Java - How to create Your own /commands

Matim · April 12, 2009

Ok . Everyone know how to create these commands like .command , but now i want to say how to create thats /command . I think it look much better ;)

This guide is for L2J files , if somone want make it for other pack , should change imports .

Ok . As We know...in newest L2J rev , we have handlers in DataPack ( .java files ) so we dont must compile them in core to make them working .

Ok . For example we want to create command and when we use it , it will show us window with our text .

1 . First step :

You should open :

data\scripts\handlers\usercommandhandlers

2. Second Step :

Create new .java file . For example ServerInfo.java

3. Third Step :

- Ok , We have our .java file . So now We must open this file and start writing :

/*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
* 
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
* 
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/

We know , this is GNU license , dont forget to paste it in our file .

- Then We must import some classes needed for shown html window in game , so :

package handlers.usercommandhandlers;

import net.sf.l2j.gameserver.handler.IUserCommandHandler;
import net.sf.l2j.gameserver.model.actor.instance.L2PcInstance;
import net.sf.l2j.gameserver.network.serverpackets.NpcHtmlMessage;

Ok , we have imported needed classes from core , now we must create our class :

public class ServerInfo implements IUserCommandHandler
{
private static final int[] COMMAND_IDS =
{
	121
};

Now all should ask...omg but what is that ? What its this ID ( 121 in this example ) . The answer is simple :

This is ID form our client . We can define this in : commandname-e.dat file . Ok , download FileEdit and open this fille , we should have somethink like that :

- Ok , first column if for command number ( 1,2,3,4,5,5 ... )

- Secound column is for command ID - yes we need it in our class ( I'ill show it again , where we will put ID ) :

private static final int[] COMMAND_IDS =
{

121

};

Ok , we want to add that command : /serverinfo , so we must put :

- 122 in first column , becouse last one was 121 .. ( we are smarts - yeah ;) )

- 121 in secound column , becouse last one was 120 ... ok this is our comman ID , we must this into our class ( look upper , to show where put this ... )

- And in third column we must add :

a,serverinfo\0

Now when we use /serverinfo in game , server will try to use command with 121 ID

So it look like this :

- Close and save file , this is it ;)

Now add to our script this :

/**
*

* @see net.sf.l2j.gameserver.handler.IUserCommandHandler#useUserCommand(int, net.sf.l2j.gameserver.model.actor.instance.L2PcInstance)

*/

public boolean useUserCommand(int id, L2PcInstance activeChar)

{

if (id != COMMAND_IDS[0])

return false;

NpcHtmlMessage npcHtmlMessage = new NpcHtmlMessage(0);

npcHtmlMessage.setHtml("<html><head><title>TvT Event</title></head><body>Your Text Here</body></html>");

activeChar.sendPacket(npcHtmlMessage);

return true;

}

/**

*

* @see net.sf.l2j.gameserver.handler.IUserCommandHandler#getUserCommandList()

*/

public int[] getUserCommandList()

{

return COMMAND_IDS;

}

}

Done , our ServerInfo.java should look that :

/*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
* 
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
* 
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
package handlers.usercommandhandlers;

import net.sf.l2j.gameserver.handler.IUserCommandHandler;
import net.sf.l2j.gameserver.model.actor.instance.L2PcInstance;
import net.sf.l2j.gameserver.network.serverpackets.NpcHtmlMessage;

/**
* Support for /serverinfo command
* Added by Matim
*/
public class ServerInfo implements IUserCommandHandler
{
private static final int[] COMMAND_IDS =
{
	121
};

/**
 * 
 * @see net.sf.l2j.gameserver.handler.IUserCommandHandler#useUserCommand(int, net.sf.l2j.gameserver.model.actor.instance.L2PcInstance)
 */
public boolean useUserCommand(int id, L2PcInstance activeChar)
{
	if (id != COMMAND_IDS[0])
		return false;
                NpcHtmlMessage npcHtmlMessage = new NpcHtmlMessage(0); 
                npcHtmlMessage.setHtml("<html><head><title>TvT Event</title></head><body>Your team won the event. Look in your inventory, there should be your reward.</body></html>"); 
                activeChar.sendPacket(npcHtmlMessage); 
                return true;
        }

/**
 * 
 * @see net.sf.l2j.gameserver.handler.IUserCommandHandler#getUserCommandList()
 */
public int[] getUserCommandList()
{
	return COMMAND_IDS;
}
}

