Introduction to Java Programming and Data Structures, Comprehensive Version, Student Value Edition (11th Edition)
11th Edition
ISBN: 9780134671604
Author: Y. Daniel Liang
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 11.9, Problem 11.9.4CP
What is wrong in the following code?
1 public class Test {
2 public static void main(String[] args) {
3 Object fruit = new Fruit();
4 Object apple = (Apple)fruit;
5 }
6 }
7
7 class Apple extends Fruit {
8 }
10
9 class Fruit {
10 }
11
12
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
JAVA Language
Caesar Shift
Question:
Modify the Caesar class so that it will allow various sized shifts to be used, instead of just a shift of size 3. (Hint: Use an instance variable in the Caesar class to represent the shift, add a constructor to set it, and change the encode method to use it.)
import java.util.*;
public class TestCipher { public static void main(String[] args) { int shift = 7; Caesar caesar = new Caesar(); String text = "hello world"; String encryptTxt = caesar.encrypt(text); System.out.println(text + " encrypted with shift " + shift + " is " + encryptTxt); } }
abstract class Cipher { public String encrypt(String s) { StringBuffer result = new StringBuffer(""); // Use a StringBuffer StringTokenizer words = new StringTokenizer(s); // Break s into its words while (words.hasMoreTokens()) { // For each word in s…
5 points
Save Answer
QUESTION 4
What is printed?
public class Puppy {
private int puppyAge;
private String puppyName;
Puppy(String name){ puppyName = name ;}
public void setAge( int age ) { puppyAge = ++age; }
public int getAge(){ return puppyAge; }
%3D
public class TestPuppy{
public static void main(String []args) {
Puppy myPuppy = new Puppy( "tommy" );
myPuppy.setAge( 2 );
System.out.print("Puppy's age is :" + myPuppy.getAge());
System.out.print("
%3D
Name chosen is :" + myPuppy.puppyNname );
D Puppy's age is : 2 Name chosen is : tommy
Puppy's age is : 3 Name chosen is : tommy
O Syntax Error
O Run Time Error
Save All Answers
Close Window
Save and Submit
- Save and Submit to save and submit. Click Save All Answers to save all answers.
MacBook Pro
888
ES
F6
F3
96
7
Trace through the following program and show the output. Show your work for partial credit.
public class Employee {
private static int empID = 1111l;
private String name , position;
double salary;
public Employee(String name) {
empID ++;
this.name 3 пате;
}
public Employee(Employee obj) {
empID = obj.empĪD;
пате %3D оbj.naте;
position = obj.position;
%3D
public void empPosition(String empPosition) {position = empPosition;}
public void empSalary(double empSalary) { salary = empSalary;}
public String toString() {
return name + " "+empID + "
"+ position +" $"+salary;
public void setName(String empName){ name = empName;}
public static void main(String args[]) {
Employee empOne = new Employee("James Smith"), empTwo;
%3D
empOne.empPosition("Senior Software Engineer");
етрOпе.етpSalary(1000);
System.out.println(empOne);
еmpTwo
empTwo.empPosition("CEO");
System.out.println(empOne);
System.out.println(empTwo);
%3D етpОпе
empOne ;
Chapter 11 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version, Student Value Edition (11th Edition)
Ch. 11.2 - True or false? A subclass is subset of a...Ch. 11.2 - What keyword do you use to define a subclass?Ch. 11.2 - What is single inheritance? What is multiple...Ch. 11.3 - What is the output of running the class C in (a)?...Ch. 11.3 - How does a subclass invoke its superclasss...Ch. 11.3 - True or false? When invoking a constructor from a...Ch. 11.4 - True or false? You can override a private method...Ch. 11.4 - True or false? You can override a static method...Ch. 11.4 - How do you explicitly invoke a superclasss...Ch. 11.4 - How do you invoke an overridden superclass method...
