Message Box In Java [Using Plain AWT]

Message Box In Java [Using Plain AWT]

    import java.awt.*;
    import java.awt.event.*;
    public class MsgBox extends Dialog implements ActionListener
    {  
    private Button ok,can;
    public boolean isOk = false;
    /*  * @param frame parent frame
        * @param msg message to be displayed
        * @param okcan true : ok cancel buttons, false : ok button only   */  

    MsgBox(Frame frame, String msg, boolean okcan)
    super(frame, "Message", true);
    setLayout(new BorderLayout());
    add("Center",new Label(msg));
    addOKCancelPanel(okcan);
    createFrame();
    pack();
    setVisible(true);
    }

    MsgBox(Frame frame, String msg)
    {  this(frame, msg, false);  }
    void addOKCancelPanel( boolean okcan )
    {  Panel p = new Panel();
    p.setLayout(new FlowLayout());
    createOKButton( p );
    if (okcan == true)
    createCancelButton( p );
    add("South",p);  
    }

    void createOKButton(Panel p)
    {  
    p.add(ok = new Button("OK"));
    ok.addActionListener(this);
    }

    void createCancelButton(Panel p)
    {
    p.add(can = new Button("Cancel"));
    can.addActionListener(this);
    }

    void createFrame()
    {
    Dimension d = getToolkit().getScreenSize();
    setLocation(d.width/3,d.height/3);
    }

    public void actionPerformed(ActionEvent ae)
    {
    if(ae.getSource() == ok)
    {  
    isOk = true;  setVisible(false);
    }
    else if(ae.getSource() == can)
    {  
    setVisible(false);
    }
    }

    public static void main(String args[])
    {
    Frame f = new Frame();
    f.setSize(200,200);
    f.setVisible(true);
    MsgBox message = new MsgBox  (f , "Hey you user, are you sure ?", true);
    if (message.isOk)
    System.out.println("Ok pressed");
    if (!message.isOk)
    System.out.println("Cancel pressed");
    message.dispose();
    }
    }