java.lang
Interfaces 
Cloneable
Comparable
Runnable
Classes 
Character
Character.Subset
Character.UnicodeBlock
Class
ClassLoader
Math
Object
Package
String
StringBuffer
Thread
ThreadGroup
Throwable
Exceptions 
ArithmeticException
ArrayIndexOutOfBoundsException
ClassCastException
ClassNotFoundException
CloneNotSupportedException
Exception
IllegalAccessException
IllegalArgumentException
IllegalStateException
IndexOutOfBoundsException
InstantiationException
InterruptedException
NullPointerException
NumberFormatException
OutOfMemoryError
RuntimeException
SecurityException
Errors 
ClassFormatError
Error
LinkageError