NullPointerException*
Usted trató de acceder a un objeto (tanto un campo
en un objeto o un mensaje de un objeto). Esto
no funcionará debido a que la referencia al objeto que
usted utilizó para acceder al objeto fue 'null'. Por
ejemplo: Usted escribió "thing.print()", y "thing"
era null en este momento.

ArithmeticException*
Algo fue mal durante un cálculo
aritmético, tal como una división por 0 o
algo similar.

StringIndexOutOfBoundsException*
You have tried to access a character or a substring
in a string , and the index you used does not exist
in that string. For example, you may have tried to
access the fifth character in a string that is only
three characters long.
For the substring operation, remember that the second
parameter is the length of the substring, not the
end index.

ClassCastException*
You used a "cast" - that is an instruction assigning
a different static type to an object, such as in this
example:
       (String)someObject
Here, "someObject" is cast to "String". This is legal
only if the object stored in someObject really is of
type String.
In other words: you can cast to type T only if the
object you are casting is of type T or one of its
subtypes. In your case it wasn't.

IndexOutOfBoundsException*
An index of some sort (such as to an array, to a string,
or to a vector) is out of range. "Out of range" means
that the index does not exist in the array or other
collection (e.g. you tried to access element 5, but only
three elements exist).

ArrayIndexOutOfBoundsException*
An array index is out of range. "Out of range" means
that the index does not exist in the array (e.g. you
tried to access element 5, but only three elements
exist). The legal index range is 0..arraylength-1.

ConcurrentModificationException*
You are doing an iteration over a collection here.
While you are doing this, the collection was modified.
That's a problem. You are not allowed to modify the
collection during an iteration. Or the other way
around: you cannot continue the iteration after
modifying the collection. The only modification
allowed during an iteration is removing elements with
the Iterator's remove method (NOT the remove in the
collection itself).

ArrayStoreException*
No help available - sorry.

CannotRedoException*
No help available - sorry.

CannotUndoException*
No help available - sorry.

CMMException*
No help available - sorry.

EmptyStackException*
No help available - sorry.

IllegalArgumentException*
No help available - sorry.

IllegalMonitorStateException*
No help available - sorry.

IllegalPathStateException*
No help available - sorry.

IllegalStateException*
No help available - sorry.

ImagingOpException*
No help available - sorry.

MissingResourceException*
No help available - sorry.

NegativeArraySizeException*
No help available - sorry.

NoSuchElementException*
No help available - sorry.

ProfileDataException*
No help available - sorry.

ProviderException*
No help available - sorry.

RasterFormatException*
No help available - sorry.

SecurityException*
No help available - sorry.

SystemException*
No help available - sorry.

UndeclaredThrowableException*
No help available - sorry.

UnsupportedOperationException*
No help available - sorry.

Exception
Esta es una excepción general que sólo dice
que algo va mal. No tengo idea
de qué se trata...