Don't know why there are white in the above, for help how to remove the white border, don't know something wrong with the code
ImageIcon img1=new ImageIcon (" SRC/my4/mainbk1. JPG ");
JLabel jumpers jl1=new JLabel (img1);
JPanel j1=new JPanel ();
JFrame frameregister=new JFrame (" home page ");
Frameregister. SetContentPane (j1);
J1. Add (jumpers jl1);
JPanel jj1=new JPanel ();
Jumpers jl1. Add (jj1);
Frameregister. SetSize (1700, 1000);
Frameregister. SetLocationRelativeTo (null);//window centered
Jj1. SetSize (1700, 1000);/* * set size/
Jj1. SetOpaque (false);/* will be in charge on the control panel is set to */
Frameregister. SetResizable (false);//whether can zoom window
Frameregister. SetVisible (true);//display window
Frameregister. SetDefaultCloseOperation (WindowConstants. EXIT_ON_CLOSE);