我应该何时将方法拆分为更多方法？

Question

我有两种类似的方法来设置矩形的尺寸。起初，我将它们组合成一个设置宽度和长度的较长方法。我读到了保持代码模块化，一次执行一项任务。所以将它分成两种方法。另外，我有单独的方法来显示消息。我是否会将方法分解为较小的方法？

    private void userInputWidth() {
    Scanner reader = new Scanner(System.in);
    double loopCondition = 0;
    while (loopCondition <= 0) {
        displayEnterWidth();
        double nextDouble = reader.nextDouble();
        loopCondition = nextDouble;
        if (nextDouble <= 0) {
            displayErrorMessage();
        } else {
            this.rectangleWidth = nextDouble;
            break;
        }
    }
}

private void displayEnterWidth() {
    System.out.println("Please enter the width of the rectangle ");
}

第二种方法

private void userInputLength() {
    Scanner reader = new Scanner(System.in);
    double loopCondition = 0;
    while (loopCondition <= 0) {
        displayEnterLength();
        double nextDouble = reader.nextDouble();
        loopCondition = nextDouble;
        if (nextDouble <= 0) {
            displayErrorMessage();
        } else {
            this.rectangleLength = nextDouble;
            break;
        }
    }
}

private void displayEnterLength() {
    System.out.println("Please enter the length of the rectangle");
}