return speed;
}
}
public class RemoteControlWithUndo {
Command[] onCommands;
Command[] offCommands;
Command undoCommand;
public RemoteControlWithUndo() {
onCommands = new Command[7];
offCommands = new Command[7];
Command noCommand = new NoCommand();
for (int i = 0; i < 7; i++) {
onCommands[i] = noCommand;
offCommands[i] = noCommand;
}
undoCommand = noCommand;
}
public void setCommand(int slot, Command onCommand, Command offCommand) {
onCommands[slot] = onCommand;
offCommands[slot] = offCommand;
}
public void onButtonWasPressed(int slot) {
onCommands[slot].execute();
undoCommand = onCommands[slot];
}
public void offButtonWasPressed(int slot) {
offCommands[slot].execute();
undoCommand = offCommands[slot];
}
public void undoButtonWasPressed() {
undoCommand.undo();
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append("\n------ Remote Control ------\n");
for (int i = 0; i < onCommands.length; i++) {
sb.append("[slot " + i + "] " + onCommands[i].getClass().getName() + " " + offCommands[i].getClass().getName() + "\n");
}
return sb.toString();
}
}
public class RemoteLoader {
public static void main(String[] args) {
RemoteControlWithUndo remoteControl = new RemoteControlWithUndo();
CeilingFan ceilingFan = new CeilingFan("Living Room");
CeilingFanMediumCommand ceilingFanMedium =
new CeilingFanMediumCommand(ceilingFan);
CeilingFanHighCommand ceilingFanHigh =
new CeilingFanHighCommand(ceilingFan);
CeilingFanOffCommand ceilingFanOff =
new CeilingFanOffCommand(ceilingFan);
remoteControl.setCommand(0, ceilingFanMedium, ceilingFanOff);
remoteControl.setCommand(1, ceilingFanHigh, ceilingFanOff);
remoteControl.onButtonWasPressed(0);
remoteControl.offButtonWasPressed(0);
System.out.println(remoteControl);
remoteControl.undoButtonWasPressed();
remoteControl.onButtonWasPressed(1);
System.out.println(remoteControl);
remoteControl.undoButtonWasPressed();
}
} 作者：FeeLang