Ok, so I am working on a minecraft quiz, and I have a problem exporting my code. When I run it in eclipse it works fine. But when I try to export it, it says it finished with warnings. And when I try to run the executable Jar file, it won't work. The part that has the error is this part:
public static void main(String args[]) {

And this is all of my code:
package Main;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;

import javax.swing.*;
@SuppressWarnings("serial")
public class main extends JDialog {

static String

Name = JOptionPane.showInputDialog(null, "Enter Your Name:");


List<Question> questions = new ArrayList<Question>();
int score=0;
ButtonGroup group = new ButtonGroup();
JButton btnOk = new JButton("Next Question");
public main(){
super();
setModal(true);
setLayout(new BoxLayout(getContentPane(),BoxLayout.Y_AXIS));
btnOk.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
setVisible(false);
}
});
questions.add(new Question("How many iron ingots does it take to make an Iron golem?", new String[]{"10", "50", "45", "35"}, "45"));
questions.add(new Question("What was the original name of Minecraft going to be?", new String[]{"Mine Game", "Total Miner","Mob Slayer", "Cave Miner","Minecraft"}, "Cave Miner"));
questions.add(new Question("How much health does a normal palyer have when they spawn in a world?", new String[]{"10", "20", "3", "100"}, "20"));
questions.add(new Question("What do most people hate the most about Minecraft?", new String[]{"Sponge's", "Lagg", "The name", "Monsters"}, "Lagg"));
questions.add(new Question("What surface do you travel slower on?", new String[]{"Ice", "Soul Sand", "Ice below Soul Sand", "Ice above Soul Sand", "Lava"}, "Ice below Soul Sand"));
questions.add(new Question("What is the square root of 64? (Yes, this is related to Minecraft, max stack size 64)", new String[]{"3", "6", "1", "8", "64"}, "8"));
questions.add(new Question("How many wooden tools are there in Minecraft?", new String[]{"5", "4", "38", "6"}, "4"));
questions.add(new Question("What was the coding language that was used to create Minecraft?", new String[]{"DOS", "Javascript", "Java", "HTML", "XHTML", "C++"}, "Java"));
questions.add(new Question("Is there a command to do /warp in default Minecraft?", new String[]{"Yes", "No"}, "No"));
questions.add(new Question("Who did Notch give the ownership of Minecraft to?", new String[]{"Notch", "Jeb", "Dinnerbone"}, "Jeb"));
questions.add(new Question("What materials do you need to create a watch?", new String[]{"Gold, iron, redstone", "Gold, redstone", "Iron, redstone", "Gold, Iron, Redstone, Compass"}, "Gold, redstone"));
}
public int startQuiz(){
int score=0;
for (Question q : questions){
displayQuestion(q);
if (group.getSelection().getActionCommand().equals(q.getCorrectAnswer())){
score++;
}
}
dispose();
return score;
}
private void displayQuestion(Question q){
getContentPane().removeAll();
for (Enumeration<AbstractButton> buttonGroup=group.getElements(); buttonGroup.hasMoreElements(); ){
group.remove((AbstractButton)buttonGroup.nextElement());
}
JLabel questionText = new JLabel(q.getQuestion());
getContentPane().add(questionText);
for (String answer : q.getAnswers()){
JRadioButton radio = new JRadioButton(answer);
radio.setActionCommand(answer);
group.add(radio);
getContentPane().add(radio);
}
getContentPane().add(btnOk);
pack();
setVisible(true);
}
public static void main(String args[]) {
main quiz = new main();
int score = quiz.startQuiz();
JOptionPane.showMessageDialog(null,"Your score on the minecraft quiz is is: "+score,"",JOptionPane.INFORMATION_MESSAGE);
JOptionPane.showMessageDialog(null, "Quiz made by: gabe4356, question ideas by: TacticalToaster.");
JOptionPane.showMessageDialog(null, "I hope you enjoyed the game " + Name);
}
class Question {
String question="";
String[] answers;
String correctAnswer;
public Question(String question, String[] possibleAnswers, String correctAnswer){
this.question = question;
this.answers = possibleAnswers;
this.correctAnswer = correctAnswer;
}
public String getQuestion() {
return question;
}
public String[] getAnswers() {
return answers;
}
public String getCorrectAnswer() {
return correctAnswer;
}
}
}

Please help?