Thread: 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);
}
}
}
}

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

http://www.javaprogrammingforums.com...s-program.html

@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

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

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

we have methods to get ...

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