[mattyeend]

So far, what I have is:

private int find(String name){
    for(int i = 0; i < this.size; i++)
         {
             if(
                name.equals
                (this.theDirectory[i],getName()))
                {
                    
                }
         }
    }

And I have:

public String lookUpEntry(String name) {
        if name found{
            getNumber = return;
        }
        else{
            return null;
        }
    }

The pseudo code I was given was:

use find to locate position of entry 
 if entry is found 
 use getNumber to return the telno 
 else 
 return null

I am aware that I need to find method before doing the lookUpEntry method. There are a few errors within the code and I'm unsure why this is so

[mike73]

private int find(String name){
    for(int i = 0; i < this.size; i++)
         {
             if(
                name.equals
                (this.theDirectory[i],getName()))
                {
                    
                }
         }
    }

Firstly

06                (this.theDirectory[i],getName()))

You have a comma instead of a period before getName(). You have declared this method to return an int, so you need to do that.

Seconldy, post your errors and complete soruce code

This post has been edited by mike73: 27 April 2014 - 09:49 AM

[mattyeend]

Sorry

import java.io.File;
import java.io.PrintWriter;
import java.util.Scanner;

public class ArrayPhoneDirectory implements PhoneDirectory
{
    private static final int INIT_CAPACITY = 100; 
    private final int capacity = INIT_CAPACITY; 
 
    // holds telno of directory entries 
 
    private int size = 0; 

    // Array to contain directory entries 

    private final DirectoryEntry[] theDirectory = new DirectoryEntry[capacity]; 

    // Holds name of data file 

    private final String sourceName = "telnos.txt"; 

    // Flag to indicate whether directory was modified since it was last loaded or saved 

    private final boolean modified = false;
    private String telnumber;

    /**
     *
     * @param sourceName
     */
    public void loadData(String sourceName)
    {
        try
        {
            Scanner reader = new Scanner(new File(sourceName));
            while(reader.hasNext())
            {
                String name = reader.nextLine();
               
                String telno = reader.nextLine();
              
                this.theDirectory[this.size] = new DirectoryEntry(name, telno);
              
                this.size++;
                } 
            reader.close();
            }
        catch(Exception e)
        {
            System.out.printf("File not found%n");   
        }
        }
    
    public String lookUpEntry(String name) {
        if name found{
            getNumber = return;
        }
        else{
            return null;
        }
    }
    public String addChangeEntry(String name, String telno) {}
    public String removeEntry(String name) {}
    public void save() {}
    public String format() {}
    private int find(String name){
    for(int i = 0; i < this.size; i++)
         {
             if(
                name.equals
                (this.theDirectory[i].getName()))
                {
                    
                }
         }
    }
    private void add(String name, String telno){}
    private void reallocate(){}
    
}

This post has been edited by andrewsw: 27 April 2014 - 09:52 AM
Reason for edit:: Removed unnecessary previous quote

[mattyeend]

And the errors are on lines 62, 63, 64, 66, 70, 71, 73, 74

[mike73]

Let's start with the obvious:

55        if name found{

this is still pseudocode. What are you trying to do here?

This post has been edited by mike73: 27 April 2014 - 10:40 AM

[mattyeend]

I'm trying to find the name of that's already in a file. The folder this is in is called telephonedirectory, so I'm aiming to make a phone directory, and I'm stuck on this bit of it

[mike73]

Well it's not valid Java code, so it won't compile. What is the difference between that method and the one you have called find?

Otherwise:

62    public String addChangeEntry(String name, String telno) {}
63    public String removeEntry(String name) {}
65    public String format() {}

These 3 methods are declared to return a String, which you are not doing. If they are intended to just set a value, then declare their return type as void.

[mattyeend]

So this is what I have now

import java.io.File;
import java.io.PrintWriter;
import java.util.Scanner;

public class ArrayPhoneDirectory implements PhoneDirectory
{
    private static final int INIT_CAPACITY = 100; 
    private final int capacity = INIT_CAPACITY; 
 
    // holds telno of directory entries 
 
    private int size = 0; 

    // Array to contain directory entries 

    private final DirectoryEntry[] theDirectory = new DirectoryEntry[capacity]; 

    // Holds name of data file 

    private final String sourceName = "telnos.txt"; 

    // Flag to indicate whether directory was modified since it was last loaded or saved 

    private final boolean modified = false;
    private String telnumber;

    /**
     *
     * @param sourceName
     */
    public void loadData(String sourceName)
    {
        try
        {
            Scanner reader = new Scanner(new File(sourceName));
            while(reader.hasNext())
            {
                String name = reader.nextLine();
               
                String telno = reader.nextLine();
              
                this.theDirectory[this.size] = new DirectoryEntry(name, telno);
              
                this.size++;
                } 
            reader.close();
            }
        catch(Exception e)
        {
            System.out.printf("File not found%n");   
        }
        }
    
    public String lookUpEntry(String name) {
        if name found{
            getNumber = return;
        }
        else{
            return null;
        }
    }
    public String addChangeEntry(String name, String telno) {
        return null;
    }
    public String removeEntry(String name) {
        return null;
    }
    public void save() {}
    public String format() {
        return null;
    }
    private int find(String name){
    for(int i = 0; i < this.size; i++)
         {
             if(
                name.equals
                (this.theDirectory[i].getName()))
                {
                    
                }
         }
    }
    private void add(String name, String telno){}
    private void reallocate(){}
    
}

I want to get the find and the lookUpEntry methods done before the other few

[macosxnerd101]

If the find() method is supposed to return the index of the element once you've found it, I'd just return i once you have found a match. If you don't find a match, the convention is to return -1.

[mattyeend]

How do I do that?

[macosxnerd101]

I pretty much just spelled it out for you. Read your find() method. When have you found a match? What section of code handles that?

[mattyeend]

Oh right, yeah, thanks