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What is this code doing

Hugh Harrison
Greenhorn

Joined: Mar 01, 2010
Posts: 3
I am studying a JSP book(JSP: Complete Reference by Hanna published by Osbourne) that includes sample code for a java class that one can use instead of a browser to display the server response to a request. The class name is WebClient. It has a main() method. It also has a constructor - public WebClient(String host, int port). The "main" method contains the following statement: new WebClient(host, port). Is this statement calling the constructor OR instantiating an inner class of the same name as the outer class OR what? If it is merely creating a new instance of the WebClient class, why would that be necessary? When one starts a java program with a mian method doesn't the constructor execute.

THANKS
Shinelin Samuel
Ranch Hand

Joined: Mar 01, 2010
Posts: 55
Hi,

Going with your statements, it would call the constructor WebClient(host, port) and creates a class instance. The constructor will be called only during instantiation of the class.

Regards,
Shinelin
David Newton
Author
Rancher

Joined: Sep 29, 2008
Posts: 12617

No, simply running main doesn't create an instance of the class it's in--main is a static method. If you want the main method to create an instance of the class you have to "new" it.

And welcome to JavaRanch!
 
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subject: What is this code doing