import java.awt.*;
import javax.swing.*;
 
public class HelpDialog{
    public HelpDialog(JFrame f)
    {
        JDialog jdAbout=new JDialog(f,"Help",true);
        Container content=jdAbout.getContentPane();
        JLabel jl1=new JLabel("Notepad 1.0");
        JLabel jl3=new JLabel("Email：4443480**@qq.com");
        content.setLayout(new GridLayout(3,1));
        content.add(jl1);
        content.add(jl3);
        jdAbout.setDefaultCloseOperation( JDialog.DISPOSE_ON_CLOSE);
        jdAbout.setVisible(true);
        jdAbout.setLocationRelativeTo(f);
        jdAbout.setSize(200, 100);
    }
}