Overriding code example
Example 1: what's method overriding
Overriding means same method name and same parameter,
occur in different class that has inheritance relationship.
we use method overriding to implement specific functionality to the method.
Example: get method
WebDriver driver = new ChromeDriver();
driver.get("URL") ==> opens the url from chrome
WebDriver driver = new FireFoxDriver();
driver.get("URL") ==> opens the url from Firefox
we can only override instance methods and method override
takes place in sub class.
instance method that we are going to override cannot be private and final
Example 2: overriding
Overriding means same method name and same parameter,
occur in different class that has
inheritance relationship.
we use method overriding to implement
specific functionality to the method.
Examples are get and navigate methods
of different drivers in Selenium .
Example: get method
WebDriver driver = new ChromeDriver();
driver.get("URL") ==> opens the url from chrome
WebDriver driver = new FireFoxDriver();
driver.get("URL") ==> opens the url from Firefox
we can only override instance methods and method override
takes place in sub class.
instance method that we are going to override cannot be private and final
Example: get method
WebDriver driver = new ChromeDriver();
driver.get("URL") ==> opens the url from chrome
WebDriver driver = new FireFoxDriver();
driver.get("URL") ==> opens the url from Firefox
we can only override instance methods and method override
takes place in sub class.
instance method that we are going to
override cannot be private and final
Example 3: overloading and overriding
Method Overloading
Method overloading is providing two separate methods in a class
with the same name but different arguments, while the method return type
may or may not be different, which allows us to reuse the same method name.
1) Method Overloading occurs with in the same
class
2) Since it involves with only one class inheritance
is not involved.
3)In overloading return type need not be the same
4) Parameters must be different when we do
overloading
5) Static polymorphism can be acheived using
method overloading
6) In overloading one method can’t hide the
another
Method Overriding
Overriding means same method name and same parameter,
occur in different class that has inheritance relationship.
we use method overriding to implement specific functionality to the method.
1) Method Overriding occurs between
two classes superclass and subclass
2) Since method overriding occurs between superclass
and subclass inheritance is involved.
3) In overriding return type must be same.
4) Parameters must be same.
5) Dynamic polymorphism can be acheived using
method overriding.
6) In overriding subclass method hides that of the
superclass method
Example 4: overloading
Method Overloading
Method overloading is providing two separate methods in a class
with the same name but different arguments, while the method return type
may or may not be different, which allows us to reuse the same method name.
1) Method Overloading occurs with in the same
class
2) Since it involves with only one class inheritance
is not involved.
3)In overloading return type need not be the same
4) Parameters must be different when we do
overloading
5) Static polymorphism can be acheived using
method overloading
6) In overloading one method can’t hide the
another
Example 5: method override
using method-override in your index.js
1. npm install method-override --save
2. var methodOverride = require("method-override");
3. app.use(methodOverride("_method"));
method override in your UPDATE route:
* <form action = "/campgrounds/<%=campground._id%>/edit?_method=PUT"
method = "POST">
and EDIT routes: