java - How to count unique words in a text file? -


i have implemented code count number of: - chars - words - lines - bytes in text file. how count dictionary size: number of different words used in file? also, how implement iterator can iterate on letters? (ignore whitespaces)

public class wc {     public static void main(string[] args) throws ioexception {     //counters         int charscount = 0;         int wordscount = 0;         int linescount = 0;          scanner in = null;         file file = new file("sample.txt");          try(scanner scanner = new scanner(new bufferedreader(new filereader(file)))){              while (scanner.hasnextline()) {                  string tmpstr = scanner.nextline();                 if (!tmpstr.equalsignorecase("")) {                     string replaceall = tmpstr.replaceall("\\s+", "");                     charscount += replaceall.length();                     wordscount += tmpstr.split("\\s+").length;                 }                 ++linescount;             }          system.out.println("# of chars: " + charscount);         system.out.println("# of words: " + wordscount);         system.out.println("# of lines: " + linescount);         system.out.println("# of bytes: " + file.length());          }     } }

to unique words , counts:
1. split obtained line file string array
2. store contents of string array in hashset
3. repeat steps 1 , 2 till end of file
4. unique words , count hashset

i prefer posting logic , pseudo code op learn solving posted problem.


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