Simple methots to calculate the Min or Max of a list of integers. The same logic can be applied for floats, double, longs, etc..

MathUtils.java

/**
     * Calculates the max of several integers at once.
     *
     * @param values
     *         2 or more integers to which the maximum should be calculated
     * @return The maximum value in the list
     */
    public static int max(@NonNull int... values) {
        if (values.length < 2) {
            throw new RuntimeException("At least 2 integers are needed in order to calculate the maximum value.");
        }
        int max = values[0];
        for (int i = 1; i < values.length; i++) {
            max = Math.max(max, values[i]);
        }
        return max;
    }

    /**
     * Calculates the min of several integers at once.
     *
     * @param values
     *         2 or more integers to which the minimum should be calculated
     * @return The minimum value in the list
     */
    public static int min(@NonNull int... values) {
        if (values.length < 2) {
            throw new RuntimeException("At least 2 integers are needed in order to calculate the minimum value");
        }
        
        int min = values[0];
        for (int i = 1; i < values.length; i++) {
            min = Math.min(min, values[i]);
        }
        return min;
    }