我正在开发一个游戏，可以在商店中升级你的属性。当你购买某个物品时，应该刷新显示你拥有的金币数量的JLabel标签。
有没有一种方法可以做到这一点，而不需要创建新的JFrame窗口？
public void actionPerformed(ActionEvent e) {
user.setCoin(user.getCoin() - 5);
user.setMaxJump(5);
EpixController.getInstance().coinsUpdate(user, -5);
SwingUtilities.updateComponentTreeUI(epix);
epix.revalidate();
epix.repaint();
}
这是ActionListener的代码，我希望刷新JFrame epix：
这里是View的代码：
public EpixView(User user) {
this.setUser(user);
JFrame epix = new JFrame();
System.out.println(user.getMaxJump());
epix.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
epix.setResizable(false);
epix.setBounds(100, 100, 801, 523);
epix.setLocationRelativeTo(null);
epix.getContentPane().removeAll();
/*
* menuCard
*/
menuCard.setLayout(null);
//coin
menuCardCoinImage.setBounds(0, 10, 64, 64);
menuCard.add(menuCardCoinImage);
menuCardCoinImage.setIcon(new ImageIcon(coinSpinPath));
menuCardCoinLabel = new JLabel("" + getUser().getCoin());
menuCardCoinLabel.setFont(new Font("Modern No. 20", Font.PLAIN, 26));
menuCardCoinLabel.setBounds(67, 10, 56, 64);
menuCard.add(menuCardCoinLabel);
//player
menuCardPlayerLabel = new JLabel("Willkommen zurück, " + getUser().getUsername());
menuCardPlayerLabel.setBounds(598, 18, 239, 36);
menuCard.add(menuCardPlayerLabel);
spielenButton.setBounds(485, 319, 89, 23);
menuCard.add(spielenButton);
ranglisteButton.setBounds(485, 353, 89, 23);
menuCard.add(ranglisteButton);
menuCardBackgroundImage.setIcon(new ImageIcon(backgroundPath));
menuCardBackgroundImage.setBounds(0, 0, 801, 523);
menuCard.add(menuCardBackgroundImage);
cards.add(menuCard, "menuCard");
/*
* upgradeCard
*/
upgradeCard.setLayout(null);
//coin
upgradeCardCoinImage.setBounds(0, 10, 64, 64);
upgradeCardCoinImage.setIcon(new ImageIcon(coinSpinPath));
upgradeCard.add(upgradeCardCoinImage);
upgradeCardCoinLabel = new JLabel(""+ getUser().getCoin());
upgradeCardCoinLabel.setBounds(67, 10, 56, 64);
upgradeCardCoinLabel.setFont(new Font("Modern No. 20", Font.PLAIN, 26));
upgradeCard.add(upgradeCardCoinLabel);
//player
upgradeCardPlayerLabel = new JLabel("Willkommen zurück, " + getUser().getUsername());
upgradeCardPlayerLabel.setBounds(598, 18, 239, 36);
upgradeCard.add(upgradeCardPlayerLabel);
//maxHealthBar
healthLabel.setHorizontalAlignment(SwingConstants.RIGHT);
healthLabel.setBounds(191, 127, 110, 36);
upgradeCard.add(healthLabel);
JProgressBar maxHealthBar = new JProgressBar();
maxHealthBar.setValue(0);
maxHealthBar.setBounds(327, 127, 185, 36);
upgradeCard.add(maxHealthBar);
plusHealthButton.setBounds(522, 130, 41, 30);
upgradeCard.add(plusHealthButton);
//maxJumpBar
jumpLabel.setHorizontalAlignment(SwingConstants.RIGHT);
jumpLabel.setBounds(191, 174, 110, 36);
upgradeCard.add(jumpLabel);
JProgressBar maxJumpBar = new JProgressBar();
maxJumpBar.setValue(0);
maxJumpBar.setBounds(327, 174, 185, 36);
upgradeCard.add(maxJumpBar);
plusJumpButton.setBounds(522, 177, 41, 30);
plusJumpButton.addActionListener(new PlusJumpListener(getUser(), maxJumpBar, epix));
upgradeCard.add(plusJumpButton);
//maxSpeed
speedLabel.setHorizontalAlignment(SwingConstants.RIGHT);
speedLabel.setBounds(191, 221, 110, 36);
upgradeCard.add(speedLabel);
