Which wayis the best practice ?

Question

Hi ,
I am doubt of which way is the best practice to initialize instance component in a Panel.
ie .is there any diference, in terms of performance , between initializing component inside the constructor or just outside of constructor?
1)
public class MyPanel extends JPanel
private static JScrollPane scrollPane = new JScrollPane();
public CustomerTaskPane()
2)
public class MyPanel extends JPanel
private static JScrollPane scrollPane = null;
public CustomerTaskPane()
scrollPane = new JScrollPane()
}

Answer 1

Correction for the above reply.
*btw can i avoid from declaring the static field of a class itself when i need to implement the class which follows Singleton pattern like.
public class CustomerMainPanel extends JPanel
public static CustomerMainPanel customerMainPanel = null;
public static synchronized CustomerMainPanel getInstance()
if( customerMainPanel == null )
customerMainPanel = new CustomerMainPanel();
return customerMainPanel;
}