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Thread: need help with phone number program for homework

  1. #1
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    Default need help with phone number program for homework

    New to Java programming and need help with my program. The program should output

    1:919:882:5000
    5000
    1
    882
    919

    driver program
    public class SSProg1
    public static void main(String[] args)
    {
    SSDissector phone = new SSDissector("1:919:882:5000");
    System.out.println(phone.getPhoneNumber());
    System.out.println(phone.getPhoneNumber(4));
    System.out.println(phone.getPhoneNumber(1));
    System.out.println(phone.getPhoneNumber(3));
    System.out.println(phone.getPhoneNumber(2));
    }
    class file
    public class SSDissector
    {
    private String colonSeparated; // Full phone number with colon's
    private String countryCode; // Country Code of the phone number only
    private int areaCode; // Area code of the phone number only
    private int prefix; // Prefix of the phone number only
    private int number; // Last four digits of the phone number only
    //************************************************** ******************************
    public SSDissector(String colonSeparated)
    {
    this.colonSeparated = colonSeparated;
    int index1 = colonSeparated.indexOf(":");
    this.countryCode = colonSeparated.substring(index1 - 1, 1);
    //System.out.println(countryCode);
    int index2 = colonSeparated.indexOf(':');
    String areaCode = colonSeparated.substring(index2 + 1, 5);
    //System.out.println(areaCode);
    //this.prefix = prefix;
    int index3 = colonSeparated.lastIndexOf(':');
    String prefix = colonSeparated.substring(index3 - 3, 9);
    //System.out.println(prefix);
    int index4 = colonSeparated.lastIndexOf(':');
    String number = colonSeparated.substring(index4 + 1);
    //System.out.println(number);
    }
    //************************************************** ********************************
    // This method returns the string colonSeparated
    public String getPhoneNumber()
    {
    return this.colonSeparated;
    }// End getPhoneNumber()
    //************************************************** ********************************
    // This Method returns the corrisponding section of the number
    public int getPhoneNumber(int x)
    {
    if (x==1)
    {
    int countryCodeInt = Integer.parseInt(countryCode);
    return countryCodeInt;
    }
    if (x==2)
    {
    return areaCode;
    }
    if (x==3)
    {
    return prefix;
    }
    if (x==4)
    {
    return number;
    }
    else
    {
    return number;
    }
    }// End getPhoneNumber(int)
    }// End MFDissector


  2. #2
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    Default Re: need help with phone number program for homework

    Hello stevolabo!

    String areaCode = colonSeparated.substring(index2 + 1, 5);
    Can you explain what are you trying to do here (in the left side of the assignment)? If you are trying to cast your class member areaCode from int to String, firstly this is not the appropriate way and secondly an int cannot be casted to String.
    I think that it would help if you made all of your class's members Strings, instead of having some of them ints and others Strings.
    And please wrap your code with the highlight tags to improve its readability.
    Hope it helps.

  3. #3
    Super Moderator Norm's Avatar
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    Default Re: need help with phone number program for homework

    Please post what the program currently prints out
    If you don't understand my answer, don't ignore it, ask a question.

  4. #4
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    Default Re: need help with phone number program for homework

    This is what I'm trying to do


    YourInitialsDissector.java
    Implement a YourInitialsDissector.java class that stores the phone number as a colon separated string of numbers and as four separate pieces described below.
    You must implement all of the following:

    colonSeparated – a colon separated String. Example value: "1:919:882:5000"
    countryCode – stored as a String as it could hold 001
    areaCode, prefix, number – stored as int variables

    This constructor receives one parameter, a colon-separated string. You may assume that the parameter’s value is valid (i.e., no error checking required). The constructor initializes the instance variables with appropriate values. There are many ways to solve the problem of extracting the sections from the given colon separated string. You are required to use String methods to extract the individual sections as strings, and then use parseInt method calls to convert the strings to int’s for those that need it. Do NOT use split as it has not been covered yet.

    This is a standard accessor method that simply returns the colonSeparated instance variable’s value.

    This method receives the position of one of the section (1, 2, 3, or 4) and returns the section that’s at that position. Area Code is 1, etc.


    Sample Session:

    When using the main method specified above, your output should be:
    1:919:882:5000
    5000
    1
    882
    919

  5. #5
    Super Moderator Norm's Avatar
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    Default Re: need help with phone number program for homework

    Do you have any specific java programming questions?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: need help with phone number program for homework

    Sorry, I have took java 1 a while ago, and now am taking java 2. This is my first program back, and struggling. the driver class was given to us from our teacher. So I have to create the dissector program. The bottom part of the program isn't working. I'm wondering how to write the last part of the program?

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    Default Re: need help with phone number program for homework

    how to write the last part of the program
    Use an editor to write the code for the last of the program.
    If you have any specific java programming questions, ask them.
    How to write the code is not a specific question.
    If you don't understand my answer, don't ignore it, ask a question.

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