EECS2030: LAB 8 Due: Apr 3th, XXXXXXXXXX:59 pm
The purpose of this lab is to practice working with Generics as well as practice
comprehending Junit test cases.
1. Setup
Please download Lab8.zip that is attached to this description.
• Open eclipse.
• Click on File and select Import.
• Choose Existing Projects into Workspace and click Next.
• Click on Select Archive File and then Browse. Find Lab8.zip and
click Finish.
• Please make sure that you do not already have a project called
EECS2030_Lab8, otherwise, eclipse cannot import it for you.
You should see two files, one is called Utility.java and one
UtilityTester.java.
2. Programming Task
For this lab, we are asking you to create a parameterized class called Utility
and decide on its methods’ signature.
Class Utility is a class that contains 4 methods. The implementation of the
methods is given below. The only thing that you need to do is to decide on
the co
ect method signature so that all the test cases are passed.
• linearSearch is a method that linearly searches for the given item (i.e.
the input parameter) in list. The list is the instance variable of class
Utility. You should decide on what is the co
ect method signature
when the implementation looks like below:
int position = -1;
for (int i = 0; i
if (item.compareTo(list.get(i)) == 0) {
position = i;
eak;
}
}
return position;
• mergeList is a method that gets a List of ‘some type’ as its input
parameter and add all the items that exist in the instance variable to
the end of the list. The code that you need to use as the
implementation of this method is as follow:
for (T obj: this.list)
list.add(obj);
• containList is a method that gets a list of ‘some type’. If the instance
variable of this class contains all the elements of the input list, it adds
all the elements of the input to the instance variable and returns true.
The body of this method looks like below:
if (this.list.containsAll(list)) {
this.list = new A
ayList
();
for (T obj: list)
this.list.add(obj);
return true;
}
else
return false;
• removeZero is a method that does not work on the instance variable of
this class. It gets a list and removes all the zeros from the list. Here is
the implementation of the method:
for (int i = 0; i < myList.size(); i++) {
if (MyInteger.isZero(myList.get(i))) {
myList.remove(i);
i--;
}
}
In addition to the above methods, you should implement the constructors of
the class in a way that does not fail the test cases.
A few other classes can be found in Utility.java that are used for testing
the co
ectness of your code. These classes are called Point, MyInteger,
NaturalNumber, OddNumber and EvenNumber.
For this lab, we do not provide any javaDoc on purpose, because the
implementation of the methods are given. Besides, we don’t want to give any
hint on the signature of the methods.
3. Submit
You only submit one file that is called Utility.java via eClass by clicking
on the lab link. Although you are encouraged to write the javaDoc, you do
not need to submit the HTML files.