Re: Compile error

From:

PSUnderwood <paulu71555@fastmail.fm>

Newsgroups:

comp.lang.java.help

Date:

Mon, 10 Jul 2006 22:29:38 -0400

Message-ID:

<G2Esg.200$Nl2.194@fe05.lga>

I've seen this post before. The problems are:

1. The declaration of formPanel is commented out; it should not be.
2. The closing brace of the (commented out) main function is not
commented out. It should be.
3. There is a stray closing brace in method calculate(), after the
calculation of payments. It should be removed.
4. Add a closing brace at the end of the file

These changes (locations marked with --> below) allowed the code to run
for me.

import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.text.DecimalFormat;

//public class cbweek2Applet {
public class cbweek2Applet extends JApplet {

  double a, t, i, payments;
  JLabel amountLbl, termLbl, IntrateLbl, paymentsLbl;
  JTextField amountTf, termTf, intrateTf, paymentsTf;
  JButton calcBtn;

--> uncomment this line: // JFrame formPanel;
  Font font;
     DecimalFormat formatter = new DecimalFormat("0.00");

   // public cbweek2Applet() {
  public void init () {
   System.out.println("Starting Mortgage Calculator.");

   font = new Font("Arial",Font.BOLD,24);

   amountLbl = new JLabel("Loan Amount");
   termLbl = new JLabel("Terms");
   IntrateLbl = new JLabel("Interest Rate");
   paymentsLbl = new JLabel("Monthly amount");

   amountTf = new JTextField();
   termTf = new JTextField();
   intrateTf = new JTextField();
   paymentsTf = new JTextField();

   calcBtn = new JButton("Calculate");

   amountLbl.setFont(font);
   termLbl.setFont(font);
   IntrateLbl.setFont(font);
   paymentsLbl.setFont(font);
   amountTf.setFont(font);
   termTf.setFont(font);
   intrateTf.setFont(font);
   paymentsTf.setFont(font);
   calcBtn.setFont(font);

   formPanel = new JFrame("Mortgage Calculator");
   formPanel.setLayout(new GridLayout(6,6));
   formPanel.add(amountLbl);
   formPanel.add(amountTf);
   formPanel.add(termLbl);
   formPanel.add(termTf);
   formPanel.add(IntrateLbl);
   formPanel.add(intrateTf);
   formPanel.add(paymentsLbl);
   formPanel.add(paymentsTf);
   formPanel.add(calcBtn);

   formPanel.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

   calcBtn.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
     calculate();
    }
   });

   formPanel.setLocation(300, 200);

   formPanel.pack();
   formPanel.setVisible(true);

  }

// public static void main(String[] args) {
  // new cbweek2Applet();
--> comment this line: }

  private void calculate() {

   double a = Double.parseDouble(amountTf.getText()); // mortgage amount
   double t = Double.parseDouble(termTf.getText()); // mortgage term
   double i = Double.parseDouble(intrateTf.getText()); // interest rate
   double monthlyInt = (i/100)/ 12;
         double payments = (a * monthlyInt)
                     / (1 - Math.pow(1/ (1 + monthlyInt), t * 12)); //
calculations
--> comment this line: }
      { String result = formatter.format(payments);
         paymentsTf.setText("" + result);

}
}
--> add closing brace: }