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Frequent

1 reply on 1 page. Most recent reply: Oct 15, 2003 12:43 AM by Alex S

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Mike

Posts: 1
Nickname: mosherguy
Registered: Oct, 2003

Frequent Posted: Oct 14, 2003 4:15 PM
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I am quite new to java and am trying to write a program to find the most frequent number in an arraylist.
If you could explain the code in detal it would be helpful.
Thanks for any help


Alex S

Posts: 27
Nickname: andu
Registered: Mar, 2003

Re: Frequent Posted: Oct 15, 2003 12:43 AM
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You can use a map object to store frequencies. This map will store mappings from number N to an Integer object (the frequency).


for each number N in arraylist
    get the counter for N from map
    if counter not exist yet, put it in the map [N->0]
    increment counter


In the end, you get a map with all numbers from arraylist and with frequencies for each number.

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