Now we must add our script to MasterHandler.java in \data\scripts\handlers folder

- Open this file : And find these lines , in first column :

import handlers.usercommandhandlers.ChannelDelete;
import handlers.usercommandhandlers.ChannelLeave;
import handlers.usercommandhandlers.ChannelListUpdate;
import handlers.usercommandhandlers.ClanPenalty;
import handlers.usercommandhandlers.ClanWarsList;
import handlers.usercommandhandlers.DisMount;
import handlers.usercommandhandlers.Escape;
import handlers.usercommandhandlers.InstanceZone;
import handlers.usercommandhandlers.Loc;
import handlers.usercommandhandlers.Mount;
import handlers.usercommandhandlers.OlympiadStat;
import handlers.usercommandhandlers.PartyInfo;
import handlers.usercommandhandlers.Time;

and add our :

import handlers.usercommandhandlers.ServerInfo;

Now find this column :

	private static void loadUserHandlers()
{
	UserCommandHandler.getInstance().registerUserCommandHandler(new ClanPenalty());
	UserCommandHandler.getInstance().registerUserCommandHandler(new ClanWarsList());
	UserCommandHandler.getInstance().registerUserCommandHandler(new DisMount());
	UserCommandHandler.getInstance().registerUserCommandHandler(new Escape());
	UserCommandHandler.getInstance().registerUserCommandHandler(new InstanceZone());
	UserCommandHandler.getInstance().registerUserCommandHandler(new Loc());
	UserCommandHandler.getInstance().registerUserCommandHandler(new Mount());
	UserCommandHandler.getInstance().registerUserCommandHandler(new PartyInfo());
	UserCommandHandler.getInstance().registerUserCommandHandler(new Time());
	UserCommandHandler.getInstance().registerUserCommandHandler(new OlympiadStat());
	UserCommandHandler.getInstance().registerUserCommandHandler(new ChannelLeave());
	UserCommandHandler.getInstance().registerUserCommandHandler(new ChannelDelete());
	UserCommandHandler.getInstance().registerUserCommandHandler(new ChannelListUpdate());
	UserCommandHandler.getInstance().registerUserCommandHandler(new ServerInfo());
	_log.config("Loaded " + UserCommandHandler.getInstance().size() + " UserHandlers");
}

And add this :

UserCommandHandler.getInstance().registerUserCommandHandler(new ServerInfo());

(under : UserCommandHandler.getInstance().registerUserCommandHandler(new ChannelListUpdate()); )

Save , and restart Your server , done now type /serverinfo in game ;)

Credits goes to me

rubix123 · April 12, 2009

nice guide men

DBSK · April 12, 2009

nice man cool guide.very helpfull

kwstas13 · April 12, 2009

man this is very helpfull just hide it for lot's of post!!!!

Matim · April 13, 2009

If somone has found any bugg's or somethink like that , please report it to me.

macdonald12 · April 13, 2009

Fully explained, +1 :)

man this is very helpfull just hide it for lot's of post!!!!

lol ::)

Kràtos · April 13, 2009

Very nice guide, for niewbie...

Keep it up!

p.s: This have client modding so... illegal ... .info or .infoserver etc is much better no need client modding ;)

MaestroLuke · April 13, 2009

This have client modding so... illegal ...

you made us laugh so much

it's hard to find good server's without cilent modding

Matim · April 13, 2009

Ok know it is illegal...but somone can use it

Stealth · April 13, 2009

OMG Great share I was looking for a guide like this , cause I only know how to edit commands from Banking.java but couldn't find a way to crate a seperate *.java file.

Thanks again.

Kràtos · April 13, 2009

you made us laugh so much

it's hard to find good server's without cilent modding

Us? how many ppl are you? are like all in one?

1 Waring stay on topic!

As i said is very good guide for starter .... but is client moding so... illegal... If you don't agree go expres your opinion at www.NcSoft.com.

Matim · April 13, 2009

Man ...i fully agree with that what are you talking about , but as i said ..this is for thats people who need and want use it..same like custom items.

kataras2006 · April 21, 2009

yeah.. good tut.. the only bad is 'Client Modding'..... :/

cuz this i like the c0mmands with : .command ... xD

Matim · April 22, 2009

Your chose :D If You like .command chose that :)

Expini · April 23, 2009

why i can't see here

i have login alredy now ?

it say "[Hidden post: You need login to forum to see it.]"

what i do?

Java - How to create Your own /commands

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