Unit 3

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Exercises 

  1. Modify the StudentRecordManager class provided for Unit 1 project to take advantage of composition design.   For grading purposes, use the StudentRecordManager.java file provided to you, not the one with your own work. Do not fill in #ADD portions.
    You still need other provided files for this project i.e. Student class and the data folder.
    After modification, the StudentRecordManager class should look like this (red means private):
    StudentRecordManager class recList : ArrayList<Student> (private) StudentRecordManager(String) Size() : int displayRecords() : void loadFromFile(String) : ArrayList <Student> (private)” src=”https://canvas.park.edu/courses/52080/files/6697486/download?wrap=1″ /></p> <ul> <li>recList is a private instance data member now;</li> <li>The constructor should just initialize recList with loadFromFile() result;</li> <li>displayRecords() is a public instance method (not private, not static) now and doesn’t take any parameters as the data it needs is in instance data member recList;</li> <li>size() should just report # of records as now users of this class don’t have access to the arraylist.</li> <li>Do not touch loadFromFile().<br /> Put this main() directly in StudentRecordManager class. This project should compile and work the same as before (the given project portion in Unit 1). Include a screenshot of your program output in assignment report.<br />   public static void main(String[] args)<br />   {<br />     // path and file name of data file<br />    String fileName = “data/cs219.txt”;</p> <p>    StudentRecordManager roster = new StudentRecordManager(fileName);</p> <p>    roster.displayRecords();  // display data in table format</p> <p>    // simple statistics<br />     System.out.println(“Number of students: ” + roster.size());<br />  } // end main</li> </ul> </li> </ol> <div class=
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