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Chapter 30 The java.util Package |
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Chapter 30 The java.util Package |
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This class implements a hashtable data structure, which allows you to associate values with a key and to efficiently look up the value associated with a given key. A hashtable is essentially an associative array, which stores objects with non-numeric array indices.
put() associates a value with a key in a Hashtable. get() retrieves a value for a specified key. remove() deletes a key/value association. keys() and elements() return Enumeration objects that allow you to iterate through the complete set of keys and values stored in the table.
public class Hashtable extends Dictionary implements Cloneable, Serializable {
// Public Constructors
public Hashtable(int initialCapacity, float loadFactor);
public Hashtable(int initialCapacity);
public Hashtable();
// Public Instance Methods
public synchronized void clear();
public synchronized Object clone(); // Overrides Object
public synchronized boolean contains(Object value);
public synchronized boolean containsKey(Object key);
public synchronized Enumeration elements(); // Defines Dictionary
public synchronized Object get(Object key); // Defines Dictionary
public boolean isEmpty(); // Defines Dictionary
public synchronized Enumeration keys(); // Defines Dictionary
public synchronized Object put(Object key, Object value); // Defines Dictionary
public synchronized Object remove(Object key); // Defines Dictionary
public int size(); // Defines Dictionary
public synchronized String toString(); // Overrides Object
// Protected Instance Methods
protected void rehash();
}
Object->Dictionary->Hashtable(Cloneable, Serializable)
Properties
CropImageFilter.setProperties(), ImageConsumer.setProperties(), ImageFilter.setProperties(), MemoryImageSource(), PixelGrabber.setProperties(), ReplicateScaleFilter.setProperties()
GridBagLayout.comptable
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| java.util.GregorianCalendar (JDK 1.1) |  |
java.util.ListResourceBundle (JDK 1.1) |
