In Java define a class quizQuestion In this class define a m

In Java define a class quiz.Question. In this class define a method named answer. Define this method so that it returns a count of all the elements of its argument, an ArrayList, that have length 3. If the argument is null, return 0.

Solution

//save the below code as quiz.java

import java.util.ArrayList;

public class quiz {
public static void main(String args[])
{
ArrayList a=new ArrayList();
//passing the arraylist with no elements to the method answer
System.out.println(answer(a));
//adding elements to arraylist
a.add(\'a\');
a.add(\'b\');
a.add(\'c\');
//passing the arraylist with 3 elements to the method answer
System.out.println(answer(a));
}
static int answer(ArrayList a)
{
//size method returns 0 if ArayList is null(no elements) otherwise returns numberof elements
return a.size();   
}
}
/*Example output.
0
3
*/
//Comment if any clarification or if you want answer in any other method...
//thanks