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sorting the values using Hsh Map
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Raja Sekhar
Greenhorn
Joined: Oct 10, 2007
Posts: 8
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Hi All,
I need to sort the names and corresponding the values are sorted to it and need to be displayed ,
can anyone suggest the required method.
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satyabrat mishra
Greenhorn
Joined: Oct 24, 2007
Posts: 3
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Map<String, object> set = new TreeMap<String, object>();
put names as key and values as value.
it will automatically sort the names and values.
[ October 29, 2007: Message edited by: satyabrat mishra ]
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certification is not the proof of knowledge.......
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Jesper de Jong
Java Cowboy
Bartender
Joined: Aug 16, 2005
Posts: 12950
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A HashMap is not a sorted collection, so you cannot sort items while they are in a HashMap.
A TreeMap sorts its elements by key.
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Stan James
(instanceof Sidekick)
Ranch Hand
Joined: Jan 29, 2003
Posts: 8791
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If you need to retrieve values by key and iterate them in sequence, you may have to use two collections. You can get the values as a set and make a TreeSet. That will not only sort them, but will also remove duplicates, which may or may not be a good thing.
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A good question is never answered. It is not a bolt to be tightened into place but a seed to be planted and to bear more seed toward the hope of greening the landscape of the idea. John Ciardi
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Jim Yingst
Wanderer
Sheriff
Joined: Jan 30, 2000
Posts: 18670
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To be clear, Jesper is talking about sorting by the key, and Stan is apparently talking about sorting by value. It's not immediately clear which is desired here, although I think sorting by key is more common. If you want to sort values without eliminating duplicates, don't put them in a Set - just use toArray() and then use Arrays.sort().
[ October 29, 2007: Message edited by: Jim Yingst ]
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"I'm not back." - Bill Harding, Twister
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subject: sorting the values using Hsh Map
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