Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Expert Solution & Answer
Chapter 20.8, Problem 20.8.2CP
Explanation of Solution
The following modification of the code is to remove the ball when “-”button is clicked.
//Define the method subtract()
public void subtract() {
//Check whether the list is greater than 0
if (list.size() > 0)
// Remove the last ball
list.remove(list.size() - 1);
}
Explanation:
- The “MultipleBallApp...
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
3. 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 avoid 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
Could you please rewrite the code without the map function? If possible please replace it with for loops or sets/dictionaries. Thanks a lot.
What happens when you try to look up a value and the key does not exist in the map?
Chapter 20 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 20.2 - Prob. 20.2.1CPCh. 20.2 - Prob. 20.2.2CPCh. 20.2 - Prob. 20.2.3CPCh. 20.2 - Prob. 20.2.4CPCh. 20.2 - Prob. 20.2.5CPCh. 20.3 - Prob. 20.3.1CPCh. 20.3 - Prob. 20.3.2CPCh. 20.3 - Prob. 20.3.3CPCh. 20.3 - Prob. 20.3.4CPCh. 20.4 - Prob. 20.4.1CP
Ch. 20.4 - Prob. 20.4.2CPCh. 20.5 - Prob. 20.5.1CPCh. 20.5 - Suppose list1 is a list that contains the strings...Ch. 20.5 - Prob. 20.5.3CPCh. 20.5 - Prob. 20.5.4CPCh. 20.5 - Prob. 20.5.5CPCh. 20.6 - Prob. 20.6.1CPCh. 20.6 - Prob. 20.6.2CPCh. 20.6 - Write a lambda expression to create a comparator...Ch. 20.6 - Prob. 20.6.4CPCh. 20.6 - Write a statement that sorts an array of Point2D...Ch. 20.6 - Write a statement that sorts an ArrayList of...Ch. 20.6 - Write a statement that sorts a two-dimensional...Ch. 20.6 - Write a statement that sorts a two-dimensional...Ch. 20.7 - Are all the methods in the Collections class...Ch. 20.7 - Prob. 20.7.2CPCh. 20.7 - Show the output of the following code: import...Ch. 20.7 - Prob. 20.7.4CPCh. 20.7 - Prob. 20.7.5CPCh. 20.7 - Prob. 20.7.6CPCh. 20.8 - Prob. 20.8.1CPCh. 20.8 - Prob. 20.8.2CPCh. 20.8 - Prob. 20.8.3CPCh. 20.9 - How do you create an instance of Vector? How do...Ch. 20.9 - How do you create an instance of Stack? How do you...Ch. 20.9 - Prob. 20.9.3CPCh. 20.10 - Prob. 20.10.1CPCh. 20.10 - Prob. 20.10.2CPCh. 20.10 - Prob. 20.10.3CPCh. 20.11 - Can the EvaluateExpression program evaluate the...Ch. 20.11 - Prob. 20.11.2CPCh. 20.11 - If you enter an expression "4 + 5 5 5", the...Ch. 20 - (Display words in ascending alphabetical order)...Ch. 20 - (Store numbers in a linked list) Write a program...Ch. 20 - (Guessing the capitals) Rewrite Programming...Ch. 20 - (Sort points in a plane) Write a program that...Ch. 20 - (Combine colliding bouncing balls) The example in...Ch. 20 - (Game: lottery) Revise Programming Exercise 3.15...Ch. 20 - Prob. 20.9PECh. 20 - Prob. 20.10PECh. 20 - (Match grouping symbols) A Java program contains...Ch. 20 - Prob. 20.12PECh. 20 - Prob. 20.14PECh. 20 - Prob. 20.16PECh. 20 - (Directory size) Listing 18.10,...Ch. 20 - Prob. 20.20PECh. 20 - (Nonrecursive Tower of Hanoi) Implement the...Ch. 20 - Evaluate expression Modify Listing 20.12,...
