Commons Lang、NumberUtils.max()

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

public class C2008122800 {
    public static void main(String[] args) {
        int[]    aryi = {3, 1, 2};
        double[] aryd = {1.3, 1.1, 1.2};

        System.out.println(NumberUtils.max(1, 2, 3));
        System.out.println(NumberUtils.max(3, 1, 2));
        System.out.println(NumberUtils.max(aryi));

        System.out.println(NumberUtils.max(1.3, 1.1, 1.2));
        System.out.println(NumberUtils.max(aryd));
    }
}

で、

3
3
3
1.3
1.3