Help. javac keeps making more than 1 class with a $2 at the end.

Question

I'm taking my first Java class and I'm supposed to submit 1 class per assignment for my 2nd assignment, javac is making practiceB$2 and practiceB$3.
here is the entire code
import javax.swing.*;
import java.awt.event.*;
public class practiceB {
JLabel label1;
int i=1;
public practiceB() {
// Create a window.
JFrame form1 = new JFrame("Main window");
form1.setSize(300,120);
form1.setVisible(true);
JPanel panel1 = new JPanel();
panel1.setLayout(null);
form1.getContentPane().add(panel1);
label1 = new JLabel("0");
label1.setBounds(10,10,100,20);
panel1.add(label1);
// Create a button and add it to the form1.
JButton button = new JButton("Click me");
button.setBounds(80,50,150,25);
panel1.add(button);
// Add an event handler for button clicks.
button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
label1.setText(e.getActionCommand() + " " + i);
i++;
// Make the form1 closable.
form1.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
public static void main(String[] args) {
new practiceB();
Even if I cut and paste the sample code I still get the same error
Edited by: 806143 on Oct 28, 2010 4:47 PM

Answer 1

806143 wrote:
Sorry, I figured there might be something wrong. We have to do 5 "labs" per assignment practice A through E then submit the classes A through E.
Submittal
1. Upon complete all the learning activities, create a zip file named lab2.zip with only the following files in it.
 practiceA.class
 practiceB.class
 practiceC.class
 practiceD.class
 practiceE.class
2. Upload the zipped file to Assignment 02 through Blackboard.
That's why I was bit confused.I'll bet that since your putting all your *.class* files in a zip folder, it would probably mean these are the files which contain the<tt> main() </tt>method, and that there will probably be more files therein. Just as long as professor can launch your app with these files, I'm sure you're good to go OP.