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This exception has no message.
java.lang.NullPointerException at sun.misc.URLClassPath$3.run(URLClassPath.java:313) at java.security.AccessController.doPrivileged(Native Method) at sun.misc.URLClassPath.getLoader(URLClassPath.java:310) at sun.misc.URLClassPath.getLoader(URLClassPath.java:287) at sun.misc.URLClassPath.getResource(URLClassPath.java:157) at java.net.URLClassLoader$1.run(URLClassLoader.java:192) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:188) at java.lang.ClassLoader.loadClass(ClassLoader.java:306) at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:580) at java.lang.ClassLoader.loadClass(ClassLoader.java:251) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:242) at StandAlone.Runner.main(Runner.java:16)