如何使用 UIManager 更改按钮属性

Question

目前正在开发一个使用 Java 的 Mail API 编程的电子邮件客户端项目。我在尝试使用 UIManager 更改 Swing 中的某些属性时遇到问题。

JOptionPane 的特定部分目前看起来像这样：

可以看到按钮颜色没有随着当前代码的变化而变化：

protected static Credentials credentialHandler() {
    String EMAIL = null;
    String PASSWORD = null;

    UIManager.put("OptionPane.background",new ColorUIResource(32, 38, 44));
    UIManager.put("OptionPane.foreground",Color.WHITE);
    UIManager.put("Panel.background",new ColorUIResource(32, 38, 44));
    UIManager.put("TextField.background",new ColorUIResource(62, 68, 74));
    UIManager.put("TextField.foreground",Color.WHITE);
    UIManager.put("Label.foreground",Color.WHITE);
    UIManager.put("PasswordField.foreground",Color.WHITE);
    UIManager.put("Button.background",new ColorUIResource(62, 68, 74));
    JPanel panel = new JPanel();

    JLabel labelEmail = new JLabel("Enter an email:");
    labelEmail.setForeground(Color.WHITE);
    JTextField email = new JTextField(32);
    email.setBackground(new Color(32, 38, 44));
    JLabel labelPass = new JLabel("Enter a password:");
    JPasswordField pass = new JPasswordField(16);
    pass.setBackground(new Color(32, 38, 44));
    panel.add(labelEmail);
    panel.add(email);
    panel.add(labelPass);
    panel.add(pass);
    String[] options1 = new String[]{"Login", "Cancel"};
    int option1 = JOptionPane.showOptionDialog(null, panel, "Credentials",
            JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.PLAIN_MESSAGE,
            null, options1, options1[1]);
    if (option1 == 0) {
        EMAIL = email.getText();
        char[] passwordChar = pass.getPassword();
        PASSWORD = new String(passwordChar);
    } else {
        JOptionPane.showMessageDialog(null, "Looks like you exited the program. If you think this is a mistake, please report it to the developer!");
        System.exit(2);
    }
    return new Credentials(EMAIL, PASSWORD);
}

我想更改按钮的背景颜色以及字体颜色（假设它与前景有关）。

Answer 1

将new ColorUIResource(62, 68, 74) 替换为new java.awt.Color(62, 68, 74)。

/* Add following "import":
 * import java.awt.Color;
 */
UIManager.put("Button.background", new Color(62, 68, 74));

要设置字体颜色，请使用以下命令（将JButton 文本颜色设置为白色）：

UIManager.put("Button.foreground", Color.white);