问Java swing + UI比例

EN

public class Test{

public static void main(String[] args) throws Exception{

    System.setProperty("sun.java2d.uiScale", "1.5");
    JFrame j = new JFrame();
    Image img = ImageIO.read(new File("D:\\1.png"));
    j.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    j.setPreferredSize(new Dimension(300, 150));
    j.setVisible(true);
    j.setLocationRelativeTo(null);
    j.setLayout(new BorderLayout());

    img = img.getScaledInstance((int) (60 * 1.5),(int) (60 * 1.5),Image.SCALE_DEFAULT);

    JToggleButton tb = new JToggleButton(){
        @Override
        protected void paintComponent(Graphics g) {

            Graphics2D g2 = (Graphics2D) g;
            g2.scale(0.67,0.67);
            super.paintComponent(g2);
        }
    };
    tb.setIcon(new ImageIcon(img));

    JToggleButton tb2 = new JToggleButton(){
        @Override
        protected void paintComponent(Graphics g) {

            Graphics2D g2 = (Graphics2D) g;
            g2.scale(0.67,0.67);
            super.paintComponent(g2);
        }
    };
    tb2.setIcon(new ImageIcon(img));


    JPanel jPanel = new JPanel(){

    };
    jPanel.setLayout(new GridLayout(1,1));
    jPanel.add(tb);
    jPanel.setBackground(Color.RED);



    JPanel content = new JPanel();
    content.setLayout(new FlowLayout());
    content.add(jPanel);

    j.setContentPane(content);
    j.pack();
}