seeting background image or color in JFrame in swing

public class JavaApplication12 extends JFrame {
    public void go()
      {
           JFrame frame=new JFrame();
        JButton wel=new JButton("WELCOME TO NOTE-MAKING STORE");
         Container c = JFrame.getContentPane();
         c.setBackground(Color.red);
    
      
  
       try{
        frame.setContentPane(new JLabel(new ImageIcon(ImageIO.read(new File("E:\\ad5.jpg")))));
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
      
      
         frame.getContentPane().add(wel);
         frame.setSize(1500,1500);
         frame.setVisible(true);
      
       //  frame.setContentPane(new JLabel(new ImageIcon("D:\\ad4.png")));
        
   wel.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent e)
        {
            new video();

        }
    });
      }
    public static void main(String[] args) {
       JavaApplication12 obj=new JavaApplication12();
       obj.go();
        }
  

    }

I am getting 2 errors,one is the background image is just attached to the centre so I am unable to see the button which was placed already in the centre

then secondly my background color is not set for the frame.