Java Collection Tutorial - Java WeakHashMap.size()

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Syntax

WeakHashMap.size() has the following syntax.

public int size()

Example

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

/*w  w w  . j a  v  a 2s . c o m*/
import java.util.Map;
import java.util.WeakHashMap;

public class Main {
   public static void main(String[] args) { 
      Map<String, String>  weakHashMap = new WeakHashMap<String, String> ();
            
      
      System.out.println("Putting values into the Map");
      weakHashMap.put("1", "first");
      weakHashMap.put("2", "two");
      weakHashMap.put("3", "from java2s.com");
      
      // checking the size of the Map
      System.out.println("Map size: "+weakHashMap.size());      
   }    
}

The code above generates the following result.

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