public class PlayButton {
    public JButton play = getButton();

    private JButton getButton(){
        JButton button = new JButton("Играть");
        button.setSize(100,50);
        button.setMaximumSize(button.getSize());
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if(Desktop.isDesktopSupported()){
                    Desktop desktop = Desktop.getDesktop();
                    try {
                        desktop.open(new File("C:\\Users\\Oleg\\AppData\\Roaming\\minecraft.exe"));
                    } catch (IOException e1) {
                        e1.printStackTrace();
                    }
                }
            }
        });

        return button;
    }
}