title: method must call super() error in Netbeans
body: <p>Recently I've made a Netbeans project and I am using SVN along with it. I am seeing duplicate class error, and in the console it says</p>
  
  <p><code>java.lang.VerifyError: (class: pie/chart/explorer/PieChartExplorer, method: &lt;init&gt; signature: ()V) Constructor must call super() or this()<br>
      Could not find the main class: pie.chart.explorer.PieChartExplorer.  Program will exit.<br>
      Exception in thread "main" Java Result: 1</code></p>
  
  <p>Here is PieChartExplorer.java:</p>
  
  <pre><code>package pie.chart.explorer;
  
  import java.awt.*;
  import java.awt.event.ActionEvent;
  import java.awt.event.ActionListener;
  import javax.swing.*;
  
  public class PieChartExplorer extends JFrame implements ActionListener {
  
  
      JTextField one = new JTextField(10);
       JTextField two = new JTextField(10);
        JTextField three = new JTextField(10);
      JButton sub = new JButton("Click to be amazed");
  
  
      public PieChartExplorer() {
          super("Pie Chart Explorer");
          setSize(300,100);
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          FlowLayout flo = new FlowLayout();
          setLayout(flo);
          setVisible(true);
          add(one);
          add(two);
          add(three);
          sub.addActionListener(this);;
          add(sub);
  
      }
  
      public static void main(String[] args) {
          PieChartExplorer app = new PieChartExplorer();
      }
  
      @Override
      public void actionPerformed(ActionEvent e) {
          Object source = e.getSource();
  
          if(source == sub) {
              try {
              Pie show = new Pie(Float.parseFloat(one.getText()),Float.parseFloat(two.getText()),Float.parseFloat(three.getText()));
              } catch(Exception ex) {
                  JOptionPane.showMessageDialog(this, "Please check entered data");
  
              }
          }
      }
  
  }
  </code></pre>
  
  <p>I have tried: </p>
  
  <ol>
  <li>Clean and Rebuild project</li>
  <li>Making sure that I have called super in all constructors</li>
  </ol>
  
  <p>How can this be fixed? <a href="http://www.mediafire.com/?kby3dfjqz99jui8">Code for download</a>. </p>