| 9. 48. 11. Using the elements() or the values() method to get the set of all the values in the hash table |
|
|
|
public Enumeration elements()
public Collection values()
|
|
The elements() method returns the set of values as an Enumeration. |
The values() method returns the same data as a Collection. |
This method returns a Collection instead of a Set because the values may contain duplicates. |
|
import java.util.Enumeration;
import java.util.Hashtable;
public class MainClass {
public static void main(String[] s) {
Hashtable table = new Hashtable();
table.put("key1", "value1");
table.put("key2", "value2");
table.put("key3", "value3");
Enumeration e = table.elements();
while (e.hasMoreElements()) {
String key = (String) e.nextElement();
System.out.println(key + " : " + table.get(key));
}
System.out.println(table.values());
}
}
|
|
value3 : null
value2 : null
value1 : null
[value3, value2, value1] |