[23:28:12 ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'api' in plugin ConnecticraftAPI v2.0
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-5f38d38-18fbb24]
        at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:141) ~[spigot.jar:git-Spigot-5f38d38-18fbb24]
        at org.bukkit.craftbukkit.v1_8_R3.CraftServer.dispatchCommand(CraftServer.java:641) ~[spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.PlayerConnection.handleCommand(PlayerConnection.java:1162) [spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.PlayerConnection.a(PlayerConnection.java:997) [spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:45) [spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.PacketPlayInChat.a(PacketPlayInChat.java:1) [spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.PlayerConnectionUtils$1.run(SourceFile:13) [spigot.jar:git-Spigot-5f38d38-18fbb24]
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [?:1.7.0_75]
        at java.util.concurrent.FutureTask.run(FutureTask.java:262) [?:1.7.0_75]
        at net.minecraft.server.v1_8_R3.SystemUtils.a(SourceFile:44) [spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.B(MinecraftServer.java:715) [spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.DedicatedServer.B(DedicatedServer.java:374) [spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.A(MinecraftServer.java:654) [spigot.jar:git-Spigot-5f38d38-18fbb24]
        at net.minecraft.server.v1_8_R3.MinecraftServer.run(MinecraftServer.java:557) [spigot.jar:git-Spigot-5f38d38-18fbb24]
        at java.lang.Thread.run(Thread.java:745) [?:1.7.0_75]
Caused by: java.lang.NullPointerException
        at net.connecticraft.api.Coins.ajouter(Coins.java:53) ~[?:?]
        at net.connecticraft.api.Main.onCommand(Main.java:57) ~[?:?]
        at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-5f38d38-18fbb24]
        ... 15 more
>




ligne 53:
 Statement state2 = (Statement) conn.createStatement();















package net.connecticraft.api;

import java.sql.SQLException;
import java.sql.Statement;

import org.bukkit.entity.Player;
import org.sql2o.Sql2o;

import com.mysql.jdbc.Connection;

public class Coins {
    Player player;
    String uuidstring;
    //Statement stmt;

    public static java.sql.Connection conn;

    public static String host;
    public static String username;
    public static String password;
    public static String bdd;

    static Main plugin;

    public Coins(Main instance) {
    plugin = instance;
    }


    public void ajouter(long coins) throws SQLException
    {
      /*   SQL.debutRequete();
         stmt = SQL.stmt();
         String playername = this.uuidstring;
         stmt.executeUpdate("UPDATE player_games SET coins=coins+"+coins+" WHERE uuid='"+playername+"'");
         this.player.sendMessage("1 coin généré");
         SQL.finRequete();*/
     /* Coins.host = plugin.getConfig().getString("host");
        Coins.username = plugin.getConfig().getString("username");
        Coins.password = plugin.getConfig().getString("password");
        Coins.bdd = plugin.getConfig().getString("bdd");
        Sql2o sql2o = new Sql2o("jdbc:mysql://"+Coins.host+":3306/"+Coins.bdd+"?autoReconnect=true", Coins.username, Coins.password);
        String updateSql = "update player_games set coins = :coins where uuid = :uuid";

        try (Connection conn = (Connection) sql2o.open()) {
            ((Sql2o) conn).createQuery(updateSql)
                .addParameter("coins", coins)
                .addParameter("uuid", this.uuidstring)
                .executeUpdate();
        }*/
         try
        {
         Statement state2 = (Statement) conn.createStatement();
            state2.executeUpdate("UPDATE player_games SET coins=coins+"+coins+" WHERE uuid='"+this.uuidstring+"'");
            state2.close();
        }
        catch (SQLException e1)
        {
          e1.printStackTrace();
        }

        Main.test(this.player);
    }

    Coins(Player player)
    {
        this.player = player;
        UUID uuid = new UUID(player);
        this.uuidstring = uuid.recuperer();
    }

}