Java Hashtable - size() Method
The java.util.Hashtable.size() method returns the total number of keys present in the hashtable.
Syntax
public int size()
Parameters
No parameter is required.
Return Value
Returns the total number of keys present in the hashtable.
Exception
NA
Example:
In the example below, the java.util.Hashtable.size() method returns the total number of keys present in the given hashtable.
import java.util.*;
public class MyClass {
public static void main(String[] args) {
//creating a hashtable
Hashtable<Integer, String> Htable = new Hashtable<Integer, String>();
//populating hashtable
Htable.put(101, "John");
Htable.put(102, "Marry");
Htable.put(103, "Kim");
Htable.put(104, "Jo");
System.out.println("Size of Htable: "+ Htable.size());
//adding one more key
Htable.put(105, "Ramesh");
System.out.println("Size of Htable: "+ Htable.size());
}
}
The output of the above code will be:
Size of Htable: 4 Size of Htable: 5
❮ Java.util - Hashtable
