```
public class JDKTypes
extends Object
```
Defines type constants for classes in the JDK Collections.
These types should be maintained as new JDK versions are released. They have been updated for JDK 8.

Field Summary

Fields
Modifier and Type	Field	Description
`static GenericClassType`	`ABSTRACT_COLLECTION_TYPE`	The `GenericClassType` for `AbstractCollection`
`static GenericClassType`	`ABSTRACT_LIST_TYPE`	The `GenericClassType` for `AbstractList`
`static GenericClassType`	`ABSTRACT_MAP_TYPE`	The `GenericClassType` for `AbstractMap`
`static GenericClassType`	`ABSTRACT_QUEUE_TYPE`	The `GenericClassType` for `AbstractQueue`
`static GenericClassType`	`ABSTRACT_SEQUENTIAL_LIST_TYPE`	The `GenericClassType` for `AbstractSequentialList`
`static GenericClassType`	`ABSTRACT_SET_TYPE`	The `GenericClassType` for `AbstractSet`
`static GenericClassType`	`ARRAY_BLOCKING_QUEUE_TYPE`	The `GenericClassType` for `ArrayBlockingQueue`
`static GenericClassType`	`ARRAY_DEQUE_TYPE`	The `GenericClassType` for `ArrayDeque`
`static GenericClassType`	`ARRAY_LIST_TYPE`	The `GenericClassType` for `ArrayList`
`static GenericClassType`	`BLOCKING_DEQUE_TYPE`	The `GenericClassType` for `BlockingDeque`
`static GenericClassType`	`BLOCKING_QUEUE_TYPE`	The `GenericClassType` for `BlockingQueue`
`static GenericClassType`	`COLLECTION_TYPE`	The `GenericClassType` for `Collection`
`static GenericClassType`	`COMPARATOR_TYPE`	The `GenericClassType` for `Comparator`
`static GenericClassType`	`CONCURRENT_HASH_MAP_TYPE`	The `GenericClassType` for `ConcurrentHashMap`
`static GenericClassType`	`CONCURRENT_LINKED_QUEUE_TYPE`	The `GenericClassType` for `ConcurrentLinkedQueue`
`static GenericClassType`	`CONCURRENT_MAP_TYPE`	The `GenericClassType` for `ConcurrentMap`
`static GenericClassType`	`CONCURRENT_NAVIGABLE_MAP_TYPE`	The `GenericClassType` for `ConcurrentNavigableMap`
`static GenericClassType`	`CONCURRENT_SKIP_LIST_MAP_TYPE`	The `GenericClassType` for `ConcurrentSkipListMap`
`static GenericClassType`	`CONCURRENT_SKIP_LIST_SET_TYPE`	The `GenericClassType` for `ConcurrentSkipListSet`
`static GenericClassType`	`DELAY_QUEUE_TYPE`	The `GenericClassType` for `DelayQueue`
`static GenericClassType`	`DEQUE_TYPE`	The `GenericClassType` for `Deque`
`static GenericClassType`	`ENUM_MAP_TYPE`	The `GenericClassType` for `EnumMap`
`static GenericClassType`	`ENUM_SET_TYPE`	The `GenericClassType` for `EnumSet`
`static GenericClassType`	`HASH_MAP_TYPE`	The `GenericClassType` for `HashMap`
`static GenericClassType`	`HASH_SET_TYPE`	The `GenericClassType` for `HashSet`
`static GenericClassType`	`HASH_TABLE_TYPE`	The `GenericClassType` for `Hashtable`
`static GenericClassType`	`IDENTITY_HASH_MAP_TYPE`	The `GenericClassType` for `IdentityHashMap`
`private static Map<GenericClassType,GenericClassType>`	`implementingTypeMap`	Maps interface and abstract class types to a selected implementing type.
`static GenericClassType`	`LINKED_BLOCKING_DEQUE_TYPE`	The `GenericClassType` for `LinkedBlockingDeque`
`static GenericClassType`	`LINKED_BLOCKING_QUEUE_TYPE`	The `GenericClassType` for `LinkedBlockingQueue`
`static GenericClassType`	`LINKED_HASH_MAP_TYPE`	The `GenericClassType` for `LinkedHashMap`
`static GenericClassType`	`LINKED_HASH_SET_TYPE`	The `GenericClassType` for `LinkedHashSet`
`static GenericClassType`	`LINKED_LIST_TYPE`	The `GenericClassType` for `LinkedList`
`static GenericClassType`	`LINKED_TRANSFER_QUEUE_TYPE`	The `GenericClassType` for `LinkedTransferQueue`
`static GenericClassType`	`LIST_TYPE`	The `GenericClassType` for `List`
`static GenericClassType`	`MAP_TYPE`	The `GenericClassType` for `Map`
`static GenericClassType`	`NAVIGABLE_MAP_TYPE`	The `GenericClassType` for `NavigableMap`
`static GenericClassType`	`NAVIGABLE_SET_TYPE`	The `GenericClassType` for `NavigableSet`
`static GenericClassType`	`PRIORITY_BLOCKING_QUEUE_TYPE`	The `GenericClassType` for `PriorityBlockingQueue`
`static GenericClassType`	`PRIORITY_QUEUE_TYPE`	The `GenericClassType` for `PriorityQueue`
`static GenericClassType`	`QUEUE_TYPE`	The `GenericClassType` for `Queue`
`static GenericClassType`	`SET_TYPE`	The `GenericClassType` for `Set`
`static GenericClassType`	`SORTED_MAP_TYPE`	The `GenericClassType` for `SortedMap`
`static GenericClassType`	`SORTED_SET_TYPE`	The `GenericClassType` for `SortedSet`
`static GenericClassType`	`STACK_TYPE`	The `GenericClassType` for `Stack`
`static GenericClassType`	`SYNCHRONOUS_QUEUE_TYPE`	The `GenericClassType` for `SynchronousQueue`
`static GenericClassType`	`TRANSFER_QUEUE_TYPE`	The `GenericClassType` for `TransferQueue`
`static GenericClassType`	`TREE_MAP_TYPE`	The `GenericClassType` for `TreeMap`
`static GenericClassType`	`TREE_SET_TYPE`	The `GenericClassType` for `TreeSet`
`static GenericClassType`	`VECTOR_TYPE`	The `GenericClassType` for `Vector`
`static GenericClassType`	`WEAK_HASH_MAP_TYPE`	The `GenericClassType` for `WeakHashMap`

