2001-10-19 Eric Blake <ebb9@email.byu.edu>

	* java/util/IdentityHashMap.java: Improve javadoc, fix member
	visibility for less code generation.
	(modCount): Add fail-safe iteration.
	(entries): Cache the entry set.
	(hash): Rename from getHash, and make it more powerful - common
	code for iterating over the table is now in one location.
	(entrySet): Add missing method hashCode, optimize methods contains
	and remove.
	(equals, putAll): Add missing (but useless) methods.
	(hashCode): Add missing (and important) method.
	(keySet): Add missing method hashCode.
	(values): Add missing method remove.
	(class IdentityIterator): Add fail-safe iteration, fix next to be
	correctly parameterized.
	(class IdentityEntry): Add a class for entrySet iteration.
	* java/util/AbstractMap.java (hashCode): Optimize.
	* java/util/Collections.java (SingletonSet): Fix visibility for
	less code generation.

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