jade.util.leap

Interface Map

All Known Implementing Classes:

DataStore, HashMap

public interface Map

The LEAP (environment-dependent) version of the &qote;java.util.Map&qote; interface. This interface appears to be exactly the same in J2SE, PJAVA and MIDP. The internal implementation is different in the three cases however.

Version:

1.0, 23/10/00

Author:

Nicolas Lhuillier

See Also:

(J2SE)

Method Summary

Modifier and Type	Method and Description
void	clear() Remove all mappings from this map.
boolean	containsKey(java.lang.Object key) Returns true if this map contains a mapping for the specified key.
java.lang.Object	get(java.lang.Object key) Returns the value to which this map maps the specified key.
boolean	isEmpty() Returns true if this map contains no key-value mappings.
Set	keySet() Returns a set view of the keys contained in this map.
java.lang.Object	put(java.lang.Object key, java.lang.Object value) Associates the specified value with the specified key in this map (optional operation).
java.lang.Object	remove(java.lang.Object key) Removes the mapping for this key from this map if present (optional operation).
int	size() Returns the number of mappings in this map.
Collection	values() Returns a Collection view of the values contained in this map.

Method Detail

isEmpty

boolean isEmpty()

Returns true if this map contains no key-value mappings.

Returns:

true if this map contains no key-value mappings.

See Also:

Map

remove

java.lang.Object remove(java.lang.Object key)

Removes the mapping for this key from this map if present (optional operation).

Parameters:

key - key whose mapping is to be removed from the map.

Returns:

previous value associated with specified key, or null if there was no mapping for key.

See Also:

Map

keySet

Set keySet()

Returns a set view of the keys contained in this map.

Returns:

a set view of the keys contained in this map.

See Also:

Map

values

Collection values()

Returns a Collection view of the values contained in this map.

Returns:

the Collection of elements contained in this map.

See Also:

Map

put

java.lang.Object put(java.lang.Object key,
                     java.lang.Object value)

Associates the specified value with the specified key in this map (optional operation).

Parameters:

key - key with which the specified value is to be associated.

value - value to be associated with the specified key.

Returns:

previous value associated with specified key, or null if there was no mapping for key.

See Also:

Map

containsKey

boolean containsKey(java.lang.Object key)

Returns true if this map contains a mapping for the specified key.

Parameters:

key - key whose presence in this map is to be tested.

Returns:

true if this map contains a mapping for the specified key.

See Also:

Map

get

java.lang.Object get(java.lang.Object key)

Returns the value to which this map maps the specified key. Returns null if the map contains no mapping for this key.

Parameters:

key - key whose associated value is to be returned.

Returns:

the value to which this map maps the specified key, or null if the map contains no mapping for this key.

See Also:

Map

size

int size()

Returns the number of mappings in this map.

See Also:

Map

clear

void clear()

Remove all mappings from this map.

See Also:

Map