Application

All Known Subinterfaces:

ApplicationWithProperties

All Known Implementing Classes:

Application.Adapter, ApplicationWithProperties.Adapter, ScriptApplication
```
public interface Application
```
Represents the entry point into a WTK application.
These methods are called by the application context. In general, they should not be invoked directly by the application.

Nested Class Summary

Nested Classes
Modifier and Type	Interface	Description
`static interface`	`Application.AboutHandler`	Optional interface that allows an application to present information about itself.
`static class`	`Application.Adapter`	Deprecated. Since 2.1 and Java 8 the interface itself has default implementations.
`static interface`	`Application.UncaughtExceptionHandler`	Optional interface that allows an application to handle uncaught exceptions thrown during a user input event.
`static interface`	`Application.UnprocessedKeyHandler`	Optional interface that allows an application to handle unprocessed key events (keystrokes that are processed when no component has the input focus).

Method Summary

All Methods Instance Methods Default Methods
Modifier and Type	Method	Description
`default void`	`resume()`	Called when a suspended application has been resumed.
`default boolean`	`shutdown(boolean optional)`	Called when the application is being shut down.
`default void`	`startup(Display display, Map<java.lang.String,java.lang.String> properties)`	Called when the application is starting up.
`default void`	`suspend()`	Called to notify the application that it is being suspended.

- Method Detail
  - startup
```
default void startup(Display display,
                     Map<java.lang.String,java.lang.String> properties)
              throws java.lang.Exception
```
    Called when the application is starting up.
    
    Parameters:
    
    display - The display on which this application was started.
    
    properties - Initialization properties passed to the application.
    
    Throws:
    
    java.lang.Exception - if there is any problem during startup.
  - shutdown
```
default boolean shutdown(boolean optional)
                  throws java.lang.Exception
```
    Called when the application is being shut down.
    
    Parameters:
    
    optional - If true, the shutdown may be cancelled by returning a value of true.
    
    Returns:
    
    true to cancel shutdown, false to proceed with shutdown (default).
    
    Throws:
    
    java.lang.Exception - if there is a problem during shutdown.
  - suspend
```
default void suspend()
              throws java.lang.Exception
```
    Called to notify the application that it is being suspended.
    
    Throws:
    
    java.lang.Exception - if there is a problem doing the suspend.
  - resume
```
default void resume()
             throws java.lang.Exception
```
    Called when a suspended application has been resumed.
    
    Throws:
    
    java.lang.Exception - if there is a problem doing the resume.