In Java, objects are explicitly deallocated from the stack. True False
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- public static CS150 getInstance(){ //TODO implement a single return null; }Use Python for this question. Also please comment what each line of code means for this question as well: Inheritance (based on 8.38) You MUST use inheritance for this problem. A stack is a sequence container type that, like a queue, supports very restrictive access methods: all insertions and removals are from one end of the stack, typically referred to as the top of the stack. A stack is often referred to as a last-in first-out (LIFO) container because the last item inserted is the first removed. Implement a Stack class using Note that this means you may be able to inherit some of the methods below. Which ones? (Try not writing those and see if it works!) Constructor/_init__ - Can construct either an empty stack, or initialized with a list of items, the first item is at the bottom, the last is at the top. push() – take an item as input and push it on the top of the stack pop() – remove and return the item at the top of the stack isEmpty() – returns True if the stack is empty,…stacks and queues. program must be able to handle all test cases without causing an exception Note that this problem does not require recursion to solve (though you can use that if you wish).
- Arrays in Java are objects that use reference semantics. Explain what this means and How it affects modification of arrays. You must start a thread before you can read and reply to other threadsALL ABOUT ARRAYLISTMachine Problem #1. Write a method-oriented Java program to create a new array list of size 10, add somecountries (string) and print out the collection. Class Name: ArrayListMethodCountriesSample Input/OutputList of CountriesJapanUSPhilippinesKuwaitOmanSingaporeHong KongMalaysiaGreat Britain Machine Problem #2. Write a method-oriented Java program that asks the user to input two numbers and getthe sum, difference, product, and average of the numbers inputted. Class Name: MethodFourOperationsSample Input/OutputEnter num1 :90Enter num 2:88The sum is: 178The difference is: 2The product is: 7920The quotient is: 89USE JAVA LANGUAGE1. Label the diffTerent parts of a Java code. import java.util.; // public class SimpleHashtableExample{ public static void main (String[] args) { //_ Hashtable ht = new Hashtable (); // ht.put ("One", new Integer(1)); // ht.put ("One", new Integer (1)): Object obj = ht.get ("One"); //_ %3D System.out.println (obj): //_
- In Java, Explain when it might be preferable to use a map instead of a set.OCaml Code: The goal of this project is to understand and build an interpreter for a small, OCaml-like, stackbased bytecode language. Make sure that the code compiles correctly without any errors and provide the code with the screenshots of the outputs. The code must have a function that takes a pair of strings (tuple) and returns a unit. Make sure to have the following methods below: -Push integers, strings, and names on the stack -Push booleans -Pushing an error literal or unit literal will push :error: or :unit: onto the stack, respectively -Command pop removes the top value from the stack -The command add refers to integer addition. Since this is a binary operator, it consumes the top two values in the stack, calculates the sum and pushes the result back to the stack - Command sub refers to integer subtraction where if top two elements in the stack are integer numbers, pop the top element(y) and the next element(x), subtract y from x, and push the result x-y back onto the stack…Please help create UML diagram for the java below. Thank you, the code is written below public class QueueUnderflowException extends Exception { QueueUnderflowException(){ super("Queue is empty."); } }
- You will create two programs. The first one will use the data structure Stack and the other program will use the data structure Queue. Keep in mind that you should already know from your video and free textbook that Java uses a LinkedList integration for Queue. Stack Program Create a deck of cards using an array (Array size 15). Each card is an object. So you will have to create a Card class that has a value (1 - 10, Jack, Queen, King, Ace) and suit (clubs, diamonds, heart, spade). You will create a stack and randomly pick a card from the deck to put be pushed onto the stack. You will repeat this 5 times. Then you will take cards off the top of the stack (pop) and reveal the values of the cards in the output. As a challenge, you may have the user guess the value and suit of the card at the bottom of the stack. Queue Program There is a new concert coming to town. This concert is popular and has a long line. The line uses the data structure Queue. The people in the line are objects…how to create an interface in java that contains the following methods: boolean myPush(T element); // pushes element onto the stack; returns true if element successfully pushed, false otherwise boolean myPop(); // removes the top element of the stack; returns true if element successfully popped, false otherwise T myTop(); // if the stack is not empty returns the top element of the stack, otherwise returns null String toString(); // returns contents of the stack as a single String int size(); // return number of elements in the stack then create java file that Implements your interface that you created as a linked stack, then use the driver shown in screen shot to test. below is the code for the LLNode class public class LLNode<T> { protected LLNode<T> link; protected T info; public LLNode(T info) { this.info = info; link = null; } public void setInfo(T info) { this.info = info; } public T getInfo() { return info; } public void setLink(LLNode<T> link) {…1. Goals and Overview The goal of this assignment is to practice creating a hash table. This assignment also has an alternative, described in Section 5. A hash table stores values into a table (meaning an array) at a position determined by a hash function. 2. Hash Function and Values Every Java object has a method int hashCode() which returns an int suitable for use in a hash table. Most classes use the hashCode method they inherit from object, but classes such as string define their own hashCode method, overriding the one in object. For this assignments, your hash table stores values of type public class HashKeyValue { K key; V value; } 3. Hash Table using Chained Hashing Create a hash table class (called HashTable211.java) satisfying the following interface: public interface HashInterface { void add(K key, V value); // always succeeds as long as there is enough memory V find (K key); // returns null if there is no such key } Internally, your hash table is defined as a private…