I have a command class :

 

package com.dcnick.servmod;

import java.util.ArrayList;
import java.util.List;

import net.minecraft.command.ICommand;
import net.minecraft.command.ICommandSender;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.ChatComponentText;

public class AreaCommand implements ICommand {

private List<String> aliases;

protected AreaCommand() {
	aliases = new ArrayList<String>();
	aliases.add("area");
	aliases.add("ar");
}

@Override
public int compareTo(Object arg0) {
	return 0;
}

@Override
public String getCommandName() {
	return "area";
}

@Override
public String getCommandUsage(ICommandSender cs) {
	return "Using: /area [create] [name]";
}

@Override
public List getCommandAliases() {
	return aliases;
}

@Override
public void processCommand(ICommandSender cs, String[] arg) {
	EntityPlayer player;

	if (arg.length < 1) {
		cs.addChatMessage(new ChatComponentText("§4Not Enought Arguments§f"));
		return;
	}

	if (cs instanceof EntityPlayer) {
		player = (EntityPlayer) cs;
	} else {
		cs.addChatMessage(new ChatComponentText("§4Player Only Command§f"));
		return;
	}
	if (arg[0] == "create")
	{
		if (arg.length < 2) {
			cs.addChatMessage(new ChatComponentText(
					"§4Not Enought Arguments§f"));
			return;
		}
		if (player.getEntityData().getBoolean("pos1") && player.getEntityData().getBoolean("pos2"))
		{
			double x1 = player.getEntityData().getInteger("pos1X");
			double y1 = player.getEntityData().getInteger("pos1Y");
			double z1 = player.getEntityData().getInteger("pos1Z");
			double x2 = player.getEntityData().getInteger("pos2X");
			double y2 = player.getEntityData().getInteger("pos2Y");
			double z2 = player.getEntityData().getInteger("pos2Z");
			String name = arg[1];
			cs.addChatMessage(new ChatComponentText(
					"§fCreating Region named '§e" + name
					+ "§f' with Point1 at (§e" + x1 + "§f,§e" + y1
					+ "§f,§e" + z1 + "§f) and Point2 at (§e" + x2
					+ "§f,§e" + y2 + "§f,§e" + z2 + "§f) ..." + "§f"));
		}
		else
		{
			cs.addChatMessage(new ChatComponentText(
					"§4Positions not setted! Use /pos command to do this§f"));
			return;
		}
	}
	else
	{
		cs.addChatMessage(new ChatComponentText(
				"§4Error at argument 1 it can be: create, remove, info§f"));
		return;
	}
}

@Override
public boolean canCommandSenderUseCommand(ICommandSender cs) {
	return true;
}

@Override
public List addTabCompletionOptions(ICommandSender cs, String[] ar) {
	return null;
}

@Override
public boolean isUsernameIndex(String[] p_82358_1_, int p_82358_2_) {
	return false;
}

}

 

 

And when I comparing arg[0] with "create" Program Jumps to else instruction, but I enter "create" in minecraft, Help!!!

That is not how you compare strings.

Ok, english is not my language)

 

I use (arg[0] == "create") that returns false, but it must return true, because arg[0] is "create"

This is pretty basic Java, but to compare arbitrary objects, you have to use the

equals

method.

 

In Java, every object variable is actually a reference. That means object variables only store the memory location of the objects, not the objects themselves. If you use "A == B" with two objects, it compares the addresses of A and B, not A and B themselves. (They are kind of like pointers in C.)

 

Edit:

(I meant

equals

, not

compare

.)

Thanks, I didn't know this.