Why one of the reasons to say that a design is bad is about deployment???

Sorry, my english is very bad.

I'm studying a example about rectangles. I don´t have the source code.

The Rectangle class has two methods shown. One draws the rectangle on
the screen, the other computes the area of the rectangle. Two different
applications use the Rectangle class. One application does
computational geometry. It uses Rectangle to help it with the
mathematics of geometric shapes. It never draws the rectangle on the
screen. The other application is graphical in nature. It may also do
some computational geometry, but it definitely draws the rectangle on
the screen.

The author of the paper say that one of the problem is "we must include
the GUI
in the computational geometry application. If this were a C++
application, the GUI would
have to be linked in, consuming link time, compile time, and memory
footprint. In a Java
application, the .class files for the GUI have to be deployed to the
target platform."

I don't understand this problem?? what means deployment??

.

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