional interface that allows an application to handle uncaught exceptions thrown during a user input event. | Interface | org.apache.pivot.wtk.Application | Apache Pivot |
| Application .UnprocessedKeyHandler | Optional interface that allows an application to handle unprocessed key events (keystrokes that are processed when no component has the | Interface | org.apache.pivot.wtk.Application | Apache Pivot |
| Application .UnprocessedKeyHandler .Adapter | UnprocessedKeyHandler adapter. | Class | org.apache.pivot.wtk.Application.UnprocessedKeyHandler | Apache Pivot |
| ApplicationContext | Base class for application contexts. | Class | org.apache.pivot.wtk | Apache Pivot |
| ApplicationContext .DisplayHost | Native display host. | Class | org.apache.pivot.wtk.ApplicationContext | Apache Pivot |
| ApplicationContext .QueuedCallback | Class | org.apache.pivot.wtk.ApplicationContext | Apache Pivot | |
| ApplicationContext .ResourceCacheDictionary | Resource cache dictionary implementation. | Class | org.apache.pivot.wtk.ApplicationContext | Apache Pivot |
| ApplicationContext .ScheduledCallback | Class | org.apache.pivot.wtk.ApplicationContext | Apache Pivot | |