trying to add text file elements to an array list

Question

I"m currently trying to read text from a text file (of course) and then trying to add them to my arraylist but it's not working when i try to use the add method.

import java.io.*;
import java.util.*;
import java.lang.Object.*;
public class Inventory
{
private String store;
private ArrayList<Flooring> products = new ArrayList();
public Inventory(String args[], ArrayList<Flooring> products) throws IOException{
    FileReader reader = new FileReader("Lowes.txt");
    BufferedReader text = new BufferedReader(reader);
    String line = text.readLine();

    while(line != null){
        products.add(line);
        line = text.readLine();
    }

    FileReader reader1 = new FileReader("Sam's Club Flooring.txt");
    BufferedReader text1 = new BufferedReader(reader1);

    FileReader reader2 = new FileReader("Home Depot.txt");
    BufferedReader text2 = new BufferedReader(reader2);
}

}

What is Flooring. Do you really need to import import java.lang.Object.*; — Kartic
– Kartic, Commented Dec 2, 2015 at 14:34

Jordi Castilla · Accepted Answer · 2015-12-02 14:41:51Z

1

The add method is not working because the ArrayList contains objects of type Flooring. So it will only accept Flooring objects and not String.

private ArrayList<Flooring> products = new ArrayList();

SOLUTIONS:

Change type to ArrayList<String>
Fill some String attribute of a Flooring object and add it to list

edited Dec 2, 2015 at 14:41

answered Dec 2, 2015 at 14:34

Jordi Castilla

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7 Comments

S.Powell Over a year ago

So pretty much i can create a "Flooring = text.readLine();" and it would read the flooring as the string in the text file?

Jordi Castilla Over a year ago

what? Flooring = text.readLine() is not valid, but you can use String s = text.readLine() as I explain in answer

Jordi Castilla Over a year ago

Also, what is Flooring object? Post the class code in the question

S.Powell Over a year ago

Well the Array List is supposed to hold Strings of text from the file and the Text is types of Wood flooring, so i figured that the object type would be flooring, but it would never compile so i changed it to being String... and also I am not very good with using stackoverflow so i have no clue on how to do something on this feed... sorry..

Jordi Castilla Over a year ago

nono, text types does not mind here, just use ArrayList<String> instead of ArrayList<Flooring>

|

SomeJavaGuy · Accepted Answer · 2015-12-02 14:33:59Z

0

your ArrayList is defined to only hold variables of the type Flooring, hence you can´t add String values to it.

You might want to change the List definition to List<String>.

Or you want to to create new instances of Flooring depending on the line.

products.add(new Flooring(line));

answered Dec 2, 2015 at 14:33

SomeJavaGuy

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Comments

Aragorn · Accepted Answer · 2015-12-02 14:34:19Z

0

products is an ArrayList of Flooring objects, you are trying to add line to it. line is a String.

If you want to add line, you want to initialize your products List like this:

private ArrayList<String> products = new ArrayList<String>();

answered Dec 2, 2015 at 14:34

Aragorn

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Comments

Desaretiuss · Accepted Answer · 2015-12-02 14:36:33Z

0

You cannot add String object to a non String arraylist.

private ArrayList<Flooring> products = new ArrayList();

This line clearly defines that ArrayList products will accept only objects of class Flooring.

answered Dec 2, 2015 at 14:36

Desaretiuss

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S.Powell · Accepted Answer · 2015-12-03 17:44:43Z

0

The add method is not working because the ArrayList contains objects of type Flooring. So it will only accept Flooring objects and not String.

private ArrayList products = new ArrayList(); SOLUTIONS:

Change type to ArrayList Fill some String attribute of a Flooring object and add it to lis

answered Dec 3, 2015 at 17:44

S.Powell

1

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