**Java programming language

Question 2:

(a) Complete the code hereafter using the strategy pattern to implement a StudentList class that allows sorting via the SortStrategy interface. (Keep it simple; do not write code other than needed to realize the strategy pattern.) Then add the code in the main() that will create a StudentList object from a given ArrayList aList, change its default sorting strategy, and sort its data. (4 marks)

public interface SortStrategy {

int sort( ArrayList list );

}

public class BSort implements SortStrategy {

public int sort( ArrayList list ) {

System.out.println("Using B-sort :"); /* */ }

}

public class ISort implements SortStrategy {

public int sort( ArrayList list ) { System.out.println("Using I-sort :"); /* */ }

}

public class StudentList {

private ArrayList listData; public StudentList ( ArrayList listData )

(b) Draw a UML class diagram showing the StudentList class and all the interfaces. Name the class relationship shown between the class and the interface, and give a simple usage scenario to justify it. (3 marks)