Java Programming by Pearson

576 • Java Programming

Explanation: As the class implements the Map interface the set-view of the Hashtable can be obtained

using the entrySet method of the Map interface. Once obtained, then using iterator and MapEntry

interface all the keys and values of the Hashtable can be displayed. One more method using the keySet

method and iterator is given as:

Iterator itr;

System.out.println(“\nKEYS\tVALUES”);

Set S = HT.entrySet();

for (itr = S.iterator(); itr.hasNext(); )

{

Object obj = itr.next();

System.out.println(obj+ “\t”+HT.get(obj));

}

Here using the keySet method a set of keys is obtained, and using Iterator ...