What is the name of the method that returns the actual number of objects in a java.util.ArrayList? * degree O List O index O length size
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Java Question 17:
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- What is the output of the following Java code? ArrayList<String> names = new ArrayList<>(); names.add("James"); names.add("Mary"); names.add("Henry"); names.add("George"); names.add("Mary"); names.add("John"); names.add("Zachery"); Set names_wo_duplicate = new HashSet(names); Iterator set_val = names_wo_duplicate.iterator(); while(set_val.hasNext()) System.out.print(set_val.next() + ", "); Group of answer choices James, George, John, Zachery, Henry, Mary James, Mary, Henry, George, John, Zachery None of the above Code does not compile because of syntax errorsGiven an array with values 5, 10, 15, 20, 25, what are the fewest number of swaps needed to reverse the list? a. 2 b. 3 c. 4 d. 5 JAVAusing java, finish the two arrayList methods below: public int indexOf(Object o) { } public E remove(int index) { } and then create a class to test the ArrayList methods
- javaprogram that uses an array with ten random integers to prints four lines of output, containing all even elements, every element at a even index, elements in reverse order, only first and last element thank you!!We know that the first file name is stored at index zero in the ArrayList, and the list stores the file names as strings, so could we write the body of listAllFiles along the following lines? System.out.println(files.get(0)); System.out.println(files.get(1)); System.out.println(files.get(2)); etc. How many println statements would be required to complete the method?Please create a program in Java which will include a method that will merge sort an array of strings and not ints.
- I need to write a method in java. in this method i have a paragraph (string) field. the first thing i need to do is split this paragraghs to sentence as an array. Also i have piece field as a list<piece> and size field. The size of the sentences I get as an array should be specified and added to the list of piece. like index list. The method should be public void setPiecesSize.Provide a different implementation of ChoiceQuestion. Instead of storing the choices in an array list, the addChoice method should add the choice to the question text. For this purpose, an addLine method has been added to the Question class. Use the following files: Question.java /** A question with a text and an answer.*/public class Question{ private String text; private String answer; /** Constructs a question with empty text and empty answer. */ public Question() { text = ""; answer = ""; } /** Sets the answer for this question. @param correctResponse the answer */ public void setAnswer(String correctResponse) { answer = correctResponse; } /** Checks a given response for correctness. @param response the response to check @return true if the response was correct, false otherwise */ public boolean checkAnswer(String response) { return response.equals(answer); } /** Add a line of text to…In java Write a method public static ArrayList<Integer> append(ArrayList<Integer> a, ArrayList<Integer> b) that appends one array list after another. Ex: a = 1 2 3 4 5, b = 6 7 8 9 10 then append returns 1 2 3 4 5 6 7 8 9 10
- How do I read a sequence of values in a file into a arraylist in a method? It's in java progarmming.Write the following method that shuffles an ArrayList:public static <E> void shuffle(ArrayList<E> list)Write the following method that averages an ArrayList ofintegers:public static void average(ArrayList<Integer> list)