JOptionPane showConfirmDialog with only one button

try using this, it creates only one button

JOptionPane.showMessageDialog(null, "Loading Complete...!!!");

It's the JOptionPane.DEFAULT_OPTION

JOptionPane.showConfirmDialog(null,
                "MESSAGE",
                "TITLE",
                JOptionPane.DEFAULT_OPTION,
                JOptionPane.PLAIN_MESSAGE);

I want only OK button to be displayed there. Is it possible?

Use showOptionDialog() method.

    Object[] options = {"OK"};
    int n = JOptionPane.showOptionDialog(frame,
                   "Message here ","Title",
                   JOptionPane.PLAIN_MESSAGE,
                   JOptionPane.QUESTION_MESSAGE,
                   null,
                   options,
                   options[0]);