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Thread: pls help me with word occurances program

  1. #1
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    Default pls help me with word occurances program

    i have a program which reads a file and displays the number of occurances of each word in the file and also sorts it occording to number of occurances

    i want to get only top 10 words from the file pls help me with the code

    the program is:
    import java.io.*;
    import java.util.*;
     
    public class HashMapEx {
     
    public static void main(String[] args) {
    LinkedHashMap<String, Integer> wordcount =
    new LinkedHashMap<String, Integer>();
    try {
    BufferedReader in = new BufferedReader(
    new FileReader("c:\\test\\sample.txt"));
    String str;
     
    while ((str = in.readLine()) != null) {
    str = str.toLowerCase(); // convert to lower case
    int idx1 = -1;
     
    for (int i = 0; i < str.length(); i++) {
     
    if ((!Character.isLetter(str.charAt(i))) ||
    (i + 1 == str.length())) {
     
    if (i - idx1 > 1) {
    if (Character.isLetter(str.charAt(i)))
    i++;
    String word = str.substring(idx1 + 1, i);
    if (wordcount.containsKey(word)) {
    wordcount.put(word, wordcount.get(word) + 1);
    } else {
    wordcount.put(word, 1);
    }
    }
    idx1 = i;
    }
    }
    }
    in.close();
    } catch (Exception e) {
    e.printStackTrace();
    System.exit(1);
    }
     
    ArrayList<Integer> values = new ArrayList<Integer>();
    values.addAll(wordcount.values());
     
    Collections.sort(values, Collections.reverseOrder());
     
    int last_i = -1;
     
    for (Integer i : values) {
    if (last_i == i) // without duplicates
    continue;
    last_i = i;
     
    for (String s : wordcount.keySet()) {
    if (wordcount.get(s) == i) // which have this value
    System.out.println(s + ":" + i);
    }
    }
    }
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: pls help me with word occurances program

    I just answered this question on the other forum where you posted it.

    pls help me with word occurances program

  3. #3
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    Default Re: pls help me with word occurances program

    @Norm
    but u did not tell me how to remove top 10 elements. if u can give the code snippet to remove top 10 words ur help would be highly appreciated

  4. #4
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    Default Re: pls help me with word occurances program

    Given a sorted list, look at the list class's API doc for methods you could use to remove items from the list.

  5. #5
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    Default Re: pls help me with word occurances program

    there we have methods to get first,last, moiddle elements and so on none of it allows us to specify a range of elements like element 1 to element 10

  6. #6
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    Default Re: pls help me with word occurances program

    we have methods to get ...
    What class are you using?
    If you can get the first, do it 10 times.

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    Default Re: pls help me with word occurances program

    Please do not post duplicate threads. I have locked your other thread and moved this one to the appropriate location.

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