java.lang
Interfaces 
Cloneable
Classes 
Class
Math
Object
String
StringBuffer
Thread
Throwable
Exceptions 
ArithmeticException
ArrayIndexOutOfBoundsException
ClassCastException
ClassNotFoundException
Exception
NullPointerException
RuntimeException
Errors 
Error
NoClassDefFoundError
NoSuchMethodError
OutOfMemoryError
StackOverflowError
ThreadDeath