Question

Exercise 4.b Answer the following questions for the method count () below: public static int count (List list, Object element) // Effects: if list or element is null throw NullPointerException // else if element is in the list, return the number of times element is in list; else return-1 / for example, search (13,3,1], 3) 2, search ((1,7,5], 2)--1 the all combinations coverage criterion. In your solution remember to include .List of all the input variables, including the state variables . Relevant characteristics and blocks that partition the characteristics .One block in each partition designated as the "Base" block (and motivation) . Values for each block

Answer 1

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import java.util.*;

public class CountElements{

public static void main(String[] args) {

List<Integer> list = new ArrayList<Integer>();

list.add(3);

list.add(3);

list.add(1);

System.out.println("Count is: "+count(list, 3));

List<Integer> list2 = new ArrayList<Integer>();

list2.add(1);

list2.add(7);

list2.add(5);

System.out.println("Count is: "+count(list2, 2));

}

public static int count(List<Integer> list, int search){

if(list==null)

throw new NullPointerException("List must not be empty");

else{

int count = 0;

for(Integer el: list){

if(el==search)

count++;

}

if(count==0)

return -1;

else

return count;

}

}

}