Ch. 11.5 - Identify the problems in the following code:...Ch. 11.5 - Prob. 11.5.2CPCh. 11.5 - If a method in a subclass has the same signature...Ch. 11.5 - If a method in a subclass has the same signature...Ch. 11.5 - If a method in a subclass has the same name as a...Ch. 11.5 - Prob. 11.5.6CPCh. 11.7 - Prob. 11.7.1CPCh. 11.8 - Prob. 11.8.1CPCh. 11.8 - Prob. 11.8.2CPCh. 11.8 - Can you assign new int[50], new Integer [50], new...Ch. 11.8 - Prob. 11.8.4CPCh. 11.8 - Show the output of the following code:Ch. 11.8 - Show the output of following program: 1public...Ch. 11.8 - Show the output of following program: public class...Ch. 11.9 - Indicate true or false for the following...Ch. 11.9 - For the GeometricObject and Circle classes in...Ch. 11.9 - Suppose Fruit, Apple, Orange, GoldenDelicious, and...Ch. 11.9 - What is wrong in the following code? 1public class...Ch. 11.10 - Prob. 11.10.1CPCh. 11.11 - Prob. 11.11.1CPCh. 11.11 - Prob. 11.11.2CPCh. 11.11 - Prob. 11.11.3CPCh. 11.11 - Prob. 11.11.4CPCh. 11.11 - Prob. 11.11.5CPCh. 11.12 - Correct errors in the following statements: int[]...Ch. 11.12 - Correct errors in the following statements: int[]...Ch. 11.13 - Prob. 11.13.1CPCh. 11.14 - What modifier should you use on a class so a class...Ch. 11.14 - Prob. 11.14.2CPCh. 11.14 - In the following code, the classes A and B are in...Ch. 11.14 - In the following code, the classes A and B are in...Ch. 11.15 - Prob. 11.15.1CPCh. 11.15 - Indicate true or false for the following...Ch. 11 - Sections 11.211.4 11.1(The Triangle class) Design...Ch. 11 - (Subclasses of Account) In Programming Exercise...Ch. 11 - (Maximum element in ArrayList) Write the following...Ch. 11 - Prob. 11.5PECh. 11 - (Use ArrayList) Write a program that creates an...Ch. 11 - (Shuffle ArrayList) Write the following method...Ch. 11 - (New Account class) An Account class was specified...Ch. 11 - (Largest rows and columns) Write a program that...Ch. 11 - Prob. 11.10PECh. 11 - (Sort ArrayList) Write the following method that...Ch. 11 - (Sum ArrayList) Write the following method that...Ch. 11 - (Remove duplicates) Write a method that removes...Ch. 11 - (Combine two lists) Write a method that returns...Ch. 11 - (Area of a convex polygon) A polygon is convex if...Ch. 11 - Prob. 11.16PECh. 11 - (Algebra: perfect square) Write a program that...Ch. 11 - (ArrayList of Character) Write a method that...Ch. 11 - (Bin packing using first fit) The bin packing...
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
Rewrite the temperature conversion program of Section 1.2 to use a function for conversion.
C Programming Language
T F: A named constants value can be changed by a programming statement while the program is running.
Starting Out With Visual Basic (7th Edition)
When describing a system, explain why you may have to start the design of the system architecture before the re...
Software Engineering (10th Edition)
When displaying a Java applet, the browser invokes the _____ to interpret the bytecode into the appropriate mac...
Web Development and Design Foundations with HTML5 (9th Edition) (What's New in Computer Science)
On the planet Gzyx, a ball dropped from a height of 20 ft hits the ground in 2 s. If a ball is dropped from the...
Differential Equations: Computing and Modeling (5th Edition), Edwards, Penney & Calvis
Population Data If you have downloaded this books source code (the companion Web site is available at www.pears...
Starting Out with Java: From Control Structures through Objects (6th Edition)
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- public class LabProgram { public static void main(String args[]) { Course course = new Course(); String first; // first name String last; // last name double gpa; // grade point average first = "Henry"; last = "Cabot"; gpa = 3.5; course.addStudent(new Student(first, last, gpa)); // Add 1st student first = "Brenda"; last = "Stern"; gpa = 2.0; course.addStudent(new Student(first, last, gpa)); // Add 2nd student first = "Jane"; last = "Flynn"; gpa = 3.9; course.addStudent(new Student(first, last, gpa)); // Add 3rd student first = "Lynda"; last = "Robison"; gpa = 3.2; course.addStudent(new Student(first, last, gpa)); // Add 4th student course.printRoster(); } } // Class representing a student public class Student { private String first; // first name private String last; // last name private double gpa; // grade point average…arrow_forwardpleasearrow_forwardpublic class Number { private int num; public Number(int n) { num = n; } /* Type your code here */ public int getNum() { return num; } public void setNum(int n) { num = n; } public static void main(String [] args) { Number yourNum = new Number(723); System.out.print(yourNum); }}arrow_forward