JProgressBar maxSpeedBar = new JProgressBar();
maxSpeedBar.setValue(0);
maxSpeedBar.setBounds(327, 221, 185, 36);
upgradeCard.add(maxSpeedBar);
plusSpeedButton.setBounds(522, 224, 41, 30);
upgradeCard.add(plusSpeedButton);
//damageBar
damageLabel.setHorizontalAlignment(SwingConstants.RIGHT);
damageLabel.setBounds(191, 268, 110, 36);
upgradeCard.add(damageLabel);
JProgressBar damageBar = new JProgressBar();
damageBar.setValue(0);
damageBar.setBounds(327, 268, 185, 36);
upgradeCard.add(damageBar);
plusDamageButton.setBounds(522, 271, 41, 30);
upgradeCard.add(plusDamageButton);
levelAuswählenButton.setBounds(395, 361, 168, 30);
upgradeCard.add(levelAuswählenButton);
upgradeZurückButton.setBounds(254, 361, 131, 30);
upgradeCard.add(upgradeZurückButton);
upgradeCardBackgroundImage.setBounds(0, 0, 801, 523);
upgradeCardBackgroundImage.setIcon(new ImageIcon(backgroundPath));
upgradeCard.add(upgradeCardBackgroundImage);
cards.add(upgradeCard, "upgradeCard");
/*
* levelAuswahlCard
*/
levelAuswahlCard.setLayout(null);
level1Button.setBounds(67, 159, 171, 170);
EpixController.getInstance().checkLevelSaved(user, level1Button);
levelAuswahlCard.add(level1Button);
level2Button.setBounds(308, 159, 171, 170);
EpixController.getInstance().checkLevelSaved(user, level2Button);
levelAuswahlCard.add(level2Button);
bossLevelButton.setBounds(550, 159, 171, 170);
EpixController.getInstance().checkLevelSaved(user, bossLevelButton);
levelAuswahlCard.add(bossLevelButton);
levelZurückBtton.setBounds(334, 378, 121, 28);
levelAuswahlCard.add(levelZurückBtton);
levelAuswahlCardCoinImage.setBounds(0, 10, 64, 64);
levelAuswahlCardCoinImage.setIcon(new ImageIcon(coinSpinPath));
levelAuswahlCard.add(levelAuswahlCardCoinImage);
levelAuswahlCardCoinLabel = new JLabel("" + getUser().getCoin());
levelAuswahlCardCoinLabel.setBounds(67, 10, 56, 64);
levelAuswahlCardCoinLabel.setFont(new Font("Modern No. 20", Font.PLAIN, 26));
levelAuswahlCard.add(levelAuswahlCardCoinLabel);
levelAuswahlCardPlayerLabel = new JLabel("Willkommen zurück, " + getUser().getUsername());
levelAuswahlCardPlayerLabel.setBounds(598, 18, 239, 36);
levelAuswahlCard.add(levelAuswahlCardPlayerLabel);
levelAuswahlCardBackgroundImage.setIcon(new ImageIcon(backgroundPath));
levelAuswahlCardBackgroundImage.setBounds(0, 0, 801, 523);
levelAuswahlCard.add(levelAuswahlCardBackgroundImage);
cards.add(levelAuswahlCard, "levelAuswahlCard");
/*
* Listener
*/
//menuCard
spielenButton.addActionListener(new MenuCardButtonListener(cards));
//upgradeCard
upgradeZurückButton.addActionListener(new UpgradeCardButtonListener(cards));
levelAuswählenButton.addActionListener(new UpgradeCardButtonListener(cards));
//levelAuswahlCard
levelZurückBtton.addActionListener(new LevelAuswahlCardButtonListener(cards, getUser(), epix));
level1Button.addActionListener(new LevelAuswahlCardButtonListener(cards, getUser(), epix));
level2Button.addActionListener(new LevelAuswahlCardButtonListener(cards, getUser(), epix));
bossLevelButton.addActionListener(new LevelAuswahlCardButtonListener(cards, getUser(), epix));
epix.setContentPane(cards);
epix.setVisible(true);
}