Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
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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
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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
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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
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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 (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...
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