PPT Slide

import java.util.*;

import java.io.*;

public class CountWords {

static public void main(String[] args) {

HashSet words = new HashSet();

BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

String delim = " \t\n.,:;?!-/()[]\"\'";

String line;

int count = 0;

try {

while ((line = in.readLine()) != null) {

StringTokenizer st = new StringTokenizer(line, delim);

while (st.hasMoreTokens()) {

count++;

words.add(st.nextToken().toLowerCase());

}

} catch (IOException e) {}

System.out.println("Total number of words: " + count);

System.out.println("Number of different words: " + words.size());

}