Unhandled exception executing command? Help??

im creating a simple donation plugin for my server it was all working fine but i wanted to make it so you didnt have to go through a long complicated way to get a wand for the signs. Once i added that sub command i started to get this error
Error Code

Code:java

[22:45:23] [Server thread/ERROR]: null
org.bukkit.command.CommandException: Unhandled exception executing command 'donate' in plugin Donator v2.1
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46) ~[spigot.jar:git-Spigot-1322]
    at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:175) ~[spigot.jar:git-Spigot-1322]
    at org.bukkit.craftbukkit.v1_7_R1.CraftServer.dispatchCommand(CraftServer.java:704) ~[spigot.jar:git-Spigot-1322]
    at net.minecraft.server.v1_7_R1.PlayerConnection.handleCommand(PlayerConnection.java:972) [spigot.jar:git-Spigot-1322]
    at net.minecraft.server.v1_7_R1.PlayerConnection.a(PlayerConnection.java:817) [spigot.jar:git-Spigot-1322]
    at net.minecraft.server.v1_7_R1.PacketPlayInChat.a(PacketPlayInChat.java:28) [spigot.jar:git-Spigot-1322]
    at net.minecraft.server.v1_7_R1.PacketPlayInChat.handle(PacketPlayInChat.java:65) [spigot.jar:git-Spigot-1322]
    at net.minecraft.server.v1_7_R1.NetworkManager.a(NetworkManager.java:147) [spigot.jar:git-Spigot-1322]
    at net.minecraft.server.v1_7_R1.ServerConnection.c(ServerConnection.java:77) [spigot.jar:git-Spigot-1322]
    at net.minecraft.server.v1_7_R1.MinecraftServer.u(MinecraftServer.java:700) [spigot.jar:git-Spigot-1322]
    at net.minecraft.server.v1_7_R1.DedicatedServer.u(DedicatedServer.java:273) [spigot.jar:git-Spigot-1322]
    at net.minecraft.server.v1_7_R1.MinecraftServer.t(MinecraftServer.java:562) [spigot.jar:git-Spigot-1322]
    at net.minecraft.server.v1_7_R1.MinecraftServer.run(MinecraftServer.java:469) [spigot.jar:git-Spigot-1322]
    at net.minecraft.server.v1_7_R1.ThreadServerApplication.run(SourceFile:617) [spigot.jar:git-Spigot-1322]
Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
    at com.cheapcoders.donator.Donator.onCommand(Donator.java:435) ~[?:?]
    at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44) ~[spigot.jar:git-Spigot-1322]
    ... 13 more

I tried to fix this myself but everything ive tried has not worked this is my command code
Command Code:

Code:java

@Override
    public boolean onCommand(CommandSender cs, Command cmnd, String string, String[] strings) {
        if (cmnd.getName().equalsIgnoreCase("donate")) {
            if (strings.length == 0) {
                cs.sendMessage("§b[C§cC§2 Donator] §5General Info.");
                cs.sendMessage("§bBase Command for CC Donator");
            }

Im not sure what else i didn't add in correctly Any help will be greatly appreciated, Thank You.

 

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