Java Flow of execution - overridden method gets executed first than the constructor

Question

I have the following code, in the same java file.

import javax.swing.SwingUtilities;
import java.io.File;

public class MainClass2{
   public static void main(String[] args){
       SwingUtilities.invokeLater(new Runnable(){
             public void run() {
                 javax.swing.JFileChooser jfc = new MyFileChooser();
                     File file = jfc.getSelectedFile();
             }

      });
   }
}

class MyFileChooser extends javax.swing.JFileChooser{
    public MyFileChooser(){
        System.out.println("constructor call");
    }
    @Override
    public java.io.File getSelectedFile(){
        System.out.println("call to getSelectedFile");
        return null;
    }
}

When I run it, the output gives me

call to getSelectedFile

constructor call

call to getSelectedFile

Shouldn't the output be

constructor call

call to getSelectedFile

I'm using java 5.

Answer 1

MyFileChooser's constructor is equivalent to:

public MyFileChooser() {
    super(); // ***
    System.out.println("constructor call");
}

The first call to getSelectedFile() is made by MyFileChooser's base class constructor, which is invoked implicitly at the point marked *** above, before the System.out.println("constructor call").

Here is the stack trace:

MyFileChooser.getSelectedFile() line: 16    
AquaFileChooserUI.installComponents(JFileChooser) line: 1436    
AquaFileChooserUI.installUI(JComponent) line: 122   
MyFileChooser(JComponent).setUI(ComponentUI) line: 670  
MyFileChooser(JFileChooser).updateUI() line: 1798   
MyFileChooser(JFileChooser).setup(FileSystemView) line: 360 
MyFileChooser(JFileChooser).<init>(File, FileSystemView) line: 333  
MyFileChooser(JFileChooser).<init>() line: 286  
MyFileChooser.<init>() line: 11