关于画线问题

这个程序的"orgX=e.getX()"和"orgY=e.getY()"这两个坐标的值为什么是0,0能
import java.awt.*;
import java.awt.event.*;
public class DrawLine
{
    Frame f=new Frame("DrawLine");
    public static void main(String[] args)
    {
        new DrawLine().init();
    }
    public void init()
    {
        f.setBounds(100,100,500,350);
        f.setVisible(true);
        f.addWindowListener(new WindowAdapter()
                                {
                                    public void windowClosing(WindowEvent e)
                                    {
                                        System.exit(0);
                                    }
                                });    
        f.addMouseListener(new MouseAdapter()
                               {
                                    int orgX;
                                    int orgY;
                                    public void mousePressd(MouseEvent e)
                                    {
                                        orgX=e.getX();
                                        orgY=e.getY();
                                    }
                                    public void mouseReleased(MouseEvent e)
                                    {
                                        Graphics g=f.getGraphics();
                                        g.setColor(Color.red);
                                        g.setFont(new Font("隶书",/*Font.ITALIC|*/Font.BOLD,20));
                                              //设置文本字体
                                        g.drawString(new String(orgX+","+orgY),orgX,orgY);
                                              //打印鼠标按下时的坐标文本
                                        g.drawString(new String(e.getX()+","+e.getY()),e.getX(),e.getY());
                                              //打印鼠标释放时的坐标文本   
                                        g.drawLine(orgX,orgY,e.getX(),e.getY());
                                        System.out.println(orgX);
                                        System.out.println(orgY);
                                    }    
                               });
    }
}