CODEWITHSUNDEEP
javaclassobjectuser-input
David
David

Reputation: 53

Java How do I create a unique object name?

How would I go about creating a unique object every time a user wants to create a new account?

For example if user makes an account I would like an object named acc1 then if a user makes another account i would like the object named acc2. Account ac = new Account(input.nextInt(),0,0);. This is around where i need it to happen.

I tried keeping the code as simplistic as possible and also note I'm rather new to java and this is a personal project just to learn.

 System.out.println("Welcome to JAVA Bank");
    System.out.println("____________________");
    System.out.println("Plese Choose an Option: ");
    System.out.println("");
    System.out.println("(1) New Account");
    System.out.println("(2) Enter Existing Account");



    int choice = input.nextInt();


    switch(choice){

        case 1:
            System.out.println("Please choose an Account ID#");
            Account ac = new Account(input.nextInt(),0,0);
            break;




public class Account {

private int id = 0;
private double balance = 0;
private double annualInterestRate = 0;
private Date dateCreated;

public Account(int id, double balance, double annualInterestRate) {
    this.id = id;
    this.balance = balance;
    this.annualInterestRate = annualInterestRate;
    this.dateCreated = new Date();

}

Help is appreciated thank you.

Upvotes: 4

Views: 1772

Answers (1)

CConard96
CConard96

Reputation: 914

If you are wanting a unique way of identifying multiple Accounts perhaps a HashMap is the way to go. A HashMap stores key-value pairs where each key is unique.

Create a class level variable to store the accounts:

Map<String, Account> accounts = new HashMap<String, Account>();

Create/Add account to HashMap:

case 1:
    System.out.println("Please choose an Account ID#");
    int accountID = input.nextInt(); //Get the requested ID
    if (accounts.containsKey("acc"+accountID) //Check to see if an account already has this ID (I added acc to the start of each account but it is optional)
    {
       //Tell user the account ID is in use already and then stop
       System.out.println("Account: " + accountID + " already exists!");
       break;
    }

        //Create account and add it to the HashMap using the unique identifier key
        Account ac = new Account(input.nextInt(),0,0);
        accounts.put("acc"+accountID, ac);

Upvotes: 4

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