Method isNumber

java/org/apache/el/lang/ELArithmetic.java:440–442

Check if the given object is a number. @param obj The object to check @return true if the object is a number

(final Object obj)

     * @return true if the object is a number
     */
    public static boolean isNumber(final Object obj) {
        return (obj != null && isNumberType(obj.getClass()));
    }

    /**
     * Check if the given class is a number type.