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Raihan Khan
2,168 PointsWhat is the purpose of using an object. I didn't understand or not clear.
Tower tower = new Tower(); Can someone explain in details what he mean by instantiation in class or the purpose of creating an object in Main. Can we do it with out, if not then why...
2 Answers
Ar33ss Leon
4,621 PointsIn few words an object is just like a class that will contain its atributes. For example, a Car is an object and its atributes could be: red, 170cm, 900kgs, 4 seats, nissan. In programming you could do this like:
Class car{ color: red height: 170 weight: 900kgs car_brand: nissan }
Steven Parker
229,644 PointsYou're taking the "Object-Oriented Programming" course. The whole point is to learn about how objects can be used to create coherent program structure. The answer to the question "Can we do it with out?" is yes, but a program written that way would have a very different structure.
Objects simplify working with multiple things of the same type. Each instance represents one of the things, but they all share the same definition that establishes fields, properties, and methods to enable what they do. The "Tower" object is a good example because you may have several of them in the game, but they all do the same thing and each will store the same kind of data and use the same methods.
And "instantiation" just means "making a new thing of this type", which explains why the operator to do it is called "new".
Raihan Khan
2,168 PointsI know i am taking oop course but what I want to know why we are using Tower tower = new Tower(); what is this line represent. I know i have to use object but why we are using this line in every class. For ex. in map class we are using Map map = new Map();... what is it doing...
Steven Parker
229,644 PointsThose lines create a new instance of the class, a new "Tower", or a new "Map". The class itself is simply a blueprint, instantiation is using the blueprint to build a thing based on it.