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plz correct code

prathimaprasun rao
Ranch Hand

Joined: Jun 29, 2006
Posts: 55
Hello everyone,
I have to read a question from command line. Then I need to count the number of words and display the number of words as output. This is the code I have written. But I am not able to get the output. Cud anyone correct the code.

import java.io.*;
public class wordcount {
private static long countWords(String line) {
long numWords = 0;
int index = 0;
boolean prevWhitespace = true;
while (index < line.length()) {
char c = line.charAt(index++);
boolean currWhitespace = Character.isWhitespace(c);
if (prevWhitespace && !currWhitespace) {
numWords++;
}
prevWhitespace = currWhitespace;
}
return numWords;
}


public static void main(String[] args ) throws IOException{
BufferedReader input = new BufferedReader( new InputStreamReader(System.in));
if (args.length == 0) {
countWords("stdin");
} else {
for (int i = 0; i < args.length; i++) {
countWords(args[i]);
}
}
}
}


Eagerly waiting for reply.
Keith Lynn
Ranch Hand

Joined: Feb 07, 2005
Posts: 2367
Are you not allowed to use other methods in the String class? Starting in 1.4 there is a method that could do that in one line.
Ernest Friedman-Hill
author and iconoclast
Marshal

Joined: Jul 08, 2003
Posts: 24187
    
  34

Your "countWords" method is returning a value, but your main() method is just ignoring it. main() should use, e.g., System.out.println() to actually display the result of calling the method.


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prathimaprasun rao
Ranch Hand

Joined: Jun 29, 2006
Posts: 55
hello everyone,

could anyone clearly explain where the error is?

thanks in advance.
prathimaprasun rao
Ranch Hand

Joined: Jun 29, 2006
Posts: 55
Hello Keith Lynn

could you please write the code for me how to do this in a single line.
the main idea is i need to read one sentence from command line and display the number of words present in it

thanks in advance
Ulf Dittmer
Marshal

Joined: Mar 22, 2005
Posts: 42931
    
  68
could you please write the code for me how to do this in a single line

No. This is an assignment that is supposed to teach you something. How are you going to learn if someone else does the work for you?
Keith Lynn
Ranch Hand

Joined: Feb 07, 2005
Posts: 2367
I agree with Ulf. If you read through the API for String, you will see several useful methods.
 
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subject: plz correct code