Why i get null pointer?

Code:java

        if (e.getClickedBlock() == null)
            return;
        Block b = e.getClickedBlock();
        if (b.getType().equals(Material.STONE_BUTTON)
                && e.getAction().equals(Action.RIGHT_CLICK_BLOCK)) {
 
            for (String key : Main.getPlugin().getConfig()
                    .getConfigurationSection("Button.Perm").getKeys(false)) {
                String loc = b.getLocation().getWorld().getName() + "|"
                        + b.getLocation().getBlockX() + "|"
                        + b.getLocation().getBlockY() + "|"
                        + b.getLocation().getBlockZ();
                if (key.equalsIgnoreCase(loc)) {
                    if (CommandAdminduty.adminduty.containsKey(e.getPlayer()
                            .getName())) {
                        e.getPlayer().sendMessage(
                                ChatColor.RED + "Ne dutyban vásárolj!");
                        return;
                    }
                    String code = Main.getPlugin().getConfig()
                            .getConfigurationSection("Button.Perm")
                            .getString(loc + ".Jog");
                    double cost = Main.getPlugin().getConfig()
                            .getConfigurationSection("Button.Perm")
                            .getDouble(loc + ".Cost");
                    double money = 0;
                    try {
                        money = Economy.getMoney(e.getPlayer().getName());
                    } catch (UserDoesNotExistException e1) {
                        // TODO Auto-generated catch block
                        e1.printStackTrace();
                    }
                    if (money - cost < 0) {
                        p.sendMessage(ChatColor.RED + "Nincs elég pénzed!");
                        return;
                    }
                    try {
                        Economy.setMoney(e.getPlayer().getName(),
                                (money - cost));
                    } catch (NoLoanPermittedException
                            | UserDoesNotExistException e1) {
                        // TODO Auto-generated catch block
                        e1.printStackTrace();
                    }
                    if (p.hasPermission(code)) {
                        p.sendMessage(ChatColor.RED + "Már van ilyen jogod!");
                        return;
                    }
                    PermissionsEx.getUser(e.getPlayer()).addPermission(code);
                    e.getPlayer().sendMessage(
                            "Sikeresen megvásároltad ezt a jogot!");
                    return;
                }
 
            }

Code:

Button:
  Perm:
    synworld|-149|66|-195:
      Cost: 150000.0
      Jog: essentials.signs.color
    synworld|-149|66|-194:
      Cost: 700000.0
      Jog: essentials.setwarp
    synworld|-149|66|-193:
      Cost: 85000.0
      Jog: essentials.workbench
    synworld|-149|66|-192:
      Cost: 95000.0
      Jog: essentials.enderchest
    synworld|-149|66|-191:
      Cost: 400000.0
      Jog: essentials.tpahere
  Rang:
    synworld|-149|71|-194:
      Cost: 1500000.0
      Rang: kiraly
    synworld|-149|71|-190:
      Cost: 2000000.0
      Rang: surmo
    synworld|-183|71|-190:
      Cost: 2500000.0
      Rang: profi
    synworld|-183|71|-194:
      Cost: 3000000.0
      Rang: milliomos

 

Stacktrace...? and comment the line numbers

 

Any information that helps us help you would be helpful.

 

Code:

[18:58:55] [Server thread/ERROR]: Could not pass event PlayerInteractEvent to SynWorld v1.0
org.bukkit.event.EventException
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:294) ~[craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:501) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:486) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at org.bukkit.craftbukkit.v1_7_R2.event.CraftEventFactory.callPlayerInteractEvent(CraftEventFactory.java:195) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at net.minecraft.server.v1_7_R2.PlayerInteractManager.interact(PlayerInteractManager.java:374) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at net.minecraft.server.v1_7_R2.PlayerConnection.a(PlayerConnection.java:628) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at net.minecraft.server.v1_7_R2.PacketPlayInBlockPlace.a(SourceFile:60) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at net.minecraft.server.v1_7_R2.PacketPlayInBlockPlace.handle(SourceFile:9) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at net.minecraft.server.v1_7_R2.NetworkManager.a(NetworkManager.java:147) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at net.minecraft.server.v1_7_R2.ServerConnection.c(SourceFile:134) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at net.minecraft.server.v1_7_R2.MinecraftServer.v(MinecraftServer.java:657) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at net.minecraft.server.v1_7_R2.DedicatedServer.v(DedicatedServer.java:250) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at net.minecraft.server.v1_7_R2.MinecraftServer.u(MinecraftServer.java:548) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at net.minecraft.server.v1_7_R2.MinecraftServer.run(MinecraftServer.java:459) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    at net.minecraft.server.v1_7_R2.ThreadServerApplication.run(SourceFile:618) [craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
Caused by: java.lang.NullPointerException
    at me.SoHardHUN.Syn.ListenerNeuss.perm(ListenerNeuss.java:210) ~[?:?]
    at sun.reflect.GeneratedMethodAccessor132.invoke(Unknown Source) ~[?:?]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_55]
    at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_55]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:292) ~[craftbukkit_1.7.2_beta.jar:git-Bukkit-1.7.2-R0.3-11-g08fad7a-b3036jnks]
    ... 15 more

Line 210 = 8.

 

sohardhun15

that class?

 

Yes

 

There are a number of things that could be null here.

Main could be null, the result of getPlugin(), the result of getConfig(), the result of getConfigurationSection(), and finally, getKeys()
You have to learn how to debug.

 

Code:java

public static Main plugin;
 
public static Plugin getPlugin() {
        return plugin;
    }
    public void onEnable() {
        plugin = this;
 
}