Help on my minecraft plugin!!

So, im making a minecraft plugin for my server. And im having a bit of trouble, I want it so that when you do the command (map1) it will create a new world/Just copy the map so its the same always through multiverse and then teleport you to it. But ive only made it so it teleports you to coordinates. Any help? :/

package me.simmmatt;

import org.bukkit.ChatColor;







import org.bukkit.Location;







import org.bukkit.Material;







import org.bukkit.command.Command;







import org.bukkit.command.CommandSender;







import org.bukkit.entity.Player;







import org.bukkit.plugin.java.JavaPlugin;

public class Maps extends JavaPlugin {

@Override







public void onEnable() {

}

@Override







public void onDisable() {

}

public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {

if (cmd.getName().equalsIgnoreCase("map1") && sender instanceof Player) {

Player player = (Player) sender;

Location teleportLocation = null;

int x = 0;







int y = 150;







int z = 0;

boolean isOnLand = false;

while (isOnLand == false) {

teleportLocation = new Location(player.getWorld(), x, y, z);

if (teleportLocation.getBlock().getType() != Material.AIR) {







isOnLand = true;







} else y--;

}

player.teleport(new Location(player.getWorld(), teleportLocation.getX(), teleportLocation.getY() + 1, teleportLocation.getZ()));

player.sendMessage(ChatColor.GREEN + "You have been teleported to map 1!");

return true;

} else if







(cmd.getName().equalsIgnoreCase("map2") && sender instanceof Player) {

Player player = (Player) sender;

Location teleportLocation = null;

int x = 100;







int y = 150;







int z = 100;

boolean isOnLand = false;

while (isOnLand == false) {

teleportLocation = new Location(player.getWorld(), x, y, z);

if (teleportLocation.getBlock().getType() != Material.AIR) {







isOnLand = true;







} else y--;

}

player.teleport(new Location(player.getWorld(), teleportLocation.getX(), teleportLocation.getY() + 1, teleportLocation.getZ()));

player.sendMessage(ChatColor.GREEN + "You have been teleported to map 2!");

return true;

} else if







(cmd.getName().equalsIgnoreCase("map3") && sender instanceof Player) {

Player player = (Player) sender;

Location teleportLocation = null;

int x = 300;







int y = 150;







int z = 300;

boolean isOnLand = false;

while (isOnLand == false) {

teleportLocation = new Location(player.getWorld(), x, y, z);

if (teleportLocation.getBlock().getType() != Material.AIR) {







isOnLand = true;







} else y--;

}

player.teleport(new Location(player.getWorld(), teleportLocation.getX(), teleportLocation.getY() + 1, teleportLocation.getZ()));

player.sendMessage(ChatColor.GREEN + "You have been teleported to map 3!");

return true;

}







return false;







}







}