Pierre Guilbert - 8 months ago 21

Java Question

We have n variables

`X = {x1,x2,...xn}`

In python for example I can do that:

`if (x1 == x2 == x3 == xn):`

In java I must do:

`if((x1 == x2) && (x2 == x3) && (x3 == xn)):`

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

Thanks.

Answer

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.

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;
}
```

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;
}
```

In either case, use with:

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