JFileChooser fileopen = new JFileChooser();
int ret = fileopen.showDialog(null, "Выбрать файл");

JButton button = new JButton("Выбрать первый файл");
        button.setAlignmentX(CENTER_ALIGNMENT);
        button.addActionListener(new ActionListener() {
        	public void actionPerformed(ActionEvent e) {
        		JFileChooser fileopen = new JFileChooser();
                fileopen.addChoosableFileFilter(new ImageFilter());
                fileopen.setAcceptAllFileFilterUsed(false);
                int ret = fileopen.showDialog(null, "Выбрать файл");
                if (ret == JFileChooser.APPROVE_OPTION) {
                    file1 = fileopen.getSelectedFile();
                    label.setText(file1.getName());                    
                    image1 = setImage(file1.getName());
                }
            }
 });