Copy the number of manufacturer.

Hey guys, I just came back of holiday to another semester, now enter II programming with java. Summer warms up then good, but I found myself with a major and no amount of research in my book, or internet doesn't seem to answer my question about copy constructors

Here's what the assignment tells me to do it for a certain class (the class containing the methods)

It has a copy constructor to make a good copy of the values of another object of RoomDimension.

That's what I created as a copy constructor in the class of my method.
     public RoomDimension(RoomDimension aRoom)
     {
          roomLength = aRoom.roomLength;
          roomWidth = aRoom.roomWidth;
          roomHeight = aRoom.roomHeight;
     }
This as far as I'm concerned seems fair. Problem is that I have no idea how to call it or use the copy constructor in my main class.

I can easily call and assign values to my first constructor as follows.
     double doubleLength = 3;
     double doubleWidth = 3;
     double doubleHeight = 3;
     String lengthString = "3";
     String widthString = "3";
     String heightString = "3";
     
     RoomDimension roomDigit = new RoomDimension(doubleLength, doubleWidth, doubleHeight);
     
     
     System.out.print("Area from double's: " + roomDigit.getArea());
the getArea() method obviously only has the length * width. Despite everything I have once I have create all the necessary methods to test in a class of dump demo to show the teacher each of the
methods work correctly. This is because at the end of the assignment together we will use all methods, point showing in object-oriented programming, it is important to make several methods that we would not need them.

In all cases, with the copy constructor is, how the hell can I call or even use it? Post the copy or do something with it in my main class. I'm so confuseeed Oo, nothing seems to work.

Thanks in advance I appreciate the help after that my brain began to melt to overreading the manual and the internet.

Basshunter36 wrote:

Despite everything I have once I have create all the necessary methods to test in a class of dump demo to show the teacher each of the
methods work correctly. This is because at the end of the assignment together we will use all methods, point showing in object-oriented programming, it is important to make several methods that we would not need them.

Who told you that 'in object oriented programming it is important to make several methods, although we might not need them? " That seems suspicious to me. It depends on what is the purpose of your Java class. But, if you create a Java class for your own internal use, it seems you need to create only the methods you need right now. You can always add it later.

In all cases, with the copy constructor is, how the hell can I call or even use it? Post the copy or do something with it in my main class. I'm so confuseeed Oo, nothing seems to work.

You must pass an existing RoomDimension to your copy constructor.

RoomDimension newRoom = new RoomDimension(roomDigit);
RoomDimension anotherRoom = new RoomDimension(new RoomDimension(1, 2, 3));

I don't know why you define these string values 3. You will never use them.

Tags: Java

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