- toString() and equals() Methods This lab will demonstrate how the toString() and equals() methods work when they are not overridden. Type up the code and submit the BOTH results. CODE public class ObjectToString( public static void main(String[] args) { ClassOne co new ClassOne(); ClassTwo ct = new ClassTwo(); } } public class Classone { System.out.println(co); System.out.println(ct); System.out.println(co.equals(ct)); public void printfle() { System.out.println("I am from ClassOne"); } public class ClassTwo ( public void printMe() { } System.out.println("I am from ClassTwo"); Run the program and notice the output.arrow_forward26. Assume the declaration of Exercise 24. A. Write the statements that derive the class dummyClass from class base as a private inheritance. (2 lines are { and }.) "A1 is { "A2 is "A3 is )) B. Determine which members of class base are private, protected, and public in class dummyClass. "B1 is dummyClass is a dearrow_forwardpublic class Cat extends Pet { private String breed; public void setBreed(String userBreed) { breed = userBreed; } public String getBreed() { return breed; }} public class Pet { protected String name; protected int age; public void setName(String userName) { name = userName; } public String getName() { return name; } public void setAge(int userAge) { age = userAge; } public int getAge() { return age; } public void printInfo() { System.out.println("Pet Information: "); System.out.println(" Name: " + name); System.out.println(" Age: " + age); } } import java.util.Scanner; public class PetInformation { public static void main(String[] args) { Scanner scnr = new Scanner(System.in); // create a generic Pet and a Cat Pet myPet = new Pet(); Cat myCat = new Cat(); // declare variables for pet and cat info String petName, catName, catBreed; int petAge,…arrow_forward
- 9 public class PictureViewer 10{ public static void main(String[] args) 11 12 // Step 2: Fix the syntax errors and submit it to Codecheck to pass the test. // Note: Do not add or remove any statements 13 // 14 15 // Do not change the semantics of each statement Do not add or remove any variables Do not add or remove any objects Magic numbers are allowed 16 17 18 // 19 // 20 // Create an object of Picture by loading an image Picture pic = Picture("starry_night.png"); 21 22 23 // Display the width and height System.out.println("Width : " + pic.getWidth()); System.out.println("Height: 24 25 + pic.getHeight()); %3D 26 27 // Increase the width by 50 on both sides and // increase the height by 40 on both sides. // Must use dw and dh when calling method grow(). int dw, dh = 40; pic.grow(dw, dh); 28 29 30 31 32 33 // Display the width and height System.out.println("Width : System.out.println("Height: 34 + pic.getWidth()); + pic.getHeight()); 35 36 37 // Draw the picture draw(); 38 39 40 //…arrow_forwardpublic class Main5 1 public static void main(String[] args) { inta= butjwant 0 833 please help me i am begineer ir avaarrow_forward3. private int X; public int z; public Secret () } 0 = X { public Secret(int a) } { public Secret (int a, int b) } { public String toString() '. + A + u = K ' + X + w count ! (qunoo + { public static void incrementY () } { 54. How many constructors are present in the class definition above? C. 2 d. 3 a. b. 1 c. Sets the value of x to 0 and the value of z to 1 d. There is no default constructor. 55. What does the default constructor do in the class definition above? a. Sets the value of x to 0 b. Sets the value of z to 1 56. Based on the class definition above, which of the following statements is illegal? Secret.incrementY(); b. Secret.count++; c. Secret.z++B d. None of thesearrow_forward
- public class StairViewer public static void main(String(] args) // Step 2: Create a rectangle and draw it as the // top step of the stair // location: (20, 10) // size: (20, 20) 18 // Step 3: Create a rectangle and draw it as the 19 // middle step of the stair 20 // location: below the top step, aligned on left // size: (40, 20) 21 22 23 24 // Step 4: Create a rectangle and draw it as the 25 // bottom step of the stair 26 // location: below the middle step, aligned on left // size: (60, 20) 27 28 29 30 } 31 32arrow_forwardpublic class Secret private int x; private static int y; public static int count; public int z; public Secret () } X ?t = 2 { public Secret (int a) } { public Secret (int a, int b) } { public String toString() return ("x = " count = " + count); { public static void incrementY () { { 54. How many constructors are present in the class definition above? C. 2 d. 3 b. 1 55. What does the default constructor do in the class definition above? a. Sets the value of x to 0 c. Sets the value of x to 0 and the value of z to 1 d. There is no default constructor. b. Sets the value of z to 1 56. Based on the class definition above, which of the following statements is illegal? Secret.incrementY (); b. Secret.count++3B a. c. Secret. 2++; d. None of these 13arrow_forward2- Consider the following program:public class Product{ private int price;public void setPrice(int theprice){price = thePrice;}}public class SpecialProduct extends Item{ private int discount;public void setDiscount(int theDiscount){discount = theDiscount;}}public class Main{public static void main(String[]args){SpecialProduct product = new SpecialProduct();}}Which of the following compiles without a problem? Why?a. product.discount = 20;b. product.setDiscount(20);c. product.setPrice(50);arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill EducationStarting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSONDigital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON
- C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSONDatabase Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage LearningProgrammable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education
6 Stages of UI Design; Author: DesignerUp;https://www.youtube.com/watch?v=_6Tl2_eM0DE;License: Standard Youtube License