Cleanup warnings in java.util.Collections.HEADmaster

2016-03-18  Andrew John Hughes  <gnu_andrew@member.fsf.org>

	Cleanup warnings in java.util.Collections.
	* java/util/Collections.java:
	(EMPTY_SET): Suppress warnings generated by this
	legacy raw type.
	(EMPTY_LIST): Likewise.
	(EMPTY_MAP): Likewise.
	(compare(T, T, Comparator): Suppress warning
	generated by casting to Comparable.
	(binarySearch(List, Comparator)): Remove unneeded
	casts.
	(reverse(List)): Suppress warnings when casting
	to ListIterator<Object>. Cast is necessary as
	lists are modified.
	(reverseOrder(Comparator)): Return reverseOrder()
	rather than rcInstance.
	(reverseOrder()): Create appropriately typed
	ReverseComparator rather than using set instance.
	(rcInstance): Removed.
	(ReverseComparator.compare(T,T)): Suppress warnings
	from casting to Comparable<T>.
	(rotate(List,int)): Suppress warnings when casting
	to List<Object>. Cast is necessary to modify list.
	(shuffle(List,Random)): Likewise.
	(disjoint(Collection,Collection)): Remove unnecessary
	casting.
	(sort(List,Comparator)): Suppress warnings when casting
	the returned array. Arrays of a generic type can not
	be created.
	(swap(List,int,int)): Suppress warnings when casting
	list to List<Object>. This is necessary to use the
	set method.
	(entrySet().SynchronizedMapEntry): Type should not have its
	own type parameters which hide those of the map.
	(entrySet().SynchronizedSet.iterator()): Remove type
	parameters from SynchronizedMapEntry creation.
	(UnmodifiableList.list): Retain input type parameter
	so as to avoid casting.
	(UnmodifiableList.UnmodifiableList): Remove cast.
	(UnmodifiableList.li): Retain input type parameter
	so as to avoid casting.
	(UnmodifiableListIterator(ListIterator)): Likewise.
	(UnmodifiableMap(Map)): Suppress warnings from casting
	down to Map<K,V>.
	(UnmodifiableMap.entrySet()): Remove type parameters
	from UnmodifiableEntrySet creation.
	(UnmodifiableMap.UnmodifiableEntrySet): Remove type
	parameters and make instance-specific so we can
	use the UnmodifiableMap's type parameters.
	(UnmodifiableMap.UnmodifiableEntrySet.UnmodifiableMapEntry):
	Likewise.
	(UnmodifiableMap.UnmodifiableEntrySet.UnmodifiableMapEntry.e):
	Retain input type parameters so as to avoid casting.
	(UnmodifiableMap.UnmodifiableEntrySet.UnmodifiableMapEntry.UnmodifiableMapEntry(Map.Entry)):
	Likewise.
	(UnmodifiableMap.UnmodifiableEntrySet.UnmodifiableEntrySet(Set)):
	Likewise.
	(UnmodifiableMap.UnmodifiableEntrySet.UnmodifiableIterator.next()):
	Remove type parameters from UnmodifiableMapEntry creation.
	(UnmodifiableMap.toArray()): Likewise and improve method
	structure.
	(UnmodifiableMap.toArray(S[])): Remove type parameters from
	UnmodifiableMapEntry and suppress warnings from casting
	array members.
	(UnmodifiableSortedMap.sm): Retain input type parameters
	so as to avoid casting.
	(UnmodifiableSortedMap.UnmodifiableSortedMap(SortedMap)):
	Remove cast.
	(CheckedList.addAll(int,Collection)): Replace iterator with for-each
	loop, removing the need for casting.
	(CheckedMap.entrySet()): Remove type parameters from CheckedEntrySet
	creation and klass argument.
	(CheckedMap.CheckedEntrySet): Don't create additional
	type parameters, use those of the containing map as
	a instance class, not a static class.
	(keyType): Type should be K to match enclosing CheckedMap.
	(valueType): Type should be V to match enclosing CheckedMap.
	(CheckedMap.CheckedEntrySet.CheckedEntrySet(Set,Class,Class)):
	Suppress warnings when casting Map.Entry class.
	(CheckedMap.CheckedEntrySet.iterator()): Make return type
	Map.Entry<K,V> and create corresponding CheckedIterator instance.
	(CheckedMap.CheckedEntrySet.CheckedIterator.next()): Likewise
	with Map.Entry instance.
	(CheckedMap.CheckedEntrySet.CheckedIterator.Map.Entry.getKey()):
	Make return type K.
	(CheckedMap.CheckedEntrySet.CheckedIterator.Map.Entry.getValue()):
	Make return type V.
	(CheckedMap.CheckedEntrySet.CheckedIterator.Map.Entry.setValue(Object)):
	Likewise.
	(CheckedMap.putAll(Map)): Use for-each loop instead of Iterator,
	avoiding casting.

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