Objects First with Java: A Practical Introduction Using BlueJ (6th Edition)
6th Edition
ISBN: 9780134477367
Author: David J. Barnes, Michael Kolling
Publisher: PEARSON
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Textbook Question
Chapter 4, Problem 28E
Write out the header of a for-each loop to process an ArrayList
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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
Use the right loop for the right assignment, using all the follow- ing loops: for, while without hasNext(), while with hasNext() and do-while.
So I cannot use array.
it has to be done in java.
java
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).
Chapter 4 Solutions
Objects First with Java: A Practical Introduction Using BlueJ (6th Edition)
Ch. 4 - Prob. 1ECh. 4 - What happens if you create a new MusicOrganizer...Ch. 4 - Prob. 3ECh. 4 - Prob. 4ECh. 4 - Write a declaration of a local variable called...Ch. 4 - Prob. 6ECh. 4 - Write assignments to the library, cs101. and track...Ch. 4 - If a collection stores 10 objects, what value...Ch. 4 - Write a method call using get to return the fifth...Ch. 4 - Prob. 10E
Ch. 4 - Write a method call to add the object held in the...Ch. 4 - Write a method call to remove the third object...Ch. 4 - Suppose that an object is stored at index 6 in a...Ch. 4 - Add a method called checklndex to the...Ch. 4 - Write an alternative version of checkIndex called...Ch. 4 - Rewrite both the 1istFi1e and removeFi1e methods...Ch. 4 - Prob. 17ECh. 4 - Prob. 18ECh. 4 - We know that the first file name is stored at...Ch. 4 - Prob. 20ECh. 4 - Create a MusicOrganizer and store a few file names...Ch. 4 - Create an ArrayList<String> in the Code Pad by...Ch. 4 - If you wish, you could use the debugger to help...Ch. 4 - Challenge exercise The for-each loop does not use...Ch. 4 - Prob. 25ECh. 4 - Prob. 26ECh. 4 - Prob. 27ECh. 4 - Write out the header of a for-each loop to process...Ch. 4 - Suppose we express the first version of the key...Ch. 4 - Write a while loop (for example, in a method...Ch. 4 - Write a while loop to add up the values 1 to 10...Ch. 4 - Write a method called sum with a while loop that...Ch. 4 - Challenge exercise Write a method isPrime (int n)...Ch. 4 - In the findFirst method, the loop's condition...Ch. 4 - Prob. 35ECh. 4 - Have the MusicOrganizer increment the play count...Ch. 4 - Prob. 37ECh. 4 - Prob. 38ECh. 4 - Prob. 39ECh. 4 - Prob. 40ECh. 4 - Complete the numberOfMembers method to return the...Ch. 4 - Prob. 42ECh. 4 - Prob. 43ECh. 4 - Prob. 44ECh. 4 - Challenge exercise Write a method to play every...Ch. 4 - Prob. 46ECh. 4 - Prob. 47ECh. 4 - Add a close method to the Auction class. This...Ch. 4 - Add a getUnsold method to the Auction class with...Ch. 4 - Suppose the Auction class includes a method that...Ch. 4 - Rewrite getLot so that it does not rely on a lot...Ch. 4 - Prob. 52ECh. 4 - Prob. 53ECh. 4 - Prob. 54ECh. 4 - Prob. 55ECh. 4 - Open the products project and complete the...Ch. 4 - Implement the findProduct method. This should look...Ch. 4 - Implement the numberInStock method. This should...Ch. 4 - Prob. 59ECh. 4 - Challenge exercise Implement a method in...Ch. 4 - Java provides another type of loop: the do-while...Ch. 4 - Prob. 85ECh. 4 - Prob. 86ECh. 4 - Find out about Java's switch-case statement. What...
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- write a for-each loop that prints all the elements in a collection of Student objects called role. what is required for that loop to work?arrow_forwardwrite a program that uses a for loop. You’ll need to be able to explain it (not just send the code). In particular, explain how the loop works, and how the different forms of loop (for, for/list, for/vector, etc) are different from one another (this will require some experimentation to find out what each one does). Using racketarrow_forwardmake the array an arraylist instead and include the file you usedarrow_forward
- Write assignments to the library, cs101, and track variables (which you defined in the previous three exercises) to create the appropriate ArrayList objects. Write them once using diamond notation and once without diamond notation, specifying the full type.arrow_forwardCreate 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: 9780134670942arrow_forwardCreate 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_forward
- Java 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 Beyoncearrow_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. from typing import List def only_evens(lst: List[List[int]]) -> List[List[int]]: """Return a list of the lists in lst that contain only even integers. >>> only_evens([[1, 2, 4], [4, 0, 6], [22, 4, 3], [2]]) [[4, 0, 6], [2]] """ even_lists = [] for sublist in lst: # write your code here (please read above for a suggested approach) 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_forward
- Write this program in Java using a custom method. Implementation details You will implement this program in a specific way in order to gain some experience with loops, arrays and array lists. Use an array of strings to store the 4 strings listed in the description. Use a do-while loop for your 'game engine'. This means the game starts once the user enters money. The decision to stop occurs at the bottom of the loop. The do-while loop keeps going until the user quits, or there is no money left. The pseudocode for this 'game engine' is shown below: determine the fruits to display (step 3 below) and print them determine if there are 3 or 4 of the same image display the results update the customer balance as necessary prompt to play or quit continue loop if customer wants to play and there's money for another game. Use the Random class to generate a random number between 0 and 3. This random number will be an index into the array of strings. Add the string at that index to an…arrow_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. 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_forwardWrite a loop that sets each array element to the sum of itself and the next element, except for the last element which stays the same. Be careful not to index beyond the last element. Ex: Initial scores: 10, 20, 30, 40 Scores after the loop: 30, 50, 70, 40 The first element is 30 or 10 + 20, the second element is 50 or 20 + 30, and the third element is 70 or 30 + 40. The last element remains the same. 324758.2040686.qx3zqy7 1 #include 2 3 int main(void) { const int SCORES SIZE = 4; int bonusScores[SCORES_SIZE]; int i; 4 6. for (i = 0; i < SCORES_SIZE; ++i) { scanf("%d", &(bonusscores[i])); } 8 9. 10 11 12 * Your solution goes here */ 13 for (i = 0; i < SCORES_SIZE; ++i) { printf("%d ", bonusscores[i]); 14 15 16 17 printf("\n"); 18arrow_forward
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