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ECET 370 Week 2 Lab 2 .pdf


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ECET 370 Week 2 Lab 2

General Instructions
Exercises 1, 2, and 3 use the programs in DocSharinglabeled “User-defined array list."
Exercise 4 uses the programs in DocSharinglabeled “Using java.util.ArrayList."
Exercise 1: Review of array-based lists Create a project using the classes in the DocSharing
area labeled “User-defined array list." Compile it, run it, and review the code that is given
carefully. This code tests the ArrayList class provided in the lecture.
Exercise 2: A user-defined array list Modify the class ArrayList given in the lecture by adding
to it the functions listed below for Exercise 2. In each case, the appropriate error message
should be generated if an invalid condition occurs. For example, an error message should be
generated when trying to insert an item in a given location in the list and the location is out
of range. a. ArrayList(int size): create a constructor that sets the size of the array list to the
value passed in size (note that the class variable SIZE cannot be final anymore). b. int length():
create this function to determine the number of items in the list (accessor function). c.
intgetSize(): create this function to determine the size of the list (accessor function). d. void
clear(): create this function to remove all of the items from the list. After this operation, the
length of the list is zero. e. void replace(int location, int item): create this function to replace
the item in the list at the position specified by location. The item should be replaced with
item. f. void insert(int location, int item): create this function to add an item to the list at the
position specified by location. g. void remove(int item): create this function to delete an item
from the list. All occurrences of item in the list should be removed. h. int get(int location):
create a function that returns the element at location. i. public ArrayList copy(): create a
function that makes a deep copy to another ArrayList object.
Exercise 3: Using an array-based list Using the class ArrayList completed in the previous
exercise, write a program that uses it to store 100 random numbers. Consider that each of
these random numbers is an integer in the interval [0, 200]. Write the program in such a way
that there are no number duplicates.
Exercise 4: Review of the library class java.util.ArrayList Create a project using the classes in
the DocSharing area labeled “Using java.util.ArrayList." Compile it, run it, and review the

code that is given carefully. This code is the complete program given in our lecture that tests
the library class java.util.ArrayList.
Exercise 5: Using the library class java.util.ArrayList Rewrite Exercise 3 (above) using the class
java.util.ArrayList to store the 100 random numbers.

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