public class HashMapUtils extends Object
| Modifier | Constructor and Description | 
|---|---|
| protected  | HashMapUtils() | 
| Modifier and Type | Method and Description | 
|---|---|
| static int | calcCapacity(int size)Calculates initial capacity needed to hold  sizeelements in
 a HashMap or Hashtable without forcing an expensive increase in internal
 capacity. | 
| static String | mapToString(Map map)spit out each name/value pair | 
| static HashMap | merge(Map map1,
     Map map2)Creates a new  HashMapthat has all of the elements
 ofmap1andmap2(on key collision, the latter
 override the former). | 
public static final int calcCapacity(int size)
size elements in
 a HashMap or Hashtable without forcing an expensive increase in internal
 capacity. Capacity is based on the default load factor of .75.
 
 Usage: Map map = new HashMap(HashMapUtils.calcCapacity(10));
 
size - the number of items that will be put into a HashMappublic static HashMap merge(Map map1, Map map2)
HashMap that has all of the elements
 of map1 and map2 (on key collision, the latter
 override the former).map1 - the fist hashmap to mergemap2 - the second hashmap to mergeCopyright © 2025 The Apache Software Foundation. All rights reserved.