Java assignment

[Dullahan]

Code Select

import java.io.*;
public class Friends
{
    static String search;
    static int option = 0;
    static int exit = 0;
    static int optionAgain;
    static int exitAgain = 0;
    public static void main (String [] args) throws IOException
    {
        String personName;
        String personAddress;
        String personCity;
        String personProvince;
        String personCountry;
        String personNumber;
        String numberAddress;
        String fileName = "address.dat";
        String lineData;

        System.out.println ("Please choose an option");
        System.out.println ("1 - Show list");
        System.out.println ("2 - Find a name");
        System.out.println ("3 - Add to the list");
        while (exit == 0)
        {
            option = ReadLib.readInt ();
            if (option == 1)
            {
                lineData = "";
                System.out.println ("Open the file 'address' to find the list.");
                FileReader inFile = new FileReader (fileName);
                BufferedReader inBuffer = new BufferedReader (inFile);
                while (lineData != null)
                {
                    lineData = inBuffer.readLine ();
                    System.out.println (lineData);
                }
                //if statement so that it will read each line and display on the screen
                exit++;
                inBuffer.close ();
            }
            else if (option == 2)
            {
                System.out.println ("Please enter a last name:");
                search = ReadLib.readString ();

                FileReader inFile = new FileReader (fileName);
                BufferedReader inBuffer = new BufferedReader (inFile);
                exit++;

                inBuffer.close ();
            }
            else if (option == 3)
            {
                System.out.println ("You have selected to add to the list");
                exit++;
                FileWriter outFile = new FileWriter (fileName, true);
                BufferedWriter outBuffer = new BufferedWriter (outFile);
                PrintWriter printFile = new PrintWriter (outBuffer);
                while (exitAgain <= 200)
                {
                    System.out.print ("Please enter a name: ");
                    personName = ReadLib.readString ();
                    System.out.print ("Please enter a house number: ");
                    numberAddress = ReadLib.readString ();
                    System.out.print ("Please enter a street name: ");
                    personAddress = ReadLib.readString ();
                    System.out.print ("Please enter a city: ");
                    personCity = ReadLib.readString ();
                    System.out.print ("Please enter a province or state: ");
                    personProvince = ReadLib.readString ();
                    System.out.print ("Please enter a country: ");
                    personCountry = ReadLib.readString ();
                    System.out.print ("Please enter a phone number: ");
                    personNumber = ReadLib.readString ();
                    //asks you questions and then gives you thew space needed to type in
                    printFile.println (personName);
                    printFile.println (numberAddress + " " + personAddress + ", " + personCity + ", " + personProvince + ", " + personCountry);
                    printFile.println (personNumber);
                    printFile.println (" ");
                    //makes it so that the file you open will have the things that you typed into it
                    System.out.println ("Please enter an option:");
                    System.out.println ("1 - Continue");
                    System.out.println ("2 - Finish");
                    option = ReadLib.readInt ();
                    if (optionAgain == 1)
                    {
                    }
                    else if (optionAgain == 2)
                    {
                        exit = 201;
                    }
                    else
                    {
                        System.out.println ("Incorrect number. Please choose the numbers given.");
                    }
                    //gives you the option to continue or quit
                    exitAgain++;
                }
                outBuffer.close ();
            }
            else
            {
                System.out.println ("Invalid. Please enter 1, 2, or 3 for options."); //gives error
            }
        }

    } // main method

} // Friends classI got stuck on this part:

else if (option == 2)
            {
                System.out.println ("Please enter a last name:");
                search = ReadLib.readString ();

                FileReader inFile = new FileReader (fileName);
                BufferedReader inBuffer = new BufferedReader (inFile);
                exit++;

                inBuffer.close ();
            }

I'm trying to figure out how I can search a name, and see if it matches any of the ones displayed in the list.

Anyone know what I should do? :'(

[Dullahan]

Okay, here's what I did:

else if (option == 2)
{
System.out.println ("Please enter a last name:");
search = ReadLib.readString ();

FileReader inFile = new FileReader (fileName);
BufferedReader inBuffer = new BufferedReader (inFile);

if (search == lineData)
{
lineData = inBuffer.readLine ();
System.out.println ("Results:");
System.out.println ("");
System.out.println (lineData);
}
else
{
System.out.println ("Sorry, you did not mathc any results.");
}

exit++;

inBuffer.close ();
}

I don't have the program with me at the moment, but I feel that there could be an error in result. Any logic problems you can see?

[Daddy]

What's the error given? also, .matches() might help. It returns either true or false.

Code Select

if (fooBar.matches(search)){
//whatever you want to do if there is a match
}
else{
}

I think. I haven't done much in Java recently. I'll look through my old assignments.


lol you posted that while i was searching for the method name ;_;

[Dullahan]

What's the error given? also, .matches() might help. It returns either true or false.

Code Select

if (fooBar.matches(search)){
//whatever you want to do if there is a match
}
else{
}

I think. I haven't done much in Java recently. I'll look through my old assignments.


lol you posted that while i was searching for the method name ;_;

Oh, I don't know yet. I can't download Java here because our harddrive is too small.

But it was worth searching for the method because I don't think I'm right. Hopefully it's a logic error and it would be easy to fix because I don't see how I could get a syntax.

[thezerofire]

I think there is a class string.equals("*word*") that you can use, but I'm not sure anymore.