How to fix java.lang.ArrayIndexOutOfBoundsException: 1

Can anybody help me why i get the error 'java.lang.ArrayIndexOutOfBoundsException: 1'

PHP:

 public String Input(String bestandsnaam, int rijnummer){
String input = "";
File f = new File("plugins" + File.separator + plugin.Naam + File.separator + bestandsnaam);
StringBuffer contents = new StringBuffer();
BufferedReader reader = null;
try{
reader = new BufferedReader(new FileReader(f));
String text = null;
int Rij = 0;
while ((text = reader.readLine()) != null) {
if(Rij == rijnummer){
contents.append(text).append(System.getProperty("line.separator"));
input = contents.toString();
}
Rij = Rij + 1;
}
reader.close();
if(!f.exists()){
plugin.Console("The Language pack isn't found!");
plugin.Console("The plugin has been disabeld!");
plugin.getPluginLoader().disablePlugin(plugin);
}
String[] In = input.split(": ");
input = In[1].toString();
}
catch(Exception e){plugin.DebugConsole(ChatColor.RED + "Error: " + e);}
return input;
}

The error is while the plugin is onEnable, en the row is the row of Return Input

 

input = ""; input = contents.toString();

If you try and split that, you'll get a String[] with no KVPs. That's why you get an exception.

I would suggest checking that the size of the split string is >= (greater than or equal to) 2. If yes, proceed