java如何在不创建新对象的情况下引用双精度值？

Question

我的问题是，我想制作一个通用代码块。getHalfDotTime方法和getHalfTime方法是许多类似方法中的两种

我不想为每个方法创建一个新的ActionListener，而是想在commonFormatting方法中创建ActionListener

当我这样做的时候，我遇到的问题是声明。例如，半点时间双精度变量不能包含为局部双精度变量

我想要双currentTitle=声明。半点时间，然后在ActionListener setText中设置currentTitle。产生的这个问题是，当程序运行时，它将当前标题设置为INIT值0，然后按下按钮时保持为0

private static void gethalfDotTime(JButton tapButton, JPanel contentPane) {
        final JLabel currentLabel = new JLabel("0ms");
        currentLabel.setBounds(119, 185, 120, 16);

    tapButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            currentLabel.setText(Declarations.threeDecimals.format(Declarations.halfDotTime) + "ms");
        }
    }); 
        commonFormatting(tapButton, contentPane, currentLabel);
    }

private static void gethalfTime(JButton tapButton, JPanel contentPane) {
        final JLabel currentLabel = new JLabel("0ms");
        currentLabel.setBounds(119, 185, 120, 16);

    tapButton.addActionListener(new ActionListener() {
        public void actionPerformed(ActionEvent e) {
            currentLabel.setText(Declarations.threeDecimals.format(Declarations.halfTime) + "ms");
        }
    }); 
        commonFormatting(contentPane, currentLabel);
    }

//MANY MORE SIMILAR METHODS ALL CALLING COMMON FORMATTING.



private static void commonFormatting(JPanel contentPane, final JLabel currentLabel) {

    currentLabel.setHorizontalAlignment(SwingConstants.RIGHT);
    currentLabel.setForeground(new Color(255, 255, 255));
    currentLabel.setFont(new Font("Letter Gothic Std", Font.BOLD, 14));
    contentPane.add(currentLabel);