Constructor Summary

Constructors
Constructor Description

JDKTypes()

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static GenericClassType`	`getImplementingTypeForCollection(ParameterizedType type)`	Returns an arbitrary (but fixed) concrete collection type for each Collections type (e.g., returns `ArrayList` for `List`).

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

COLLECTION_TYPE

public static final GenericClassType COLLECTION_TYPE

The GenericClassType for Collection

COMPARATOR_TYPE

public static final GenericClassType COMPARATOR_TYPE

The GenericClassType for Comparator

DEQUE_TYPE

public static final GenericClassType DEQUE_TYPE

The GenericClassType for Deque

LIST_TYPE

public static final GenericClassType LIST_TYPE

The GenericClassType for List

SET_TYPE

public static final GenericClassType SET_TYPE

The GenericClassType for Set

SORTED_SET_TYPE

public static final GenericClassType SORTED_SET_TYPE

The GenericClassType for SortedSet

QUEUE_TYPE

public static final GenericClassType QUEUE_TYPE

The GenericClassType for Queue

ARRAY_LIST_TYPE

public static final GenericClassType ARRAY_LIST_TYPE

The GenericClassType for ArrayList

LINKED_LIST_TYPE

public static final GenericClassType LINKED_LIST_TYPE

The GenericClassType for LinkedList

LINKED_HASH_SET_TYPE

public static final GenericClassType LINKED_HASH_SET_TYPE

The GenericClassType for LinkedHashSet

STACK_TYPE

public static final GenericClassType STACK_TYPE

The GenericClassType for Stack

ARRAY_DEQUE_TYPE

public static final GenericClassType ARRAY_DEQUE_TYPE

The GenericClassType for ArrayDeque

TREE_SET_TYPE

public static final GenericClassType TREE_SET_TYPE

The GenericClassType for TreeSet

ENUM_SET_TYPE

public static final GenericClassType ENUM_SET_TYPE

The GenericClassType for EnumSet

HASH_SET_TYPE

public static final GenericClassType HASH_SET_TYPE

The GenericClassType for HashSet

VECTOR_TYPE

public static final GenericClassType VECTOR_TYPE

The GenericClassType for Vector

NAVIGABLE_SET_TYPE

public static final GenericClassType NAVIGABLE_SET_TYPE

The GenericClassType for NavigableSet

BLOCKING_QUEUE_TYPE

public static final GenericClassType BLOCKING_QUEUE_TYPE

The GenericClassType for BlockingQueue

TRANSFER_QUEUE_TYPE

public static final GenericClassType TRANSFER_QUEUE_TYPE

The GenericClassType for TransferQueue

BLOCKING_DEQUE_TYPE

public static final GenericClassType BLOCKING_DEQUE_TYPE

The GenericClassType for BlockingDeque

PRIORITY_QUEUE_TYPE

public static final GenericClassType PRIORITY_QUEUE_TYPE

The GenericClassType for PriorityQueue

CONCURRENT_LINKED_QUEUE_TYPE
```
public static final GenericClassType CONCURRENT_LINKED_QUEUE_TYPE
```
The GenericClassType for ConcurrentLinkedQueue

