public abstract class EField extends javax.swing.JTextField 
					implements java.awt.event.ActionListener
{
	public EField()
	{	this.addActionListener (this);
	}

	public EField text (String title)
	{	this.setText (title);
		return this;
	}

	public EField width (int wide)
	{	this.setColumns (wide);
		return this;
	}

	public void actionPerformed (java.awt.event.ActionEvent e)
	{	onEnter();
	}

	public abstract void onEnter();    // to be overridden in a subclass
}