Which of the following method is used to get the position of a particular element in an ArrayList? indexOf() read() get() contains()
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- Which accesses the number of elements in groceryList? ArrayList <String> groceryList;groceryList = new ArrayList<String>(); A. groceryList.size B. groceryList.length C. groceryList.length( ) D. groceryList.size( )Which of the following statements about the ArrayList class is/are false?Which element is stored at index 1 after the following sequence? ArrayList<String>groceryList;groceryList=newArrayList<String>();groceryList.add("Bread");groceryList.add("Apples");groceryList.add("Grape Jelly");groceryList.add(1,"Peanut Butter");groceryList.set(1,"Frozen Pizza");groceryList.remove(1); Bread Peanut Butter Apples Frozen Pizza For the given code, when is numType.setText() called? publicclassOddEvenextendsJFrameimplementsChangeListener{privateJSpinnernumSpinner;privateJTextFieldnumType;...numSpinner.addChangeListener(this);...@OverridepublicvoidstateChanged(ChangeEventevent){IntegernumValue;numValue=(Integer)numSpinner.getValue();if(numValue%2==0){numType.setText("Even");}else{numType.setText("Odd");}}...} Every time numSpinner's value changes Only the first time numSpinner's value changes Every time numSpinner's…
- Write a program that do the following: Ask the user to input his/her first name and store it in a String variable. Create an ArrayList with the type String. Each letter of the inputted name should be stored in a separate element of the ArrayList. Print the ArrayListsThe next five questions refer to the following String elements: ["It", "was", "a", "stormy", "night"] Write the code to declare an ArrayList containing these elements. What is the size of the list? What is its type?Write a program that deletes the first element in an array which matches a search key. Advance thanks <3
- Assume ArrayList productList contains 10,000 items. Which operation is performed fastest? Group of answer choices productList.remove(999) productList.remove(0) productList.add(0, item) productList.add(item)Question 4: Task 1: Create a generic method named sum() that accepts a generic ArrayList reference and returns the sum of the elements in the ArrayList argument. The generic type is bound to the Number class. The method will throw a NullPointerException is the input argument is null. public static ______________________sum(____________________) { } Task 2: i) Create an ArrayList of 100 random integers taking values between 0 and 1000. ii) Use the sum() method to find the sum in the integer ArrayList. iii) Create an ArrayList of 200 random real numbers taking values between -50.0 and +50.0. iv) Use the sum() method to find the sum in the ArrayList of real numbers. public static void main(String[] args){ } Task 3: Create a recursive method named dec2bin() that takes an integer argument (in decimal format) and returns the binary representation of the input argument as a String. Make sure that the input argument is not negative! public static String…What is printed as a result of executing the following code segment? List list1 = new ArrayList(); list1.add(new Integer(1)); list1.add(new Integer(2)); list1.add(new Integer(3)); list1.set(2, new Integer(4)); list1.add(2, new Integer(5)); list1.add(new Integer(6)); System.out.println(list1); [1, 5, 2, 4, 6] [1, 2, 4, 5, 6] [1, 2, 3, 4, 5] [1, 2, 5, 4, 6]
- List<Map.Entry<String, Integer>> list = new ArrayList<>(countWords.entrySet()); list.sort((one, another) -> - one.getValue().compareTo(another.getValue())); Can you explain to me what those two lines of code do?Write a program that do the following: Ask the user to input his/her first name and store it in a String variable. Create an ArrayList with the type String. Each letter of the inputted name should be stored in a separate element of the ArrayList. Print the ArrayLists. Note: Your answer should have the code as text, as well as a screenshot of the code with the output. The inputted name should be your first name. Name : Rababjava Write a program to do the following: Create an ArrayList of Student. Add 7 elements to the ArrayList. Use for each loop to print all the elements of an ArrayList. Remove an element from an ArrayList using the index number. Remove the element from an ArrayList using the content (element name).