Something

String[] data = command.split(" ");
if(data.length==5)
{
String playerName=data[1];
int x=data[2];
int y=data[3];
int z=data[4];
L2PcInstance player = L2World.getInstance().getPlayer(playerName);
if(player!=null)
{
teleportCharacter(player,x,y,z);
}
}