Commons Lang、IntRange#equals

import org.apache.commons.lang.math.IntRange;

public class C2009053000 {
    public static void main(String[] args) {
        System.out.println(new IntRange(1, 3).equals(new IntRange(1, 3)));
        System.out.println(new IntRange(1, 3).equals(new IntRange(1, 2)));
        System.out.println(new IntRange(1, 3).equals(1));
    }
}

で、

true
false
false