just few things:

+			int speed = character.getWalkSpeed();
+			character.getWalkSpeed() = speed * 2;

there may be a setWalkSpeed(speed) that you should use ( i didnt seek it)

and *2 /2 can not return you to the original speed

for example:

- enter town (100 speed)

- *2 (200)

- buff with windwalk (240)

- exit town (120)

so you need to recalculate the speed instead of /2

i may be wrong i dont know

until now your main post is breaking a rule:

 

- Do not post simple java strings or stupid Configuring Codes. Such topics will be immediately locked.

 

Well .. but replies look better [not that much different, but better]

 

So .. somebody close this poor code, no ofence this is still a good try :D

Just use subtraction and addition

I added it in my server http://l2sh1t.com :)

we don't really care about your sh1tty server meh

good idea!