![]() ![]() Since the value of 8 is not available, null will be returned in the second getOrDefault() method. Then, the values for keys 3 and 8 will be retrieved using the method getOrDefault(). In this program also, values of 1, 2, 3, 4, 5, 6 and 7 will be displayed on executing the code. if value of 8 is present, then return it else print Null if value of 3 is present, then return it else print Null Moreover, the new balance of A will also be displayed, as shown below.Ĭode: //Java program to get keys and values from the hashtable Values of A, B, C, D, and E will be displayed on executing the code. (" A's new balance : " + htbl.get(" A ")) Htbl.put(" A ", new Double(balance + 1000)) if more elements are present in the enm, enter this loop Store all the keys in the enumeration enm Java program to add keys and values to the hashtable.Ĭode: //Java program to add keys and values to the hashtable values (): A collection view will be returned for the values present in the map.Įach data structure has its own special features.īelow are the examples of implementing hashtable in java.remove ( Object k): Key k and the corresponding value will be removed from the table.putAll ( Map t): The mappings will be copied from the mentioned map to the hashtable.put ( K key, V al value): Key k will be mapped to the value val in the hashtable.hashCode (): Hash code value will be returned for the map.size (): The count of keys in the hashtable will be returned. ![]() keySet (): A set view will be returned for the keys present in the map.isEmpty (): This method checks whether the hashtable is not mapping keys to any values.If nothing is mapped, null will be returned. get ( Object key): If the specified key is mapped into any value, it will be returned.equals ( Object o): A map will be compared with the specified object.entrySet (): A set view will be returned for the mappings present on the map. ![]()
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