Package gov.nasa.jpl.command

Class UndoCommand

java.lang.Object

gov.nasa.jpl.command.UndoCommand

All Implemented Interfaces:

Command

public class UndoCommand
extends Object
implements Command

Constructor Summary

Constructors

Constructor	Description
UndoCommand()

Method Summary

Modifier and Type	Method	Description
void	execute()	Executes the most recent command stored in the undo stack.
void	unExecute()	Does not do anything.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

UndoCommand

public UndoCommand()

Method Details

execute

public void execute()
             throws CommandException

Executes the most recent command stored in the undo stack. Adds the command to the redo stack.

Specified by:

execute in interface Command

Throws:

CommandException

unExecute

public void unExecute()
               throws CommandException

Does not do anything. This is because undo will never be undone. This is done by using a redo command.

Specified by:

unExecute in interface Command

Throws:

CommandException