myhw3.command

Interface Command

All Known Implementing Classes:

CmdAdd, CmdClear, CmdIn, CmdOut

public interface Command

An UndoableCommand may be run at most once.

Method Summary

Modifier and Type	Method and Description
void	redo() Redo the command.
boolean	run() Do the command.
void	undo() Undo the command.

Method Detail

run

boolean run()

Do the command.

Returns:

true if command succeeds, false otherwise

undo

void undo()

Undo the command.

redo

void redo()

Redo the command.