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java program to Get Collection Of Values From Hashtable

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import java.util.Enumeration;
import java.util.Iterator;
import java.util.Hashtable;
import java.util.Collection;

class GetCollectionOfValuesFromHashtable {
public static void main(String[] args) {
// creating Hashtable Object
Hashtable ht = new Hashtable();
ht.put("1", "One");
ht.put("2", "Two");
ht.put("3", "Three");
// Initializing collection variables to get the values from the table
Collection c = ht.values();
System.out.println("Values of Collection created from Hashtable are :");
// to get the next values sequentially using iteration
Iterator itr = c.iterator();
while (itr.hasNext())
System.out.println(itr.next());
// to remove the variable from the collection using remove() method
c.remove("One");
System.out
.println("Hashtable values after removal fromCollection are :");
// enumeration is used to call the values of hashtable
Enumeration e = ht.elements();
while (e.hasMoreElements())
System.out.println(e.nextElement());
}
}

output:

D:\CandidJava\Util\HashTable>javac GetCollectionOfValuesFromHashtable.java

Note: GetCollectionOfValuesFromHashtable.java uses unchecked or unsafe operations.

Note: Recompile with -Xlint:unchecked for details.

D:\CandidJava\Util\HashTable>java GetCollectionOfValuesFromHashtable

Values of Collection created from Hashtable are :

Three

Two

One

Hashtable values after removal fromCollection are :

Three

Two

Filed in: Z-A All Java Codes

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