JLabel没有显示

Question

我有一个没有显示的ImageIcon的JLabel。

public class Lockscreen extends JFrame {
    JPanel layer;
    JButton signin;
    ImageIcon heartlock;
    String heartlockpath;
    JLabel heartlockdisplay;
    String arrowpath;

    public Lockscreen(){

        super("Startseite");
        setSize(700, 400);
        setLocation(100, 100);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


        arrowpath = "C:\\Users\\saydanan\\Pictures\\FürMyDiary\\Right_Arrow.png";
        signin = new JButton();
        signin.setSize(19, 12);
        signin.setIcon(new ImageIcon(arrowpath));
        signin.setLocation(250, 500);

        heartlockpath = "C:\\Users\\saydananPicturesFürMyDiary\\082326-green-jelly-icon-business-lock-heart.png";
        heartlock = new ImageIcon(heartlockpath);
        heartlockdisplay = new JLabel();
        heartlockdisplay.setIcon(heartlock);
        heartlockdisplay.setLocation(250, 250);
        heartlockdisplay.setSize(heartlock.getIconWidth(), heartlock.getIconHeight());
        heartlockdisplay.setVisible(true);


        layer = new JPanel();
        layer.setBackground(Color.black);
        /*layer.setLayout(...);*/
        addEverything(layer);
        getContentPane().add(layer);
        setVisible(true);
    }

    public void addEverything(JPanel panel){
       panel.add(signin);
       panel.add(heartlockdisplay);
       panel.repaint();
    }

}

Answer 1

您需要添加它，然后将其设置为可见。

如：

panel.add(heartlockdisplay);
heartlockdisplay.setVisible(true);
panel.setVisible(true);