Concept explainers
(Modify BST using Comparator) Revise BST in Listing 25.4 using a Comparator for comparing objects. Define the new class as BST<E> with two constructors:
BST(); // Compare elements using their natural order
BST(Comparator<? super E> comparator)
Hint: You need to add a data field for Comparator in the BST class as follows:
protected Comparator<E> c = (e1, e2) ->
((Comparable<E>)e1).compareTo(e2);
The lambda expression gives the default comparator using a natural order. You need to use comparator c to replace e.compareTo(anotherElement) with c.compar(e, anotherElement) in Listing 25.4.
Want to see the full answer?
Check out a sample textbook solutionChapter 25 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Additional Engineering Textbook Solutions
Software Engineering (10th Edition)
Java How To Program (Early Objects)
Digital Fundamentals (11th Edition)
Starting Out with Java: From Control Structures through Data Structures (3rd Edition)
Starting out with Visual C# (4th Edition)
C How to Program (8th Edition)
- It's well knowledge that "points" have problems with "dangling and wild pointers." Provide evidence to back up the claim you made.arrow_forwarddefined the cat class in fullarrow_forwardLab 10 Using an interface to share methods It is often the case that two or more classes share a common set of methods. For programming purposes we might wish to treat the objects of those classes in a similar way by invoking some of their common routines.For example, the Dog and Cat classes listed below agree on the void method speak. Because Dog and Cat objects have the ability to “speak,” it is natural to think of putting both types of objects in an ArrayList and invoking speak on every object in the list. Is this possible? Certainly we could create an ArrayList of Dog that would hold all the Dog objects, but can we then add a Cat object to an ArrayList of Dog?Try running the main program below as it is written. Run it a second time after uncommenting the line that instantiates a Cat object and tries to add it to the ArrayList. import java.util.*;public class AnimalRunner{ public static void main(String[] args) { ArrayList<Dog> dogcatList = new ArrayList<Dog>();…arrow_forward
- Does a friend function violate the data hiding? Explain briefly. Write a program to swap variables of two classes using friend function. C++arrow_forwardPractice overriding. In a main, build an object of that class, and print out the object using System.out.println(). Notice that this simply reports the memory address of the object in question, and we’d like to do something more useful. To replace (or override) the toString (or equals) function. We build another toString function to override the other one that also prints out the make, model, and odometer reading for a vehicle object. Reuse your Car class in the last exercise. public class Car { //instance variables private int odometer; private String make; private String model; //overloading //constructors public Car(int odometer,String make, String model) { this.odometer = odometer; this.make = make; this.model = model; } public Car(String make, String model) { this.make = make; this.model = model; } public Car(String make) { this.make = make; } /* *getter & setter methods */…arrow_forwardC++ Using Card and Deck class created during the lecture or your own implementation that follows the spec for a card and deck, implement the following game: game is designed for a single player who is playing against the computeryou draw three cards for each player (player and a computer) Using the compare function from the Card class you compare each pair drawnIf the player's card is higher, the player gets a pointYou repeat this comparison 3 times (for each pair of cards you draw)The player wins if he gets more points than a computer (has more higher cards than the computer)arrow_forward
- Define Void Pointer?arrow_forwardC++ please help me answer this question I will give you a good rating Thank you! 1. True or False. Explain why? _____ A function template may use non-template types, both in the body of the function and in the parameter list. _____ A non-const object (i.e. an object instantiated without the const keyword) cannot invoke a member function of the class that is declared to be const. _____ You can use the assignment operator = to set an object to another object without overloading, no exceptions.arrow_forwardProfile the performance of the memoized version of the Fibonacci function defined in Project 6. The function should count the number of recursive calls. State its computational complexity using big-O notation, and justify your answer. The fib function header has been modified to include the counter as the second parameter. Define the Counter class, it should have three methods: __init__, increment, and __str__. When an instance of the Counterclass is passed as a parameter, the countproperty of that instance should be incremented based on the number of recursive calls. The __str__ method should return the countproperty's value as a string. Please can you change the solution to this problem here, because this is wrong. """ File: fib.py Project 11.7 Employs memoization to improve the efficiency of recursive Fibonacci. Counts the calls and displays the results. """ class Counter(object): def__init__(self,count=0): self.count=count defincrement(self): self.count+=1 def__str__(self):…arrow_forward
- Java programming - Using your knowledge in oop, inheritance, generics, create a generic class from non-generic class then create objects of type (int, sting, boolean, mixed). Write all necessary classes, functions that will return an object of each inherited data typearrow_forwardCan you please help me with these three questions? 1) A designator used to give a non-member function in C++ access to the private data members of a class, even though the function is not technically part of the class, is called ______ 2) The stack operation that is required when using an array implementation, but is not required when using a linked list implementation, is ___ . isFull() push() pop() peek() 3) A mechanism in C++ that interrupts program execution when errors occur and signals the rest of the program that something unexpected has happened is a(n) ___ . exception logic error catch phrase interceptionarrow_forwardQuestion#6 To use Parameterized.class with the @RunWith annotation, we need to import __________i. org.junit.runners.Parameterizedii. org.junit.Parameterizediii. org.junit.runners.Parameterizediv. org.runners.Parameterizedarrow_forward
- C++ Programming: From Problem Analysis to Program...Computer ScienceISBN:9781337102087Author:D. S. MalikPublisher:Cengage Learning