Java Collection Tutorial - Java HashMap.size()


HashMap.size() has the following syntax.

public int size()


In the following code shows how to use HashMap.size() method.

/*ww w  .j ava2 s  .  c  o  m*/

import java.util.HashMap;

public class Main {
   public static void main(String args[]) {
      HashMap<Integer, String> newmap = new HashMap<Integer, String>();      
      // populate hash map
      newmap.put(1, "tutorials");
      newmap.put(2, "from");
      newmap.put(3, "");
      System.out.println("Size of the map: "+ newmap.size());

The code above generates the following result.