This is an example of how to get the size of the Hashtable, that is the number of the key- value pairs that the Hashtable contains. Getting the size of the Hashtable implies that you should:
- Create a new Hashtable.
- Populate the hashtable with elements, using
put(K key, V value)API method of Hashtable. - Invoke the
size()API method of the Hashtable. It returns the number of keys of Hashtable.
Let’s take a look at the code snippet that follows:
package com.javacodegeeks.snippets.core;
import java.util.Hashtable;
public class SizeHashtable {
public static void main(String[] args) {
// Create a Hashtable and populate it with elements
Hashtable hashtable = new Hashtable();
hashtable.put("key_1","value_1");
hashtable.put("key_2","value_2");
hashtable.put("key_3","value_3");
// int size() operation returns the number of key value pairs stored in Hashtable
System.out.println("Size of Hashtable : " + hashtable.size());
}
}
Output:
Size of Hashtable : 3
This was an example of how to get the size of the Hashtable in Java.
