Getting a number from an index in an Arraylist

I can't figure out how to get a number from an Arraylist that contains more than that number.

For Example:

Code:java

package me.dragona397.hclives;
 
import java.util.ArrayList;
import java.util.logging.Logger;
 
import org.bukkit.ChatColor;
import org.bukkit.command.CommandExecutor;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.plugin.java.JavaPlugin;
 
public class HCLives extends JavaPlugin implements Listener, CommandExecutor {
 
    public Logger log = Logger.getLogger("Minecraft");
 
    public void onEnable() {
 
    }
 
    public void onDisable() {
 
    }
 
    ArrayList<String> lifecredit = new ArrayList<String>();
 
    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent e) {
        if(!e.getPlayer().hasPlayedBefore()) {
            Player p = e.getPlayer();
            lifecredit.add( p + " " + 1);
            p.sendMessage(ChatColor.RED + "Welcome, You have ");
        }
    }
 
}
 

Any help would gladly be accepted.
Also Please notify me if this is actually simple to do.

 

I would create a map of players to credits, and access it that way:

Code:java

Map<Player, Integer> lifecredit = new HashMap<Player, Integer>();
 
@EventHandler
public void onPlayerJoin(PlayerJoinEvent e)
{
Player p = e.getPlayer();
 
if (!p.hasPlayedBefore())
{
lifecredit.set(p, 1);
}
 
p.sendMessage(ChatColor.RED + "Welcome, you have " + life credit.get(p));
}

(I'm assuming you would be somehow storing life credits for people, and accessing it by their player object )

 

DotDash
What are you trying to do exactly?

 

I would recommend using a Map to store a player's UUID and how many credits they have.

 

Musician101 How Would I do that exactly?

 

DotDash The code below is like beeselmane's, however, storing Player in Lists and Maps are somewhat frowned upon. This code also preps your plugin for the inevitable implementation of UUIDs.

Code:java

Map<String, Integer> lifecredit = new HashMap<String, Integer>();
 
@EventHandler
public void onPlayerJoin(PlayerJoinEvent e)
{
    Player p = e.getPlayer();
 
    if (!p.hasPlayedBefore())
    {
        lifecredit.set(p.getUniqueId().toString(), 1);
    }
 
    p.sendMessage(ChatColor.RED + "Welcome, you have " + life credit.get(p.getUniqueId().toString()));
}

 

Musician101 Thanks that helped a lot!

Musician101 Will this be able to store every players credit though?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

yes, you just add a new key(Player's name) with their credits:

Code:java

lifecredit.set(player.getName(), <credit number>);

and get it with:

Code:java

lifecredit.get(player.getName());

 

beeselmane .add gives me an error message:


The method add(String, int) is undefined for the type Map<String,Integer>

 

DotDash oh sorry, I was thinking about array list fixed in the post above

 

beeselmane Sorry for the work, but I have quit the project for other things. Sorry

 

beeselmane Player names won't be constant when 1.8 comes out. That's why I suggested UUIDs

 

Musician101 oh yeah, sorry didn't see that DotDash you should use player.getUniqueId() like he said instead of player.getName() like I did

 

.set doesn't work either

would .put work instead?