How to make buttons of various formats in java?

Create a JLabel and place an image to your liking, in the texture you want and in the format you want. To simulate the effect of a button, overwrite the methods of mousePressed() , mouseReleased() and mouseMoved() .

When you hover over the image you should check whether the current point is transparent or not, so that you do not change the image wrongly, since your JLabel remains a rectangle but the image does not. You should also check at the time of the mouse click, not to allow the JLabel to be clicked if the mouse is over a transparent area of the image.

To correctly simulate the behavior of a button you should create an image for each state: imagem normal , imagem clicada and imagem com o mouse em cima .

Here are examples I've created:

pawn (regular) .png

pawn(hovering).png

pawn (clicking) .png

PutthefollowingcodeinsideyourconstructortoimplementexactlythealgorithmIwroteabove:

finalImageIconregular=newImageIcon(ClassLoader.getSystemResource("pawn(regular).png"));
final ImageIcon hovering = new ImageIcon(ClassLoader.getSystemResource("pawn(hovering).png"));
final ImageIcon clicking = new ImageIcon(ClassLoader.getSystemResource("pawn(clicking).png"));
final BufferedImage img = ImageIO.read(ClassLoader.getSystemResource("pawn(regular).png"));

final JLabel lblNewLabel = new JLabel(regular);
lblNewLabel.addMouseListener(new MouseAdapter() {
    @Override
    public void mousePressed(MouseEvent e) {
        int pixel = img.getRGB(e.getPoint().x, e.getPoint().y);
        if( (pixel>>24) == 0x00 ) {
            return;
        }
        else { 
            System.out.println("I was clicked! I really look like a button.");
            lblNewLabel.setIcon(clicking);
        }
        super.mousePressed(e);
    }
    @Override
    public void mouseReleased(MouseEvent e) {
        int pixel = img.getRGB(e.getPoint().x, e.getPoint().y);
        if( (pixel>>24) == 0x00 ) {
            lblNewLabel.setIcon(regular);
        }
        else {
            lblNewLabel.setIcon(hovering);                  
        }
        super.mouseReleased(e);
    }
});
lblNewLabel.addMouseMotionListener(new MouseMotionAdapter() {
    @Override
    public void mouseMoved(MouseEvent e) {
        int pixel = img.getRGB(e.getPoint().x, e.getPoint().y);
        if( (pixel>>24) == 0x00 ) {
            lblNewLabel.setIcon(regular);
            lblNewLabel.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
        }
        else {
            lblNewLabel.setIcon(hovering);
            lblNewLabel.setCursor(new Cursor(Cursor.HAND_CURSOR));
        }
        super.mouseMoved(e);
    }
});
contentPane.add(lblNewLabel);

To make it cooler I've moved the cursor to my hand when it's over a non-transparent area of JLabel.

I recently created a repository to make the complete project available on my GitHub , just download it and import it into Eclipse. All images are already in the repository for ease.

In my opinion, you are asking three different questions. I'll answer only one of them.

Round button

The Border class in Swing offers the possibility of using a radio:

private static class RoundedBorder implements Border {

    private int radius;

    RoundedBorder(int radius) {
        this.radius = radius;
    }
    public Insets getBorderInsets(Component c) {
        return new Insets(this.radius+1, this.radius+1, this.radius+2, this.radius);
    }


    public boolean isBorderOpaque() {
        return true;
    }


    public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {
        g.drawRoundRect(x,y,width-1,height-1,radius,radius);
    }
}

Then all you have to do is establish this class for the button:

jButton.setBorder(new RoundedBorder(50));

Results:

Source: SO, by Lalchand .