Question

JAVA

Create an ArrayList called list of type Character 2. Add the following five elements | < \ / > (4 points) 3. Print the elements of the list, with a label (3 points) 4. Delete the last element of the list (4 points) 5. Use the method size to determine how many elements there are in the list (no hard-coded numbers). Print the number of elements. (3 points) 6. Add a plus sign ( + ) to the list (4 points) 7. Add a dash ( - ) right after the first element (4 points) 8. Print the updated list (3 points) Important: Make sure that the code still works when I initialize the ArrayList with a different number of elements. Output: list: [|, <, \, /, >] number of elements in list: 4 list: [|, -, <, \, /, +]

Answer 1

Output

Code with comments

import java.util.ArrayList;

public class ArrayListJava{

   public static void main(String[] args) {

       ArrayList<Character>list=new ArrayList<>();   //1) creating new list

       list.add('|');       //2)   add character to list

       list.add('<');

       list.add('\\');      // '\' is invalid symbol

       list.add('/');

       list.add('>');

       System.out.print("List: [ ");        //3)   print list

       for (int i=0;i<list.size();i++) {

            System.out.print(list.get(i));

            if(i!=list.size()-1)

               System.out.print(",");   //dont print comma after last element

       }

       System.out.println(" ]");

       list.remove(list.size()-1);      //4)remove last element

       System.out.println("number of elements in list: "+list.size());      //5) size of list

       list.add('+');   //6) add character

       list.add(1, '-');    //7) add character at position 1

       System.out.print("List: [ ");    //8) print list

       for (int i=0;i<list.size();i++) {

            System.out.print(list.get(i));

            if(i!=list.size()-1)

               System.out.print(",");

       }

       System.out.println(" ]");

       

   }

}

For indentation Purpose

Answer 2