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Interfaces must have java.lang.Object as superclass
java.lang.ClassFormatError: Interfaces must have java.lang.Object as superclass at java.lang.ClassLoader.defineClass0(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:502) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123) at java.net.URLClassLoader.defineClass(URLClassLoader.java:250) at java.net.URLClassLoader.access$100(URLClassLoader.java:54) at java.net.URLClassLoader$1.run(URLClassLoader.java:193) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:186) at Tester$MyCL.loadClass(Tester.java:43) at java.lang.ClassLoader.loadClass(ClassLoader.java:255) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315) at java.lang.ClassLoader.defineClass0(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:502) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123) at java.net.URLClassLoader.defineClass(URLClassLoader.java:250) at java.net.URLClassLoader.access$100(URLClassLoader.java:54) at java.net.URLClassLoader$1.run(URLClassLoader.java:193) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:186) at Tester$MyCL.loadClass(Tester.java:43) at java.lang.ClassLoader.loadClass(ClassLoader.java:255) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315) at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:1627) at java.lang.Class.getMethod0(Class.java:1746) at java.lang.Class.getDeclaredMethod(Class.java:1233) at Tester$1.run(Tester.java:20) at java.lang.Thread.run(Thread.java:536)