. In order to avoid deadlock between threads we can use a —— object. 2. A class —— another if its objects contain objects of the other class.
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1. In order to avoid deadlock between threads we can use a —— object.
2. A class —— another if its objects contain objects of the other class.
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- 4. naloga:1. Write a program in the Java programming language where two threads access thecommon object of the Print class.2. Class Print contains only one variable type String, whose value is assigned by theconstructor.3. Both threads access the object of the class Print and print in reverse order the valueof the variable type String, letter by letter, where each letter is printed with a hyphen(–).Example for FAMNIT: T–T–I–I–N–N–M–M–A–A–F–FHere is Hands-on Activity below. Movie Time Objective: At the end of the exercise, the students should be able to: ▪ Implement queues in both Java and Python.Software Requirements:▪ NetBeans IDE▪ Java Development Kit (JDK) 8▪ Python 3.7 or higherProcedure:1. Create a folder named LastName_FirstName in your local drive. (ex. Reyes_Mark)2. Using NetBeans, create a Java project named MovieTime. Set the project location to your ownfolder.3. Import Scanner, Queue, and LinkedList from the java.util package.4. Create two (2) Queue objects named movies and snacks.5. The output shall:5.1.Ask the user to input three (3) movies that s/he would like to watch in a cinema.5.2.Ask the user to input three (3) snacks or beverages that s/he would like to eat or drink whilewatching these movies.5.3.Display all the movies and snacks in separate lines.5.4.Ask the user to type S whenever s/he is done eating or drinking a snack.5.5.Display the snacks remaining each time S is pressed and "No more snacks" when…Scenario: You have been tasked with building a URL file validator for a web crawler. A web crawler is an application that fetches a web page, extracts the URLs present in that page, and then recursively fetches new pages using the extracted URLs. The end goal of a web crawler is to collect text data, images, or other resources present in order to validate resource URLs or hyperlinks on a page. URL validators can be useful to validate if the extracted URL is a valid resource to fetch. In this scenario, you will build a URL validator that checks for supported protocols and file types.
- Modify this threading example to use, exclusively, multiprocessing, instead of threading. import threadingimport time class BankAccount(): def __init__(self, name, balance): self.name = name self.balance = balance def __str__(self): return self.name # These accounts are our shared resourcesaccount1 = BankAccount("account1", 100)account2 = BankAccount("account2", 0) class BankTransferThread(threading.Thread): def __init__(self, sender, receiver, amount): threading.Thread.__init__(self) self.sender = sender self.receiver = receiver self.amount = amount def run(self): sender_initial_balance = self.sender.balance sender_initial_balance -= self.amount # Inserting delay to allow switch between threads time.sleep(0.001) self.sender.balance = sender_initial_balance receiver_initial_balance = self.receiver.balance receiver_initial_balance += self.amount # Inserting delay to allow switch between threads time.sleep(0.001)…Question 12 A JavaBeans class has the following characteristics except O Has getter and setter methods O Has constructor that can take arguments O Implementing serializable is not mandatory O Can be transported outside of Java's memory Question 13 As a programmer your objective is to synchronize a full sequence of operation. Which of the following is not true to that objective? O Synchronizing part of an operation is less safe O Synchronizing part of an operation makes the program slower O Synchronizing part of an operation is allowed by array list O Synchronizing part of an operation makes the program cumbersomeDevelop a Java application using NetBeans called ICFK 1200metersRace that will simulate a K-1 200 metres race between 2 people Your program must make use of threads to simulate the race. Create and start your threads in your main class. Your program must have a class called Athletes that implements the Runnable interface with a constructor that takes a String name which will be the athlete’s name. The Athletes class should have a run() method. This should simulate the times the athletes pass the 20-meter intervals. The run method should also allow a thread to sleep for a random interval of up to 3 seconds. After the run method has executed, the athlete’s name should be output to the screen to simulate that they have finished the race.
