如何在java中按下按钮时只运行一次？

boolean isButtonClicked = false;

button.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        if (!isButtonClicked) {
            // 执行操作
            isButtonClicked = true;
        }
    }
});

int clickCount = 0;

button.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        clickCount++;
        if (clickCount == 1) {
            // 执行操作
        }
    }
});

enum ButtonState {
    NOT_CLICKED, CLICKED
}

ButtonState buttonState = ButtonState.NOT_CLICKED;

button.addActionListener(new ActionListener() {
    public void actionPerformed(ActionEvent e) {
        if (buttonState == ButtonState.NOT_CLICKED) {
            // 执行操作
            buttonState = ButtonState.CLICKED;
        }
    }
});