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java.lang.ClassNotFoundException: net.minecraft.client.MinecraftApplet
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
        at net.minecraft.GameUpdater.createApplet(GameUpdater.java:355)
        at net.minecraft.Launcher$1.run(Launcher.java:76)