20-01-2010, 11:33 AM | #1 |
Member
Join Date: Dec 2009
Posts: 50
Rep Power: 15 |
How to iterate over Map?
The order of the elements obtained from a Map depends on the type of Map they came from. TreeMap The elements are ordered by key. HashMap The elements will be in an unpredictable, "chaotic", order. LinkedHashMap The elements will be ordered by entry order or last reference order, depending on the type of LinkedHashMap. Example - Iterating over the "entry set" This example utility method prints the key-value pairs in a map. Code:
// utility method dumpMap public static void dumpMap(Map mp) { Iterator it = mp.entrySet().iterator(); while (it.hasNext()) { Map.Entry pairs = (Map.Entry)it.next(); System.out.println(pairs.getKey() + " = " + pairs.getValue()); } } |
Bookmarks |
Tags |
java, map |
|
|