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Beginning of the class named Slick0110a

Consider the code fragment shown in Listing 3 . (This code was extracted from Listing 1 to make it easier to discuss.)

Listing 3 . Beginning of the class named Slick0110a.
public class Slick0110a implements Game{ public static void main(String[]args) throws SlickException{AppGameContainer app = new AppGameContainer(new Slick0110a());app.start();//this statement is required }//end main

Listing 3 shows the beginning of the class named Slick0110a along with the entire main method.

An object of the interface type Game

To begin with, note that the Slick0110a class implements the interface named Game . Therefore, an object of this class satisfies the requirement for the second type of object identified as item 2 in the above list . In other words, an object of this class is an object of the interface type Game .

An object of the AppGameContainer class

Now note the first statement in the main method in Listing 3 that instantiates a new object of the class named AppGameContainer and saves that object's reference in the local variable named app . This object satisfies the requirement for the first type of primary object identified as item 1 in the above list . In other words, an object of this class is an object of the type GameContainer because the class named AppGameContainer is a subclass of GameContainer .

Tying the two objects together

The class named AppGameContainer provides two overloaded constructors, each of which requires an incoming parameter that is a reference toan object instantiated from a class that implements the interface named Game . The code in the main method in Listing 3 uses the simpler of the two overloaded constructors to instantiate a new object of the class named AppGameContainer and to save its reference in the local variable named app .

The code in Listing 3 also instantiates a new object of the class named Slick0110a and passes that object's reference to the constructor for the class named AppGameContainer . This is legal because the class named Slick0110a implements the interface named Game .

At this point, the two objects described in the above list exist and occupy memory. From this point forward, the container object knows about the game object and has access to its members.

Start the game program running

Finally, the last statement in the main method calls the start method on the new container object to cause the program to be initialized and to cause the game loop to start running.

The Game interface

One of the rules in Java programming is that whenever a new class definition inherits an abstract method declaration, either the new class definition mustprovide a concrete definition for the abstract method or the class itself must be declared abstract.

All of the methods declared in an interface are implicitly abstract. Therefore, whenever a new class definition implements an interface that declaresmethods, it inherits one or more abstract method declarations and the above rule applies.

Questions & Answers

How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
How can I make nanorobot?
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
how can I make nanorobot?
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Anatomy of a game engine. OpenStax CNX. Feb 07, 2013 Download for free at https://legacy.cnx.org/content/col11489/1.13
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