how to pass ArrayList in a constructor to another class

Question

I am new to java and trying to work on ArrayList. From Main method I want to >pass the ArrayList to another class CustomerAcc. I need help how to pass the >ArrayList and then how to get the ArrayList in the class Customer code here

import java.io.*;
import java.util.*;
import java.lang.Object;

public class CustomerMain {
    public static void main(String[] args) throws FileNotFoundException {
        ArrayList<String> custName = new ArrayList<String>();
        ArrayList<String> custZip = new ArrayList<String>();
        double count = 0;
        boolean done = false;
        System.out.print("Please enter Customer name or 'X' to exit: ");

        Scanner in = new Scanner(System.in);

        // Gets user input for name and zip code             
        while (in.hasNext() && !done) {
            String checkInput = in.next();

            if (checkInput.equalsIgnoreCase("X")) {
                done = true;
            }
            else {
                custName.add(checkInput);

                System.out.print("Please enter Zip code: ");
                custZip.add(in.next());
                count++;

                System.out.print("\nPlease enter Customer Name or 'X' to `enter code here`exit: ");
            }
        }
        //Sending the user input data to CustomerAcc class
        CustomerAcc custRecord = new CustomerAcc(custName, custZip, count);
    }
}

The CustomerAcc class :

public class CustomerAcc extends CustomerMain {

   public static void CustomerAcc(String custName, String custZip, int count){

   }
}

Please format your question correctly.

PC Luddite
– PC Luddite

2015-07-04 18:01:49 +00:00
Commented Jul 4, 2015 at 18:01 — PC Luddite
– PC Luddite, Commented Jul 4, 2015 at 18:01

Linux Le · Accepted Answer · 2015-07-04 18:45:48Z

1

If I understand well that you want to access an ArrayList in another class? if in the case, you can use the getter and setter technique while declaring private ArrayList variables.

private ArrayList<String> custName = new ArrayList<String>();  
private ArrayList<String> custZip = new ArrayList<String>();  



public void setCustName(ArrayList custName){
    this.custName = custName;
}

public ArrayList geCustName(){
    return custName;
}


public void setCustZip(ArrayList custZip){
    this.custZip = custZip;
}

public ArrayList geCustZip(){
    return custZip;
}

answered Jul 4, 2015 at 18:45

Linux Le

4561 gold badge4 silver badges8 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Karthik · Accepted Answer · 2015-07-04 18:04:53Z

0

Change constructor of your CustomerAcc class to:

 public CustomerAcc(ArrayList<String> custName, ArrayList<String> custZip, int count){

}

Also you have defined your custName and custZip as

     ArrayList custName = new ArrayList();
     ArrayList custZip = new ArrayList();

which is incorrect. You have to specify type of objects in your ArrayList (I suppose they are strings now.)

Define it like:

 ArrayList<String> custName = new ArrayList<>();

answered Jul 4, 2015 at 18:04

Karthik

5,0387 gold badges39 silver badges67 bronze badges

Comments

Raman Shrivastava · Accepted Answer · 2015-07-04 18:56:48Z

0

Syntax while speaking you can change your constructor code definition to -

public CustomerAcc(ArrayList<String> custName, ArrayList<String> custZip, int count){

}

Looking at your code, you could have used Map<String, String> for storing username and its zip, instead of using two lists.

On a separate note, Are you sure you're building single CustomerAcc object taking list of customers and their zipcodes as input?

answered Jul 4, 2015 at 18:56

Raman Shrivastava

2,95317 silver badges27 bronze badges

1 Comment

Molly Over a year ago

Hi Raman, I am working on my college project where I have customers first name, last name and the zip code. Then I have to write the info into the file. Before I could start on the project work I was trying to get information into the ArrayList.

Collectives™ on Stack Overflow

how to pass ArrayList in a constructor to another class

3 Answers 3

Comments

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related