asked on java sorting list using data from key/value
Hi,
I'm kinda in struggle here.
So I have a class Word which would just return Strings (but needed it for the equals method to equalsIgnoreCase())
I also have a WordScores class which containc a key/value collections of Words and scores (scores being the score of how much the word is being used)
Now in the WordScores class I have a method: sortByScore(java.util.List
the meaning would be to sort the list words by scores of the key/value collection. Also when the score is the same it should be sorted alphabetically.
Now I'm not sure what collection type to use for the key/value pair...
Also I hoped Collections.sort(words) would work to first sort it alphabetically but doesn't work as it doesn't know its a collection of objects containing only Strings.
I'm kinda in struggle here.
So I have a class Word which would just return Strings (but needed it for the equals method to equalsIgnoreCase())
I also have a WordScores class which containc a key/value collections of Words and scores (scores being the score of how much the word is being used)
Now in the WordScores class I have a method: sortByScore(java.util.List
the meaning would be to sort the list words by scores of the key/value collection. Also when the score is the same it should be sorted alphabetically.
Now I'm not sure what collection type to use for the key/value pair...
Also I hoped Collections.sort(words) would work to first sort it alphabetically but doesn't work as it doesn't know its a collection of objects containing only Strings.
Java
Last Comment
Mutsop
So you can indeed suse TreeMap with word as key and score as value then it will keep them sorted all the time
Alternatively you should make sure the your class Word implemantes Comaprable interface or uyou can use method
Collections.sort(words, Comapartoer) to soerrt them
Alternatively you should make sure the your class Word implemantes Comaprable interface or uyou can use method
Collections.sort(words, Comapartoer) to soerrt them
In fact I think the best choice for you is to use metod
Collections.sort(words, Comparator) and depemdning on which comparaotr you use it will sort either by words or by the score with all the details inside - the way you'll define the method in your Comparator
Collections.sort(words, Comparator) and depemdning on which comparaotr you use it will sort either by words or by the score with all the details inside - the way you'll define the method in your Comparator
look at this linke to see an example how to use Comparoator:
http://www.vogella.de/blog/2009/08/04/collections-sort-java/
http://www.vogella.de/blog/2009/08/04/collections-sort-java/
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ASKER
Wasn't suspecting so many answers from one use :)
thanks
thanks
http://docs.oracle.com/javase/6/docs/api/java/util/TreeMap.html