Question

How to display an image to JPanel or to JLabel using the BufferedImage?
I load an Image using FileChooser and I need to display what I’ve loaded.
I don’t extend my class to any container.

Answer 1

Override paintComponents(g) paintComponent(g) method of JPanel or JLabel and draw image in it. Something like follow:

    JPanel panel = new JPanel(){
        @Override
        public void paintComponent(Graphics g) {
            BufferedImage image = null; // get your buffered image.
            Graphics2D graphics2d = (Graphics2D) g;
            graphics2d.drawImage(image, 0, 0, null);
            super.paintComponents(g);
        }
    };

Same thing for JLabel. Or in another way:

    BufferedImage image = null; // get your buffered image.
    ImageIcon icon = new ImageIcon((Image)image);
    JLabel label = new JLabel();
    label.setIcon(icon);

As you are saying that you are loading image from FileChooser it can be done in following
way:

    ImageIcon icon = new ImageIcon(
              fileChooser.getCurrentDirectory().toString()
              +"/"+fileChooser.getSelectedFile().getName());

Now you can use ImageIcon in JLabel or add it in JPanel.

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Above code is sample code and not tested so not necessary to run without error. You might need to change it as per your need.