从 JButton 移除边框

Question

I would have a problem with the edges of my jbutton . In practice, in the code below I inserted a button that should not have edges but instead appear as in the photo below.

        JButton btnRes = new JButton();
        btnRes.setBorderPainted(false);
        btnRes.setContentAreaFilled(false);
        btnRes.setOpaque(false);
        btnRes.setBorder(null);
        btnRes.setIcon(new ImageIcon(Main.class.getResource(image1)));
        btnRes.setPressedIcon(new ImageIcon(Main.class.getResource(image2)));
        btnRes.setRolloverIcon(new ImageIcon(Main.class.getResource(image3)));
        btnRes.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
            //TODO
            }
        });
        btnRes.setBounds(496, 342, 138, 48);
        frame.getContentPane().add(btnRes); 

and this is the result:

Image of this JButton

The border is however visible, how I can fix this?

Answer 1

You see the border that is added to the button because it is selected. Try:

btnRes.setFocusPainted(false);