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class rectangle

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sam1

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class rectangle

Jun 21st, 2005

hi every one

i am doing this coursework where i have to design two class one is:

Point2D, that models a two-dimensional point.

The second class implement a class Oblong(rectangle) from a given specification and will require the use of the Point2D class. 1. A Oblong specifies an area in two-dimensional (2D) space which is enclosed by the Oblong object's location, (i.e. its top-left corner ( x, y ) in the 2D-space), its width and its height.

i have no problem with point2d, but in oblong(rectangle) there is two methods(setlocation and getLocation) where set location modifies the co-ordinates of a rectangle’s top-left corner and getlocation the position of the rectangle’s top-left corner.

i can seem to come around those two methods, i tried everything but could not solve it.

i appreciate any one giving me help.
thanks :-| :-|

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sam1

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Re: class rectangle

Jun 21st, 2005

anyone??

please it is important!!!!!!!!!!!!!!!!!!!!

any help i can get would be nice...

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sam1

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Re: class rectangle

Jun 22nd, 2005

server_crash;

can you help please?

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Re: class rectangle

Jun 22nd, 2005

What exactly are you having problems with during the use of get and setLocation()... You can specify an x and y int as arguments or pass a point to it. You'll have to be more specific before I can really help.

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sam1

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Re: class rectangle

Jun 22nd, 2005

for the set method ive got x and y for parameters. the problem ive got is with get method. how can i return x and y in the same get method?
thnx

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Re: class rectangle

Jun 22nd, 2005

Im pretty sure that the get method returns a point....From there it's up to the recipitent of the point to call the getX() getY() methods on that point. There's really now way to return both of those. You can create your own methods that could do something like this:

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
 
public Point2D getLocation()
{
   return Point2D();
}
 
public int getX()
{
      Point2D p = getLocation();
      return p.getX();
}
public int getY()
{
    Point2D p = getLocation();
    return p.getY();
}
public Point2D getLocation()
{
   return Point2D();
}

public int getX()
{
      Point2D p = getLocation();
      return p.getX();
}
public int getY()
{
    Point2D p = getLocation();
    return p.getY();
}

You'll have to check to make sure I'm right about getX() and getY()...I'm pretty sure that those exist, but make sure.

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sam1

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Re: class rectangle

Jun 22nd, 2005

hi server_crash

i did it the way you told me but did not work.... i am puzzled as well

the task says:

provide an accessor getlocation() that retrieves the position of the rectangle's top left corner.

for the mutator setlocation() i have done this:

//mutator method
public void setLocation(int xLeft, int yLeft)
{
super.x = xLeft;
super.y= yLeft;
}

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Re: class rectangle

Jun 22nd, 2005

GetLocation() probably needs to make a call to the Point2D class. I'm guessing your class has a constructor that takes two arguments, an x and a y. If so, you could say:

 Help with Code Tags 
 Java Syntax (Toggle Plain Text) 
public void getLocation()
{
     return  new Point2D(this.x,this.y);
}
public void getLocation()
{
     return  new Point2D(this.x,this.y);
}

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sam1

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Re: class rectangle

Jun 23rd, 2005

thanx man this worked!!! :p :p :p

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S.T

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RE: hi i'm tring to do this point 2d and oblong class

#10

Jul 7th, 2005

Hi,

I am trying to do this point 2d and oblong class aswell, but i am having some trouble with the oblong class which has some of the fucntions like:

Provide a Boolean method isEmpty

Provide a Boolean method intersects

Provide a method shrink( int a, int b ) which takes a rectangle and returns a rectangle with the same top-left vertex but whose width and height are reduced by amounts a, b respectively

Provide an appropriate operation, union, that returns the smallest rectangle that contains both this rectangle and the specified rectangle

Provide an appropriate operation, intersection that returns the largest rectangle contained in both the specified rectangle and this rectangle; the method should return an empty rectangle if the two rectangles do not intersect

Provide any additional member methods that are appropriate for your class, including overloaded versions of existing methods, where meaningful.

if any body can help me i would be much appreciated as i am completly stuck with this part

Thank
S.T