LINKED_BLOCKING_QUEUE_TYPE

public static final GenericClassType LINKED_BLOCKING_QUEUE_TYPE

The GenericClassType for LinkedBlockingQueue

ARRAY_BLOCKING_QUEUE_TYPE

public static final GenericClassType ARRAY_BLOCKING_QUEUE_TYPE

The GenericClassType for ArrayBlockingQueue

PRIORITY_BLOCKING_QUEUE_TYPE
```
public static final GenericClassType PRIORITY_BLOCKING_QUEUE_TYPE
```
The GenericClassType for PriorityBlockingQueue

DELAY_QUEUE_TYPE

public static final GenericClassType DELAY_QUEUE_TYPE

The GenericClassType for DelayQueue

SYNCHRONOUS_QUEUE_TYPE

public static final GenericClassType SYNCHRONOUS_QUEUE_TYPE

The GenericClassType for SynchronousQueue

LINKED_BLOCKING_DEQUE_TYPE

public static final GenericClassType LINKED_BLOCKING_DEQUE_TYPE

The GenericClassType for LinkedBlockingDeque

LINKED_TRANSFER_QUEUE_TYPE

public static final GenericClassType LINKED_TRANSFER_QUEUE_TYPE

The GenericClassType for LinkedTransferQueue

CONCURRENT_SKIP_LIST_SET_TYPE
```
public static final GenericClassType CONCURRENT_SKIP_LIST_SET_TYPE
```
The GenericClassType for ConcurrentSkipListSet

MAP_TYPE

public static final GenericClassType MAP_TYPE

The GenericClassType for Map

SORTED_MAP_TYPE

public static final GenericClassType SORTED_MAP_TYPE

The GenericClassType for SortedMap

TREE_MAP_TYPE

public static final GenericClassType TREE_MAP_TYPE

The GenericClassType for TreeMap

HASH_MAP_TYPE

public static final GenericClassType HASH_MAP_TYPE

The GenericClassType for HashMap

HASH_TABLE_TYPE

public static final GenericClassType HASH_TABLE_TYPE

The GenericClassType for Hashtable

LINKED_HASH_MAP_TYPE

public static final GenericClassType LINKED_HASH_MAP_TYPE

The GenericClassType for LinkedHashMap

NAVIGABLE_MAP_TYPE

public static final GenericClassType NAVIGABLE_MAP_TYPE

The GenericClassType for NavigableMap

CONCURRENT_MAP_TYPE

public static final GenericClassType CONCURRENT_MAP_TYPE

The GenericClassType for ConcurrentMap

CONCURRENT_NAVIGABLE_MAP_TYPE
```
public static final GenericClassType CONCURRENT_NAVIGABLE_MAP_TYPE
```
The GenericClassType for ConcurrentNavigableMap

CONCURRENT_HASH_MAP_TYPE

public static final GenericClassType CONCURRENT_HASH_MAP_TYPE

The GenericClassType for ConcurrentHashMap

CONCURRENT_SKIP_LIST_MAP_TYPE
```
public static final GenericClassType CONCURRENT_SKIP_LIST_MAP_TYPE
```
The GenericClassType for ConcurrentSkipListMap

IDENTITY_HASH_MAP_TYPE

public static final GenericClassType IDENTITY_HASH_MAP_TYPE

The GenericClassType for IdentityHashMap

WEAK_HASH_MAP_TYPE

public static final GenericClassType WEAK_HASH_MAP_TYPE

The GenericClassType for WeakHashMap

ENUM_MAP_TYPE

public static final GenericClassType ENUM_MAP_TYPE

The GenericClassType for EnumMap

ABSTRACT_COLLECTION_TYPE

public static final GenericClassType ABSTRACT_COLLECTION_TYPE

The GenericClassType for AbstractCollection

ABSTRACT_SET_TYPE

public static final GenericClassType ABSTRACT_SET_TYPE

The GenericClassType for AbstractSet

ABSTRACT_LIST_TYPE

public static final GenericClassType ABSTRACT_LIST_TYPE

The GenericClassType for AbstractList

ABSTRACT_SEQUENTIAL_LIST_TYPE
```
public static final GenericClassType ABSTRACT_SEQUENTIAL_LIST_TYPE
```
The GenericClassType for AbstractSequentialList

ABSTRACT_QUEUE_TYPE

public static final GenericClassType ABSTRACT_QUEUE_TYPE

The GenericClassType for AbstractQueue

ABSTRACT_MAP_TYPE

public static final GenericClassType ABSTRACT_MAP_TYPE

The GenericClassType for AbstractMap

implementingTypeMap
```
private static Map<GenericClassType,GenericClassType> implementingTypeMap
```
Maps interface and abstract class types to a selected implementing type.

Constructor Detail
- JDKTypes
```
public JDKTypes()
```

Method Detail
- getImplementingTypeForCollection
```
public static GenericClassType getImplementingTypeForCollection(ParameterizedType type)
```
  Returns an arbitrary (but fixed) concrete collection type for each Collections type (e.g., returns ArrayList for List). If a type is already concrete, then returns that type.
  
  Parameters:
  
  type - the (abstract) Collections type
  
  Returns:
  
  a concrete Collection type implementing the given type

Class JDKTypes