An Entry with the key and item of this entry if this entry's item is non-null, or null otherwise.

The hash value of the value, which allows the value to be an element of a hash-based set or key of a hash-based map. Implementations must respect the constraint that:

• if x==y then x.hash==y.hash.

Therefore, a class which refines Object.equals() must also refine hash.

In general, hash values vary between platforms and between executions of the same program.

Note that when executing on a Java Virtual Machine, the 64-bit Integer value returned by an implementation of hash is truncated to a 32-bit integer value by removal of the 32 highest order bits, before returning the value to the caller.

The item associated with the key.

The key used to access the entry.

A pair (2 element tuple) with the key and item of this entry. For any entry:

entry.pair == [entry.key,entry.item]

A description of the entry in the form key->item. If item is null, its string representation is the string "<null>".

Determines if this entry is equal to the given entry. Two entries are equal if they have the same key and the same item.

• The keys are considered the same if they are equal, in the sense of value equality.
• Two items are considered the same if they are both null or if neither is null and they are equal.