Newbie Java Programming Error
Hello there,
I'm brand new to Java and have. I'm taking my 2nd Java class at school and I'm pretty lost at this point. I realize there are other postings regarding this topic and I have looked through them but have not been able to get an answer to my problem.
The main problem I'm having right now is I cannot get my code to execute. My code will compile, but when I try to execute it, either just using the "java" command or executing from TextPad, I get the following error:
Exception in thread "main" java.lang.NoClassDefFoundError: MortgagePayment1
Press any key to continue . . .
In my last class, my compiler was working fine and I could easily execute all of my applications. However, I stupidly ran Windows Updates and it installed Java 6 on my computer and nothing has worked right since.
When I execute "java -version" from a command line, this is what I get:
java version "1.6.0_01"
Java(TM) SE Runtime Environment (build 1.6.0_01-b06)
Java HotSpot(TM) Client VM (build 1.6.0_01-b06, mixed mode, sharing)
My environmet variables look like this:
CLASSPATH - C:\Program Files\Java\jdk1.6.0_01\lib;C:\Program Files\Java\jre1.6.0_01\lib
PATH - C:\Program Files\Java\jdk1.6.0_01\lib;%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem
I'm using TextPad verion 5.0.3.
Here's the code I've compiled and am trying to execute:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.border.*;
import java.text.DecimalFormat;
public class MortgagePayment1 extends JFrame implements ActionListener
{
private JTextField mortgageAmount;
private JTextField mortgageTerm;
private JTextField interestRate;
private JTextField mortgagePaymentAmount;
private JButton calculateBtn;
private JButton quitBtn;
public MortgagePayment1() {
JPanel contentPane = (JPanel)getContentPane();
contentPane.setLayout(new BorderLayout(0, 4));
JPanel northPanel = new JPanel();
Border b = BorderFactory.createEtchedBorder();
northPanel.setBorder(BorderFactory.createTitledBor der(b, "Calculate Mortgage Payment", TitledBorder.TOP, TitledBorder.CENTER));
northPanel.setLayout(new GridLayout(4, 2, 10, 10));
JLabel mortgageAmountLabel = new JLabel("Input Initial Mortgage Amount (dollars)", JLabel.RIGHT);
JLabel mortgageTermLabel = new JLabel("Input Mortgage Term (years)", JLabel.RIGHT);
JLabel interestRateLabel = new JLabel("Input Interest Rate", JLabel.RIGHT);
JLabel mortgagePaymentAmountLabel = new JLabel("Mortgage Payment Amount", JLabel.RIGHT);
mortgageAmount = new JTextField(10);
mortgageTerm = new JTextField(10);
interestRate = new JTextField(10);
mortgagePaymentAmount = new JTextField(10);
northPanel.add(mortgageAmount);
northPanel.add(mortgageTerm);
northPanel.add(interestRate);
northPanel.add(mortgagePaymentAmount);
northPanel.add(mortgageAmountLabel);
northPanel.add(mortgageTermLabel);
northPanel.add(interestRateLabel);
northPanel.add(mortgagePaymentAmountLabel);
// add the rest of labels and textfields
JPanel southPanel = new JPanel();
calculateBtn = new JButton("Calculate");
southPanel.add(calculateBtn);
calculateBtn.addActionListener(this);
quitBtn = new JButton("Quit");
southPanel.add(quitBtn);
quitBtn.addActionListener(this);
contentPane.add(northPanel, BorderLayout.NORTH);
contentPane.add(southPanel, BorderLayout.SOUTH);
}
public void actionPerformed(ActionEvent evt)
{
JButton sourceBtn = (JButton)evt.getSource();
if (sourceBtn == calculateBtn)
{
//calculate monthly payment
//.... set mortgagePaymentAmount textfield to monthly payment.
}
else if (sourceBtn == quitBtn)
{
System.exit(0);
}
}//close actionPerformed method
public static void main(String[] args)
{
MortgagePayment1 mp1 = new MortgagePayment1();
mp1.setTitle("Mortgage Payment: Assignment 1 developed by ...");
mp1.pack();
mp1.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
Window w = e.getWindow();
w.setVisible(false);
w.dispose();
System.exit(0);
}//close windowClosing method
});//close addWindowListener method
mp1.setVisible(true);
}//close Main method
}//close MortgagePayment1 class
Any help would be greatly appreciated!!!!!!!
