Java Collection Tutorial - Java WeakHashMap(int initialCapacity) Constructor


WeakHashMap(int initialCapacity) constructor from WeakHashMap has the following syntax.

public WeakHashMap(int initialCapacity)


In the following code shows how to use WeakHashMap.WeakHashMap(int initialCapacity) constructor.

/*www. j  a  va  2 s  .co  m*/
import java.util.Collection;
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> (100);
      System.out.println("Putting values into the Map");
      weakHashMap.put("1", "first");
      weakHashMap.put("2", "two");
      weakHashMap.put("3", "from");
      // checking the size of the Map
      System.out.println("Map values: "+weakHashMap);  
      Collection col = weakHashMap.values();
      System.out.println("Collection values: "+col);  

The code above generates the following result.