Phone number stringtokenizer problem

[jacques5309]

how would I go about writing a class that uses the stringtokenizer to identify the three parts of a phone number? (using three methods)

[joshdgreen]

Why must you have 3 methods?

[jacques5309]

I'm not sure the reasoning, probably since we are just starting with the stringtokenizer.

This is the exact question I was given:

1. Write a class that uses the StringTokenizer class to identify
the parts of a phone number. Assume that the format of the phone
number is (nnn) nnn-nnnn. Example (860) 222-3344. The class should
have at least three public methods: one returning the area code,
one returning the exchange and one returning the extension.

[joshdgreen]

Do you know how to set up the 3 methods at least? I'm not sure how much you already know about Java. Also, posting some code you already have would help a lot.

[jacques5309]

I just really have no clue how to write it. I'm starting at ground zero trying to figure it out.

[joshdgreen]

This will help get you started with writing the methods: Defining Methods (The Java™ Tutorials > Learning the Java Language > Classes and Objects)

I really don't think we can help until you have some sort of code posted that we can look at.

[jacques5309]

Something like :

StringTokenizer tokenizer = StringTokenizer("() -");


String areaCode = tokenizer.nextToken();
String exchange = tokenizer.nextToken();
String extension = tokenizer.nextToken();

but creating a class for each areacode exchange and extension, so it can be used in other java applications.

[joshdgreen]

Here is something to get you started. I've made comments in the code for you to take a look at to make sure you understand each part.

import java.util.StringTokenizer;

public class tokens 
{
	public static void main(String[] args) 
	{
		String phone = "(555) 454-3456"; // The phone number.
		String areaCode = getAreaCode(phone); // Gets the area code from a method.
		System.out.print(areaCode); // Prints just the area code to the screen.
	}
	
	public static String getAreaCode(String phone)
	{
		// Creates tokenizer for the phone number that grabs
		// anything in between parenthesis (). Which is what
		// we want.
		
		StringTokenizer areaCode = new StringTokenizer(phone, "()");
		return areaCode.nextToken(); // Returns just the area code in
		                             // between the parenthesis.
	}
}

[jacques5309]

hey thanks a lot, that really got the ball rolling!

[artur]

hi i have to write exactly the same class and i'm having a lot of trouble
can someone explain to me how should i do it ?

[Fubarable]

hi i have to write exactly the same class and i'm having a lot of trouble
can someone explain to me how should i do it ?

Please don't hijack someone else's old thread. Instead go to the New to Java forum and start your own new thread where you can ask this question. Provide pertinent details such as your code and your exact problems including any and all error messages.

And shoot, the answer to the fellow's question is already posted in this thread!

Locking.