Agnieszka Jastrzebska, PhD
Programming 3
Laboratory no. 2
group 3, at 12:15 – 13:45
The task for today is to make a class named “Worm” with the following two fields:
 1-dimensional integer array named “parts”,
 2-dimensional character array named “body”
Each time when a new object of class “Worm” is created, constructor has to perform the
following actions:
 constructor initializes “parts” array. Implement a constructor, which takes as an
argument a 1-dimensional integer array that will be used to initialize field
“parts”.
 constructor initializes 2-dimensional array “body” with character ‘x’. The number
of characters ‘x’ to be used is taken from array “parts.” For example if “parts” is
{1,2,3,2,1} then “body” is {{‘x’},{‘x’,’x’},{‘x’,’x’,’x’},{‘x’,’x’},{‘x’}}. If “parts” is {1,1,2}
then “body” is {{‘x’},{‘x’},{‘x’,’x’}}.
Implement a toString method that will automatically print us out an object of class
“Worm” in a specific manner. An object of class “Worm” initialized using {1,2,3,2,1}
when printed out on the console will look as follows:
(x)-(xx)-(xxx)-(xx)-(x)=(oo)
In class “Worm” implement a method called “reshape” that takes as an argument a
positive integer, let us call this argument "units". “units” says how many body parts
should be attached to this worm. If “units” equals 0 or less, worm remains the same.
Length of attached elements has to be drawn randomly from [1,10] interval. For
example, if “units” is 3 and currently the worm looks as follows:
(x)-(xx)-(xxx)-(xx)-(x)=(oo) when the method is done this worm could look as follows:
(xxx)-(xxxx)-(x)-(x)-(xx)-(xxx)-(xx)-(x)=(oo)
Method executes the following actions:
 extend “parts” array by “units” elements, particular values are drawn randomly
 corrects array “body” by adding new elements
In the main method create a few worms and print them out on the console. Execute
method “reshape” for some worms and print them out on the console.
Grading:
 class structure – 1 pts
 constructors – 3 pts
 toString – 2 pts
 reshape – 2 pts
 main – 2 pts
 Your solution has to be sent via official university email account to my address by
the end of the labs. Solutions sent after the deadline will not be graded.
 Your program must compile. Programs that cannot be successfully compiled will
get 0 pts.
 The code must be commented.