Thread: What's wrong with my code

package Enrollment;
 
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
 
public class Login extends JFrame{
 
    public String name;
    JTextField txtUsername;
 
    public Login(){
 
        setLayout(new FlowLayout());
        txtUsername = new JTextField(" ", 10);
        add(txtUsername);
 
        JButton btnLogin = new JButton("Login");
        add(btnLogin);
 
        btnLogin.addActionListener(new ButtonListener());
    }
 
    private class ButtonListener implements ActionListener{
        @Override
          public void actionPerformed(ActionEvent e){
 
           if(name == txtUsername.getText()){
                Student StudentRegistration = new Student();
                StudentRegistration.run();
                StudentRegistration.lblName.setText(name);
                dispose();
           };
 
 
        }
 
    }
 
    public void run(){
        setTitle("Login");
        setBounds(200,200,350,200);
        setVisible(true);
        setResizable(false);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}

package Enrollment;
 
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
 
public class Student extends JFrame {
 
    Container con = null;
    JLabel picStudent;
    JLabel lblName;
 
    public Student(){
 
        con = getContentPane();
        con.setLayout(null);
 
        ImageIcon imh = new ImageIcon(getClass().getResource("Images/bg.jpg"));
        Icon studpic = new ImageIcon(getClass().getResource("Images/studpic.jpg"));
        setSize(imh.getIconWidth(), imh.getIconHeight());
 
         JPanel panel = new JPanel(){
             @Override
            public void paintComponent(Graphics g) 
            {
                Image imh = new ImageIcon("Images/bg.jpg").getImage();
                Dimension size = new Dimension(imh.getWidth(null), imh.getHeight(null));
                setPreferredSize(size);
                setMinimumSize(size);
                setMaximumSize(size);
                setSize(size);
                setLayout(null);
                g.drawImage(imh, 0, 0, null);
            } 
         };
         con.add(panel);
         panel.setBounds(0, 0, imh.getIconWidth(), imh.getIconHeight());
         JPanel panelcontent = new JPanel(new FlowLayout());
         panelcontent.setBounds(0,0,200,200);
         panel.add(panelcontent);
         picStudent = new JLabel(studpic);
         lblName = new JLabel();
         panelcontent.add(picStudent);
         panelcontent.add(lblName);
}
 
    public void run(){
 
         setTitle("Student Registration");
         setBounds(0,0,575,431);
         setVisible(true);
         setResizable(false);
         setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
    }
}

package Enrollment;
 
 
public class Main {
    public static void main(String[] args){
 
        Login login = new Login();
        login.run();
 
 
 
 
    }
 
 
}

this is my error output

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at javax.swing.ImageIcon.<init>(ImageIcon.java:205)
at Enrollment.Student.<init>(Student.java:19)
at Enrollment.Login$ButtonListener.actionPerformed(Lo gin.java:29)
at javax.swing.AbstractButton.fireActionPerformed(Abs tractButton.java:2018)

Yes, all of my image file is at the right location.