Python

Instance Methods: The most common method type. Able to access data and properties unique to each instance.

Static Methods: Cannot access anything else in the class. Totally self-contained code.

Class Methods: Can access limited methods in the class. Can modify class specific details.

class Vehicle(object):
    """Document String: Define a Vehicle class"""
 
    count = 0; # static variable

    def info():
        return Vehicle.count;

    info = staticmethod(info) # static function

    def __init__(self, brand, year):
        self._brand = brand;
	self._year = year;
        Vehicle.count += 1;
 
    def __str__(self):
        return self._brand+' '+str(self._year)

    def __del__(self):
        Vehicle.count -= 1;

def main():
    vehicles = [Vehicle("Buick", 1998), Vehicle("Lincoln", 1999)]

    print(Vehicle.info())
    print(vehicles[1].info())

if __name__ == '__main__':
    main()

class Vehicle(object):
    """Document String: Define a Vehicle class"""
 
    count = 0;

    @staticmethod
    def info():
        return Vehicle.count;

    @classmethod
    def cla(cls):
        print('Call class method ...')
        print(Vehicle.info()) # class methods can call static methods

    def __init__(self, brand, year):
        self._brand = brand;
	self._year = year;
        Vehicle.count += 1;
 
    def __str__(self):
        return self._brand+' '+str(self._year)

    def __del__(self):
        Vehicle.count -= 1;

def main():
    vehicles = [Vehicle("Buick", 1998), Vehicle("Lincoln", 1999)]

    print(Vehicle.info()) # call static method
    print(vehicles[1].info())

    Vehicle.cla() # call class method

if __name__ == '__main__':
    main()