Java Swing accesing parent data from child dialog

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Java

Swing

dialog

I made a JFrame parent and Jdialog child. But I am not able to access the modified value of the variable
of parent from the child class. code:

import [swing packages needed];

public class grading extends JFrame implements ActionListener
{
	public int me=4; //this one
	JTextField jt;

grading()
{
	Container c=getContentPane();
	// set the layout

	jt=new JTextField(30);
	jt.addActionListener(this);
	c.add(jt);

	setSize(800,600);
	show();

}

public void actionPerformed(ActionEvent a) // pressed enter key in the textfield
{
	me=2; //changed me value

	JOptionPane.showMessageDialog(null,(me)+" is me from parent"); //displayed : 2

	child jd=new child(this); //calls dialog
	jd.setVisible(true);
	}

public static void main(String ar[])
{
	grading Gr=new grading();
	//close window handling 
}

}


class child extends JDialog
{
	JTextField jta[];

child(JFrame frame)
{
	super(frame,true);
	Container c=getContentPane();
	c.setLayout(new FlowLayout());

	grading gr=new grading();
	JOptionPane.showMessageDialog(null,(gr.me)+" is me from child"); //shows 4

	setSize(400,300);
	setDefaultCloseOperation(DISPOSE_ON_CLOSE);
}
}

Recommended modifications?