Question

Assume you call the method below with an array list that contains (2,3,4,5,1)  

public static void m3(ArrayList list1)

{

       if (list1.size() ==1)

  System.out.println(list1.get(0));

       else

              if (list1.size()%2==0)

    System.out.println(list1.remove(0));

              else

                  System.out.println(list1.remove(list1.size()-1));  

  

      

}

What will be the output?

Assume you call the method below with an array list that contains (2,3,4,5,1)  

public static void m3(ArrayList list1)

{

       if (list1.size() ==1)

  System.out.println(list1.get(0));

       else

              if (list1.size()%2==0)

    System.out.println(list1.remove(0));

              else

                  System.out.println(list1.remove(list1.size()-1));  

  

      

}

What will be the output?

Answer 1

Answer- 1 will be printed.

Explanation

(i) in this program we have a method m3 that take ArrayList as a argument .   

(ii) in the first if statement we check the size of our ArrayList that

  is 5 initially so if size will be equals to 1 then condition is true but now our case condition is false.

If(5==1)

So condition is false.

(iii) now condition is false so else block will be executed , and in the else block have a another if statement and we checked a condition that is if size of list is modulo by 2 is equals to 0 then our condition will be true  but here out condition it is failed. because modulus is 1.

If(5%2==0)-> it becomes

If(1==0) so condition is false

(iv) so now else block will be executed- in this else block we have a print statement and inside print statement we called remove method through object list1. and inside remove method we called list1.size() method that return size of list.so size of list is 5 and now we minus the size of list by 1

  so (5-1=4).

list.(remove(4));

  remove method remove the value of 4th index so in our case the value of 4th index is 1 so 1 will be our output.

Note:

Remove method is used to remove the element present at the specified position in the list.