- 3. Implement mutual exclusion with multithreading in Java Build a Java program which simulates a communication between a server and clients. You must use a thread to represent each party (as server or client). (Hint: study about the Semaphore class to perform mutual exclusion between threads) Create three threads. One thread will act as a server, which always ready to receive a message from a client (ping) and then replies the message to the same client (pong). The other two threads will become the clients, where each client will send a message to the server (ping) and waits for the reply (pong). Define 2 different classes to represent the server and the client. To perform the communication, each thread will refer to a same variable/data structure for sending and receiving the message. Use mutual exclusion approach to ensure each client can send and receive the reply without interruption from any other client(s). For this simulation, your objective is to ensure that each client must…Challenge 3: Encryption.java and Decryption.java Write an Encryption class that encrypts the contents of a binary file. Your encryption program should work like a filter, reading the contents of one file, modifying the data into a code, and then writing the coded content out to a second file. The second file will be a version of the first file, but written in a secret code. Use a simple encryption technique, such as reading one character at a time, and add 10 to the character code of each character before it is written to the second file. Come up with your own encryption method. Also write a Decryption class that reads the file produced by the Encryption program. The decryption file will use the method that you used and restore the data to its original state, and write it to a new file.PLZ help with the following: True/False In java it is possible to throw an exception, catch it, then re-throw that same exception if it is desired GUIs are windowing interfaces that handle user input and output. An interface can contain defined constants as well as method headings or instead of method headings. When a recursive call is encountered, computation is temporarily suspended; all of the information needed to continue the computation is saved and the recursive call is evaluated. Can you have a static method in a nonstatic inner class?
- Java: In this scenario, one thread is waiting for another thread to finish transfer and vice versa. They are stuck with each other, and the program cannot continue. Thus, deadlock occurs. To avoid deadlock it is necessary to lock accounts in the same order. To fix the program we’ll give each account a unique number so that we can lock accounts in the same order when transferring the money. // // DeadlockAccounts.java // public class DeadlockAccounts { public static void main(String[] args) throws InterruptedException { class Account { int balance = 100; public Account(int balance) { this.balance = balance; } public synchronized void deposit(int amount) { balance += amount; } public synchronized boolean withdraw(int amount) { if (balance >= amount) { balance -= amount; return true; } return false; } public synchronized boolean transfer(Account destination, int amount) { if (balance >= amount) { balance -= amount; synchronized(destination) {…#SumCalculator Class: Create a class named SumCalculator that extends the Thread class. This class calculates the sum of numbers within a provided range. Declare three instance variables: start, end, and sum in the SumCalculator class . start and end are the lower and upper bounds of the range, respectively, while sum stores the sum of the numbers within the range. Create a constructor that takes in two parameters: start and end, and initializes the corresponding instance variables. The sum variable should be initialized to 0. Define the run method to calculate the sum of the numbers within the range. Inside of the run method use a for-loop to iterate over the numbers within the range and add each number to the sum variable. Define the accessor method getSum that returns the value of the sum variable. #Main Class: Create a class named Main that contains the main method, the entry point of the program. Create two objects of the SumCalculator class , with the first…JAVA You are requested to implement a “message buffer and response connector” class using Javaprogramming language. The following figure depicts a message buffer and response connectorclass, followed by detailed operations specifications. The message buffer and response connectorclass has three operations, send(), receive(), and reply().Your program should create two separate threads for testing your implementation, a producerthread, and a consumer thread. The producer thread sends a message having a structure (string,integer) – e.g., (add, 3) or (multiply, 7) - to a consumer thread via a message buffer and responseconnector. The consumer thread encapsulates a SimpleCalculation class that has two operations,add() and “multiply(). You should implement the SimpleCalculation class as well. When theconsumer thread receives a message from the connector, it extracts the message and then callsone of the operations on the SimpleCalculation class, depending on the message. For example,the…
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