Array list questions

[fobber]

Hi all,

I would like to know how to write an Array list containing strings and store it into a class.

Also, I would like to know how to read an arraylist from this example:

public static Account readAccount(String fileName)
{
Account aAcct = new Account(0, fileName);
ArrayList ArrayList = new ArrayList();
aAcct = new Account("123", "Al Bob", "213 123 4567");
return aAcct;
}

[Aradon]

Hi all,

I would like to know how to write an Array list containing strings and store it into a class.

Also, I would like to know how to read an arraylist from this example:

public static Account readAccount(String fileName)
{
Account aAcct = new Account(0, fileName);
ArrayList ArrayList = new ArrayList();
aAcct = new Account("123", "Al Bob", "213 123 4567");
return aAcct;
}


You could go through the array list just like you would go through an array using a for loop.

Arraylist has methods such as size and get(int) that allow you to do this. So for example


import java.util.*;
public class testArrayList
{
public static void main(String args[])
{
ArrayList<String> lst = new ArrayList<String>();
lst.add("this");
lst.add("is");
lst.add("an");
lst.add("ArrayList");

for(int i = 0; i < lst.size(); i++)
System.out.print(lst.get(i) + " ");
}
}


You can also do it through Iterators and through foreach loops!
java foreach:

import java.util.*;
public class testArrayList
{
public static void main(String args[])
{
ArrayList<String> lst = new ArrayList<String>();
lst.add("this");
lst.add("is");
lst.add("an");
lst.add("ArrayList");

for(String element ; lst)
System.out.print(element + " ");
}
}

[fobber]

Thank you for replying.

I guess for my question regarding array list, is I want any user to put certain strings, and then store it into an array.

An example of what I am looking for is the bank account, which I want to store the account number, name, and a balance (double). I am looking to create different accounts, and store it to an array.

From my GUI, it looks like this

String inputName;
String inputPhoneNum;
inputName = JOptionPane.showInputDialog("Enter your name: ");
inputPhoneNum = JOptionPane.showInputDialog("Enter your phone number: ");
String input = JOptionPane.showInputDialog("Enter the deposit amount: ");
double amount = Double.parseDouble(input);
Teller tel = new Teller();
tel.createAccount(inputName, inputPhoneNum, amount);

I want to put 2 strings and 1 double in an array. I would like to create a new account and store it. The problem is I dont know how to write that part.

public void writeAccount(ArrayList aAccts, String name, String accNum,
String phoneNum, double amount)
{
/*this. aAccts = aAccts;
this.name = name;
this.accNum = accNum;
this.phoneNum = phoneNum;
this.amount = amount;*/
ArrayList aL = new ArrayList();
aL.add(name);
aL.add(accNum);
aL.add(phoneNum);
//aL.addAll(amount);
System.out.print(aAccts);