是否有干净的语法来检查多个变量是否都具有相同的值？

问题描述：

我们有n个变量 X = {x1，x2，... xn} 它们不属于任何结构。

We have n variables X = {x1,x2,...xn} they are not in any structures whatsoever.

在python中我可以这样做： if（x1 == x2 == x3 == xn）：

In python for example I can do that: if (x1 == x2 == x3 == xn):

在java中我必须这样做： if（（x1 == x2）&&（x2 == x3）&&（x3 == xn））：

In java I must do: if((x1 == x2) && (x2 == x3) && (x3 == xn)):

您是否知道改进此语法的简单方法？（想象一下很长的变量名和很多）

Do you know a simple way to improve this syntax? (Imagine very long variable name and lot of them)

谢谢。

答

如果你有很多这些变量，你是否考虑将它们放在一个集合中而不是将它们作为单独的变量？此时有各种选项。

If you have lots of these variables, have you considered putting them in a collection instead of having them as separate variables? There are various options at that point.

如果你发现自己做了很多，你可能想要编写辅助方法，可能使用varargs语法。例如：

If you find yourself doing this a lot, you might want to write helper methods, possibly using varargs syntax. For example:

public static boolean areAllEqual(int... values)
{
    if (values.length == 0)
    {
        return true; // Alternative below
    }
    int checkValue = values[0];
    for (int i = 1; i < values.length; i++)
    {
        if (values[i] != checkValue)
        {
            return false;
        }
    }
    return true;
}

glowcoder提供的替代方案是强制至少有一个值：

An alternative as presented by glowcoder is to force there to be at least one value:

public static boolean areAllEqual(int checkValue, int... otherValues)
{
    for (int value : otherValues)
    {
        if (value != checkValue)
        {
            return false;
        }
    }
    return true;
}

在任何一种情况下，请使用：

In either case, use with:

if (HelperClass.areAllEqual(x1, x2, x3, x4, x5))
{
    ...
}

是否有干净的语法来检查多个变量是否都具有相同的值？

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