Range(min, max, value) function in Java

Question

Sometimes we write unnecessary code. My question is pretty simple: is there a method like the following?

/** @return true if a given value is inside the range. */
public static boolean range(min, max, value)

I didn't find it on Google. Is that because it doesn't exist?

Answer 1

You could create a typed Range class that has a within method:

public class Range<T extends Comparable<T>> {

    private final T min;
    private final T max;

    public Range( T min, T max ) {
        this.min = min;
        this.max = max;
    }

    public boolean within( T value ) {
        return min.compareTo(value) <= 0 && max.compareTo(value) >= 0;
    }
}

If min and max were the same for a group of tests, you could reuse your range object for all tests.

FWIW, this seems kinda handy!

Answer 2

Apache Commons Lang has a number of Range implementations, including NumberRange .

Commons Lang 3 has a generic implementation .

Answer 3

um...

value >= min && value <= max

surely if you really need a function for that you can easily write it yourself?

Answer 4

It doesn't exist.

A 'sensible' place for it would be in the Math module, but since it's quite simply expressed in the expression

min < value && value < max

it seems a little excessive.

Answer 5

public static boolean withinRange(min, max, value){
    return (value >= min && value <= max);
}