Knowledge Booster
Similar questions
- What happens if you attempt to search up a value and the key in the map does not exist?arrow_forwardImplement the "Add song" menu item. New additions are added to the end of the list. Ex: ADD SONG Enter song's unique ID: SD123 Enter song's name: Peg Enter artist's name: Steely Dan Enter song's length (in seconds): 237arrow_forwardAsk the user for a starting point and ending point. Sort the user list using the method on the previous question but only display the users within the entered range. Here is the data text. I cant copy and paste it because it is too long. https://textuploader.com/t1ol7 I already Have a code but it doesn't sort right. I believe there is something wrong. The pic without red should be the correct answer. import java.io.File;import java.io.FileNotFoundException;import java.util.ArrayList;import java.util.Scanner;public class ggk{public static void main(String[] args){String filename = "user-database.txt";Scanner infile = null;try {infile = new Scanner(new File(filename));} catch (FileNotFoundException e) {System.out.println(e.getMessage());}ArrayList<String> usernames = new ArrayList<String>();ArrayList<String> passwords = new ArrayList<String>();int start, end;Scanner input = new Scanner(System.in);System.out.println("Enter a starting point and ending point");start…arrow_forward
- This problem has you write a nested loop to process a list of list of int, and accumulate a list of list of int. The starter code provides an accumulator for the result and a loop over the lists, and you need to write the code that checks whether sublist contains only even ints. You'll probably want a one-way flag: a Boolean variable that starts out as True and is set to False if you find an odd int in the sublist. You'll need to check the value of this variable to figure out whether to append sublist to the even_lists accumulator. 1 def only_evens (1st: list[list[int]]) -> list[list[int]]: """Return a list of the lists in 1st that contain only even integers. 4 >>> only_evens ([[1, 2, 4], [4, 0, 6], [22, 4, 3], [2]]) [[4, 0, 6], [2]] 6. 8. even_lists = [] 10 for sublist in 1st: 11 12 # write your code here (please read above for a suggested approach) 13 14 return even_listsarrow_forwardThis problem has you write a nested loop to process a list of list of int, and accumulate a list of list of int. The starter code provides an accumulator for the result and a loop over the lists, and you need to write the code that checks whether sublist contains only even ints. You'll probably want a one-way flag: a Boolean variable that starts out as True and is set to False if you find an odd int in the sublist. You'll need to check the value of this variable to figure out whether to append sublist to the even_lists accumulator. 1 def only evens (1st: list[list[int]]) -> list[list[int]]: **"Return a list of the lists in 1st that contain only even integers. 2. 3. >>> only_evens ([[1, 2, 4], [4, e, 6], [22, 4, 3], [2]]) 4. [[4, e, 6], [2]] 8. even_lists = [] 10 for sublist in 1st: 11 12 13 14 return even_lists History Submit P Type here to search 100% 1:1 8°C Cloudy A 4) ENG 10/2arrow_forwardIn Java please. Add comments as well. Thank you!arrow_forward
- The mean of a list of numbers is its arithmetic average. The median of a list is its middle value when the values are placed in order. For example, if an ordered list contains 1, 2, 3, 4, 5, 6, 10, 11, and 12, then the mean is 6, and their median is 5. Write an application that allows you to enter nine integers and displays the values, their mean, and their median.arrow_forwardQ.Create an interesting educational information chat box that asks the user to give an input question and then answers the question given by user with a suitable answer. You can make use of list for different questions and answers.Save two to three answers for a single question and then for random selection of elements from those answers use random choice(list) method from random module that returns a random element. Also for a user question that doesn't matches with the questions present in the chat box it should display statement like "oops i can't answer that" "sorry i am not intelligent enough" "could u please ask something else" using random method so that every time one of these statements appear **coding language python ***try using basic programming techniques in python without using arrays and pointers * * * copy paste the program itself and also the screenshot of program and output * * * use any type of data for questions such as name details of cities species etc depends on…arrow_forwardWhat happens when you add two entries to a map with the same value and two different keys?arrow_forward
- 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.arrow_forwardWhat happens when you remove the entry from position 4 from a List? Select one: a. All of these b. The entry in the 4th position is returned (if there was a 4th entry) c. If the List has 3 or fewer entries, an IndexOutOfBoundsException is thrown d. If the List has 5 or more entries, the entries in positions 5 and up will move up 1 spot earlier to close up the gap vacated by removing the 4th entryarrow_forwardWrite out the header of a for-each loop to process an ArrayList called tracks. Don’t worry about the loop’s body.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you