Write is the output of the following program with explanation? interface A { } class C
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Write is the output of the following
interface A { }
class C { }
class D extends C { }
class B extends D implements A { }
public class Test {
public static void main(String[] args){ B b = new B();
if (b instanceof A)
System.out.println("b is an instance of A");
}
}
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- what is the problem with the following code. Give reason for your answer. public class MyClass\{ public static void main(String[] args) \{ int n[]={1,3,5,6} ; int b[]; b=n; \} \}How can I write the repeating code just once in Python class subclass inheritance? For example there is a code that the same self._date = date is repeating for every class, please write down the possible ways to not repeat the same line of code that influences for all classes. class Item(): def __init__(self, date):self._date = date class Book(Item):def __init__(self, date):self._date = date class Pen(Item): def __init__(self, date):self._date = dateDoes below code compile successfully? If not, why?interface A{int i = 111;}class B implements A{void methodB() 3 {i = 222;}}
- Please implement in Java implement a keyed bag in which the items to be stored are strings (perhaps people’s names) and the keys are numbers (perhaps Social Security or other identification numbers). So, the in- sertion method has this specification: public void insert(String entry, int key);// Precondition: size( ) < CAPACITY, and the // bag does not yet contain any item// with the given key.// Postcondition: A new copy of entry has// been added to the bag, with the given key. When the programmer wants to remove or retrieve an item from a keyed bag, the key of the item must be specified rather than the item itself. The keyed bag should also have a boolean method that can be used to determine whether the bag has an item with a specified key. In a keyed bag, the pro- grammer using the class specifies a particular key when an item is inserted. Here’s an implementation idea: A keyed bag can have two private arrays, one that holds the string data and one that holds the corresponding…WITE JAVA CODE JUST TO THE GIVEN CODE BELOW! TESTS GIVE ERROR FOR SHRINK AND add remove 100 values ALSO, DO IT BY CHECKING THE MAIN CLASS WITHOUT CHANGING IT class Queue<T> { private T[] a = (T[]) new Object[1]; private int N = 0; public boolean isEmpty() { return N == 0; } public int size() { return N; } private void resize(int capacity) { T[] temp = (T[]) new Object[capacity]; for (int i = 0; i < N; i++) { temp[i] = a[i]; } a = temp; } public void enqueue(T item) { if (N == a.length) resize(2*a.length); a[N++] = item; } public T dequeue() { T item = a[--N]; a[N] = null; if (N > 0 && N == a.length/4) resize(a.length/2); return item; } // this method is for unit testing; don't touch public int getArraySize(){ return a.length; }} public class Main { public static void main(String[] args) { Queue<Integer> myQueue = new Queue<Integer>(); int i; i = 1; myQueue.enqueue(i);…Python: implement a class called point, the class contains two values of a type of integer (x and y). Define both as private. Add the following to the class: 1. Default initializer, used to create objects of type Point, by default x and y are set to 1. 2. Initializer with two parameters for x and y. 3. Set and get methods for x 4. Set and get methods for y 5. Method __str__, which returns a string that represent the Point(e.g., p = [4,5])
- Implement a toString method for the following class that returns a string containing the class name and the names and values of all instance variables.class B extends A {} is the correct way to implement an interface in Java. True or False?Write a Java program with at least two classes. Use a circle object to represent it. The class must offer at least one (non-static) setter method and one (non-static) getter method. Implement at least one test that invokes the setter method and the corresponding getter method so that the value out == the value in. Also use assert.Equal(60, circle1.getCircumference(), 10); and assert.Equals(10, circle1.get Radius(), 0.1); for radius
- Provide a method that swaps the values with the smallest and largest measure in an array of objects of a class that implements the Measurable interface. ** A bank account has a balance that can be changed by deposits and withdrawals.*/public class BankAccount implements Measurable{ private double balance; /** Constructs a bank account with a zero balance. */ public BankAccount() { balance = 0; } /** Constructs a bank account with a given balance. @param initialBalance the initial balance */ public BankAccount(double initialBalance) { balance = initialBalance; } /** Deposits money into the bank account. @param amount the amount to deposit */ public void deposit(double amount) { balance = balance + amount; } /** Withdraws money from the bank account. @param amount the amount to withdraw */ public void withdraw(double amount) { balance = balance - amount; } /**…Please write a Java program with at least two classes. Use a circle to represent it! The class should have at least one non-static setter method and one non-static getter. Implement at least one method test that invokes the setter method and the corresponding getter method so that the value out == the value in!Consider a class that could be used to play a game of hangman. The classhas the following attributes:- the secret word- the disguised word, in which each unknown letter is replaced with a question mark (?). For example, if the secret word isabracadabra and the letters a, b, and e have been guessed, the disguisedword would be ab?a?a?ab?a.- the number of guesses made- the number of incorrect guessesIt will have the following methods:- makeGuess(c) guesses that character c is in the word.- getDisguisedWord returns a string containing correctly guessed letters in their correct positions and unknown letters replaced with ?.- getSecretWord returns the secret word.- getGuessCount returns the number of guesses made.- isFound returns true if the hidden word has been discovered.a. write method heading for eeach methodb. write preconditions and postconditions for each methodc. write some java statements that test the classd. Implement the class.2. Write an application that plays the game of…