Value Sort Map Utility (Java Code)

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Value Sort Map Utility (Java Code)

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Author: Niraj Agarwal (View all listings)

Value Sort Map Utility (Java Code)
This class is used to show how you can sort a java.uti.Map for values. This also takes care of null and duplicate values present in the map. Many times we come accross the requirement where we need to sort a Map (HashMap, Hashtable) for it's values. Like User Id's as key and User Name as values; and need to sort it with User Names. This can be good fit for such scenarios.

File name:	Unknown
Product homepage:	Product homepage
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Languages:	Java
Platforms:	general
Release Date:	1 January, 1900
Licence Type:	Unknown
Size:	0 Kb
Price/fee (US$):	Unknown
Number of downloads:	591

User Comments

by anil , on Friday Jun 22, 2007

it is not working when i give numbers as values. its not sorting..but good for the strings
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sortByValue(Map map)
by traveler_82@poczta.onet.pl, on Tuesday Jul 03, 2007

static Map sortByValue(Map map) { List list = new LinkedList(map.entrySet()); Collections.sort(list, new Comparator() { public int compare(Object o1, Object o2) { return ((Comparable) ((Map.Entry) (o1)).getValue()) .compareTo(((Map.Entry) (o2)).getValue()); } }); // logger.info(list); Map result = new LinkedHashMap(); for (Iterator it = list.iterator(); it.hasNext();) { Map.Entry entry = (Map.Entry)it.next(); result.put(entry.getKey(), entry.getValue()); } return result; }
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