Thread: Why does my ClassLoader only work in Debug Mode?

Hey ,
My Problem is that the ClassLoader in my Programm only works when I debug my Programm but i don't know why?
I tried so many Thinks but yeah nothing better.
My Code:

 String userPath = System.getProperty("user.home");
    File clientLocation = new File(userPath + "\\AppData\\Roaming\\.minecraft\\versions\\MCP");
 
    File f2 = new File(clientLocation.getPath() + "\\plugins");
    if (!f2.exists()) {
      f2.mkdir();
    }
    File f1 = new File(clientLocation.getPath() + "\\plugins\\pluginMeta");
    if (!f1.exists()) {
      f1.mkdir();
    }
 
    File[] arrayOfFile;
    int j = (arrayOfFile = new File(clientLocation.getPath() + "\\plugins").listFiles()).length;
    for (int i = 0; i < j; i++)
    {
      File file = arrayOfFile[i];
      if (file.getName().endsWith(".jar"))
      {
        File authorizedJarFile = file;
        ClassLoader authorizedLoader = null;
        try
        {
          authorizedLoader = URLClassLoader.newInstance(new URL[] { authorizedJarFile.toURL() });
        }
        catch (MalformedURLException e)
        {
          e.printStackTrace();
        }
        try
        {
          File pluginYML = new File(clientLocation.getPath() + "\\plugins\\pluginMeta\\" + file.getName().replace(".jar", "") + ".yml");
          if (!pluginYML.exists()) {
            pluginYML.createNewFile();
          }
          JarFile jarFile = new JarFile(authorizedJarFile);
          ZipEntry entry = jarFile.getEntry("plugin.yml");
          InputStream is = jarFile.getInputStream(entry);
 
          Files.copy(
            is, 
            pluginYML.toPath(), new CopyOption[] {
            StandardCopyOption.REPLACE_EXISTING });
 
          IOUtils.closeQuietly(is);
 
          FileConfiguration cfg = new FileConfiguration(pluginYML);
 
          Class c = authorizedLoader.loadClass(cfg.getString("main"));
          Plugin authorizedPlugin = (Plugin)c.newInstance();
          plugins.add(authorizedPlugin);
          authorizedPlugin.setName(cfg.getString("name"));
          authorizedPlugin.setAuthor(cfg.getString("author"));
          authorizedPlugin.setVersion(cfg.getString("version"));
          authorizedPlugin.onEnable();
 
          System.out.println("[" + Date.getDate() + "] Enabling " + authorizedPlugin.getName() + " v" + authorizedPlugin.getVersion() + " by " + authorizedPlugin.getAuthor());
        }
        catch (IOException|InstantiationException|IllegalAccessException e1)
        {
 
        }
      }
    }

So I mean this code works perfectly when I debug my Programm, but when i run it normal, it says 'ClassCastException'.
Please help D: