Starting Out with Java: From Control Structures through Data Structures (3rd Edition)
3rd Edition
ISBN: 9780134038179
Author: Tony Gaddis, Godfrey Muganda
Publisher: PEARSON
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Textbook Question
Chapter 18.1, Problem 18.2CP
When ArrayList is used as a non-generic class, why must you use the cast operator with the get method?
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public class Product {
private String name;
private double cost;
public Product(String n, double c) {
name=n;
cost=c;
}
public String getName() {
return name;
On the left is code for a class called Product.
Fill in the blanks in the code on the right in order to create three appropriate Product
instances and add them to the cart ArrayList. Use the output of the code, shown
below the code, to guide you.
}
public double getCost() {
return cost;
}
public String toString() {
return (name + "$" + cost);
}
public static void addProducts (ArrayList c) {
add(new Product("Shampoo", 13.89));
add(new Product("Bread",4.99));
add(new Product("Cereal", 7.49));
}
public static void main(String[] args) {
ArrayList cart = new ArrayList();
ddProducts (cart);
for (Product p : cart) {
System.out.println(p);
}
}
Output:
Shampoo $13.89
Bread $4.99
Cereal $7.49
Q#: Create a class Book that has the following data members:
Name
ISBN
Author
Edition
Create a constructor to initialize all data members. Write a method PrintInfo to print information containing the fields of class.
Write another class called Library that must contain a Main method. Inside Main, make at least 10 instances of Book, stored in an array (or list) of type Book. Call the method printInfo() for each instance. (Hint: use of foreach loop will be beneficial).
Complete the Kennel class by implementing the following methods:
addDog(Dog dog)
findYoungestDog() method, which returns the Dog object with the lowest age in the kennel.
Assume that no two dogs have the same age.
Given classes:
Class LabProgram contains the main method for testing the program.
Class Kennel represents a kennel, which contains an array of Dog objects as a dog list. (Type your code in here.)
Class Dog represents a dog, which has three fields: name, breed, and age. (Hint: getAge() returns a dog's age.)
For testing purposes, different dog values will be used.
Ex. For the following dogs:
Rex Labrador 3.5 Fido Healer 2.0 Snoopy Beagle 3.2 Benji Spaniel 3.9
the output is:
Youngest Dog: Fido (Healer) (Age: 2.0)
Chapter 18 Solutions
Starting Out with Java: From Control Structures through Data Structures (3rd Edition)
Ch. 18.1 - Prob. 18.1CPCh. 18.1 - When ArrayList is used as a non-generic class, why...Ch. 18.1 - Suppose we use the following statement to...Ch. 18.1 - Assume we have used the statement shown in...Ch. 18.2 - Prob. 18.5CPCh. 18.2 - Prob. 18.6CPCh. 18.2 - Prob. 18.7CPCh. 18.2 - Prob. 18.8CPCh. 18.3 - Prob. 18.9CPCh. 18.3 - Prob. 18.10CP
Ch. 18.3 - Prob. 18.11CPCh. 18.3 - Prob. 18.12CPCh. 18.3 - Prob. 18.13CPCh. 18.3 - Prob. 18.14CPCh. 18.4 - Prob. 18.15CPCh. 18.5 - Prob. 18.16CPCh. 18.5 - Prob. 18.17CPCh. 18.6 - Prob. 18.18CPCh. 18.6 - Prob. 18.19CPCh. 18.6 - Prob. 18.20CPCh. 18.8 - Prob. 18.21CPCh. 18.8 - Prob. 18.22CPCh. 18.9 - Prob. 18.23CPCh. 18.9 - During the process of erasure, when the compiler...Ch. 18.9 - Prob. 18.25CPCh. 18 - Prob. 1MCCh. 18 - Prob. 2MCCh. 18 - Look at the following method header: void...Ch. 18 - Look at the following method header: void...Ch. 18 - Look at the following method header: void...Ch. 18 - Look at the following method header: void...Ch. 18 - Prob. 7MCCh. 18 - Prob. 8MCCh. 18 - Prob. 9MCCh. 18 - The process used by the Java compiler to remove...Ch. 18 - True or False: It is better to discover an error...Ch. 18 - Prob. 12TFCh. 18 - True or False: Type parameters must be single...Ch. 18 - Prob. 14TFCh. 18 - Prob. 15TFCh. 18 - True or False: You cannot create an array of...Ch. 18 - Prob. 17TFCh. 18 - Prob. 18TFCh. 18 - Prob. 1FTECh. 18 - Assume the following is a method header in a...Ch. 18 - public class MyClassT { public static void...Ch. 18 - public class PointT extends Number super Integer {...Ch. 18 - Assume there is a class named Customer. Write a...Ch. 18 - Assume names references an object of the...Ch. 18 - Prob. 3AWCh. 18 - Prob. 4AWCh. 18 - Prob. 5AWCh. 18 - Prob. 6AWCh. 18 - Prob. 7AWCh. 18 - Prob. 1SACh. 18 - Look at the following method header: public T...Ch. 18 - Prob. 3SACh. 18 - Do generic types exist at the bytecode level?Ch. 18 - Prob. 5SACh. 18 - When the compiler encounters a class, interface,...Ch. 18 - Prob. 1PCCh. 18 - Prob. 2PCCh. 18 - Prob. 3PCCh. 18 - Prob. 4PCCh. 18 - Prob. 5PCCh. 18 - Prob. 6PCCh. 18 - Prob. 7PC
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