Analyze the following and select the right print result ArrayList arrstr=new ArrayList(); arrstr.add("Bashful"); arrstr.add("awful"); arrstr.add("jumpy"); arrstr.add("Happy"); arrstr.set(1, "hello"); arrstr.add(3, "hi"); arrstr.remove(2); System.out.println("the index of awful is " + arrstr.index0f("awful"));
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- Array Lists & Graphics: Create a project in Eclipse named Blinds. Include two classes: Rainbow and RainbowViewer. Using the colours in Table 1 in any order you want, create a 13 rows x 1 column arrangement of Rectangles (width = 500, height = 50) starting at x = 50, y = 50 with the BLACK square. Use an ArrayList to store the 13 rectangles that form the blinds. [Hint: While creating each rectangle, you can use a for loop. When ready, use the .fill method to paint them onto a JFrame (600x800) with title: “My ColourfulBlinds”.]Create an ArrayList of strings to store the names of celebrities or athletes. Add five names to the list. Process the list with a for loop and the get() method to display the names, one name per line. Pass the list to a void method. Inside the method, Insert another name at index 2 and remove the name at index 4. Use a foreach loop to display the arraylist again, all names on one line separated by asterisks. After the method call in main, create an iterator for the arraylist and use it to display the list one more time.Create an ArrayList of strings to store the names of celebrities or athletes. Add five names to the list. Process the list with a for loop and the get() method to display the names, one name per line. Pass the list to a void method. Inside the method, Insert another name at index 2 and remove the name at index 4. Use a foreach loop to display the arraylist again, all names on one line separated by asterisks. After the method call in main, create an iterator for the arraylist and use it to display the list one more time. See Sample Output. SAMPLE OUTPUT Here is the list Lionel Messi Drake Adele Dwayne Johnson Beyonce Here is the new list * Lionel Messi * Drake * Taylor Swift * Adele * Beyonce Using an iterator, here is the list Lionel Messi Drake Taylor Swift Adele Beyonce Textbook: Introduction to Java Programming and Data Structures, Comprehensive Version, Edition: 11th Author: Y. Daniel Liang Publisher: Pearson ISBN: 9780134670942
- 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…Arrays: create an array of a given type and populate its values. Use of for loop to traverse through an array to do the following : to print the elements one by one, to search the array for a given value. ArrayList: create an ArrayList containing elements of a given type . Use some of the common ArrayList methods to manipulate contents of the ArrayList. Write methods that will take an ArrayList as its parameter/argument ; and/or return an ArrayList reference variable as its return type. Searching for an object in an Array: Loop through the ArrayList to extract each object and to check if this object’s attribute has a given value. Explain how and why interfaces are used in Java Collection Framework. Explain the major differences between a Stack and a Queue. Be able to use stack and queue methods. What is meant by O(N) notation? Express the complexity of a given code using the O(N) notation.Lab. Exam Q3) Create an M-by-N array of any numbers. Move through the array, element by element, and set any value that is less than 0.2 to 0 and any value that is greater than (or equal to) 0.2 to 1.
- GetMonth - This method prompts for and returns the month GetNumMurals - This method prompts for and returns the number of murals scheduled and is called twice -- once for interior murals and once for exterior murals ComputeRevenue - This method accepts the number of interior and exterior murals scheduled, accepts the month they are scheduled, displays the interior and exterior prices, and then returns the total expected revenue DataEntry - This method fills an array with customer names and mural codes and is called twice -- once to fill the array of interior murals and once to fill the array of exterior murals GetSelectedMurals - This method continuously prompts for mural codes and displays jobs of the corresponding type until a sentinel value is entered. In order to prepend the $ to currency values, the program will need to use the CultureInfo.GetCultureInfo method. in C#Increasing the length property value adds extra items to an array, but the elements are null until they are declared. Is it true or falseArrayList<Integer> list = new ArrayList<Integer>(25); What is the type of the ArrayList defined in question number?
- Is it true or false? The final element's subscript is always one less than the array's Length attribute.Create 2D array 4 *5. Ask the user to enter the number inside the array. Print the numbers organized by rows. Calculate the average for each row. Print the least average. Finally, create a method that receives a 2D array to print its elements reverse starting from the last element.Determine if the following statement are true or false Screen shot shows the text's arraycollection When comparing two objects using the == operator, what is actually compared is the contents of the objects. The equals method of the Object class returns true only if the two objects being compared have identical attributes. A collection allows retrieval of information based on the size of the information. With the text's array-based collection implementation, the set of stored elements is scattered about the array.