Exception for java Swing application?

Question

For some reason this is locking up the java application. Did I handle the exception correctly?

private void submitButtonActionPerformed(java.awt.event.ActionEvent evt)    {                                             
    double amount, interest,rateCalc, a, b, c, payment;
    int years, months;
    while (true){
        try{
            amount = Double.valueOf(loanAmount.getText());
            interest = Double.valueOf(interestRate.getText());
            years = Integer.valueOf(loanYears.getText());
            rateCalc = (interest/12);
            months = (years*12);
            a = Math.pow((1+rateCalc),months);
            b = (a*rateCalc);
            c = (a-1);
            payment = (amount *(b/c));
            monthlyPayment.setText("Mortgage Payment $ = " + payment);

        } catch (NumberFormatException nfe){
            javax.swing.JOptionPane.showMessageDialog(null,
                    "Please enter numbers and not letters");
            return;
        }
    }

}

monthlyPayment returns to the java app.

akf · Accepted Answer · 2010-05-29 21:54:56Z

2

You are creating a loop in the Event Dispatch Thread. This will cause your painting thread to spin, making it feel like your app is hanging and will not allow any other GUI actions to be performed.

I would remove the while(true) loop.

edited May 29, 2010 at 21:54

answered May 29, 2010 at 21:48

akf

39.6k8 gold badges89 silver badges96 bronze badges

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

Comments

Lasse Samson · Accepted Answer · 2010-05-29 21:50:58Z

0

Try removing the while(true) statement. It shouldn't be necessary in your case.

answered May 29, 2010 at 21:50

Lasse Samson

1,7523 gold badges18 silver badges17 bronze badges

Collectives™ on Stack Overflow

Exception for java Swing application?

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related