CODEWITHSUNDEEP
javaswingarraylisttextfield
dyonas
dyonas

Reputation: 1

Search Data in an ArrayList that saved in a file and print it out in a texfield

i have this button that save input data via textfield in an ArrayLists and save it to a file.

private void btnSaveAActionPerformed(java.awt.event.ActionEvent evt) {                                         
    BankAccount account = new BankAccount();
    ButtonGroup bg = new ButtonGroup();
    bg.add(rad_savings);
    bg.add(rad_checking);

    account.setAccountName(txt_accountname.getText());
    account.setAccountNo(txt_accountnumber.getText());
    list.add(account);

    String fileName = "bank.txt";
    FileWriter file = null;

    try {
        file = new FileWriter(fileName,true);
        PrintWriter pw = new PrintWriter(file);
        for(BankAccount str: list) {
            pw.println(str);
        }

        pw.flush();
        pw.println("\n");


    } catch(FileNotFoundException ex) {
        JOptionPane.showMessageDialog(this, "Can't create your account!");
    } catch (IOException ex) {
        Logger.getLogger(JFrameNewAccount.class.getName()).log(Level.SEVERE, null, ex);
    } finally {
        try {
            file.close();
        } catch (IOException ex) {
            Logger.getLogger(JFrameNewAccount.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

I also have a textfield for Withdraw_AccountName and Withdraw_AccountNumber, how can i search the account number inside the arraylists? When Withdraw_AccountNumber match with the account number in the arraylists, it will also display the account name in the Withdraw_AccountName. Please help.

Upvotes: 0

Views: 327

Answers (1)

greedybuddha
greedybuddha

Reputation: 7507

you will need to iterate over the BankAccounts to find the one that has the account number you need. 

for(BankAccount account: list) {
    if (account.getAccountNo().equals(accountNumberToSearchFor)){
        // found ya! set the correct text field
        break;
    }
}

Alternatively you could store the BankAccounts in a Map, where you make a map of account numbers to bank accounts; or, you could also make a custom comparator and use a Java Collection that is now sorted by the account number.

Upvotes: 1

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