Java

return data type

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Join Date: Mar 2006

Posts: 2

Reputation: Nazzy is an unknown quantity at this point

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Nazzy

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Newbie Poster

return data type

Mar 7th, 2006

Hello,

I am having a lot of difficulty with this program. I have to find the data types of strings that have been inputted by users into the command line. I have used StringTokenizer to break data into strings but I am not sure where to go from there. How do I take these tokens and find out what data types they are.

Thanks

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Join Date: Aug 2005

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Reputation: hooknc is an unknown quantity at this point

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hooknc

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Re: return data type

Mar 8th, 2006

Do you have any test data that we could see? What is an expected input and then the corresponding output?

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Join Date: Mar 2006

Posts: 2

Reputation: Nazzy is an unknown quantity at this point

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Nazzy

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Newbie Poster

Re: return data type

Mar 8th, 2006

This is what i have so far:

// File: Classify.java

// Purpose: classifies input into primitive types or String

import java.io.*;
import java.util.StringTokenizer;

public class Classify {

public static void main(String[] args) throws IOException {
BufferedReader in = new BufferedReader(
new InputStreamReader(System.in));
String str = in.readLine();
while (str != null) {
StringTokenizer tokenizer = new StringTokenizer(str);
while (tokenizer.hasMoreTokens()) {
String token = tokenizer.nextToken();

}

str = in.readLine();
}
} // main

} // class Classify

Thanks.

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Join Date: Aug 2005

Posts: 5,266

Reputation: iamthwee is a splendid one to behold

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iamthwee

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Posting Expert

Re: return data type

Mar 8th, 2006

•

Originally Posted by Nazzy

This is what i have so far:

// File: Classify.java

// Purpose: classifies input into primitive types or String

import java.io.*;
import java.util.StringTokenizer;

public class Classify {

public static void main(String[] args) throws IOException {
BufferedReader in = new BufferedReader(
new InputStreamReader(System.in));
String str = in.readLine();
while (str != null) {
StringTokenizer tokenizer = new StringTokenizer(str);
while (tokenizer.hasMoreTokens()) {
String token = tokenizer.nextToken();

}

str = in.readLine();
}
} // main

} // class Classify

Thanks.

Erm, that's not test data, that's your program. Tee he he.

*Voted best profile in the world*

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Join Date: Jun 2004

Posts: 2,108

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server_crash server_crash is offline

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Postaholic

Re: return data type

Mar 8th, 2006

Well, you could write boolean methods like this:

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
 
boolean testInt(String s)
{
   try
   {
      Integer.parseInt(s);
   }
   catch(Exception e)
   {
      return false;
   }
   return true;
}
boolean testInt(String s)
{
   try
   {
      Integer.parseInt(s);
   }
   catch(Exception e)
   {
      return false;
   }
   return true;
}