Program Explanation Program: Filename: “Pet.java” //Import required package import java.io.*; import java.util.*; //Define "Pet" class public class Pet implements Serializable { //Declare required variables private String name; private int age; //in years private double weight;//in pounds /* Method definition for "readPetInputs" */ public void readPetInputs() { //Create object for scanner class Scanner userInput = new Scanner(System.in); //Display prompt statement for pet's name System.out.print("Enter pet's name: "); //Read pet's name from user name = userInput.nextLine(); //Display prompt statement for pet's age System.out.print("Enter pet's age: "); //Read pet's age from user age = userInput.nextInt(); /* If age is less than "0", then */ if(age < 0) { //Display error message System.out.println("Error: Negative age."); System.exit(0); } //Display prompt statement for pet's weight System.out.print("Enter pet's weight: "); //Read pet's weight from user weight = userInput.nextDouble(); /* If weight is less than "0", then */ if(weight < 0) { //Display error message System.out.println("Error: Negative weight."); System.exit(0); } } /* Method definition for "toString" */ public String toString() { //Returns given result return ("Name: " + name + "\n" + "Age: " + age + " years " + "\n" + "Weight: " + weight + " pounds" + "\n"); } /* parameterized constructor for "Pet" class with three arguments */ public Pet(String initialName, int initialAge, double initialWeight) { /* This constructor is same as in Listing 6.1 of chapter 6 */ name = initialName; if ((initialAge < 0) || (initialWeight < 0)) { System.out.println("Error: Negative age or weight."); System.exit(0); } else { age = initialAge; weight = initialWeight; } } /* Set pet values */ public void setPet(String newName, int newAge, double newWeight) { /* It is same as in Listing 6.1 of chapter 6 */ name = newName; if ((newAge < 0) || (newWeight < 0)) { System.out.println("Error: Negative age or weight."); System.exit(0); } else { age = newAge; weight = newWeight; } } /* Parameterized constructor for "Pet" class with argument of only pet's name */ public Pet(String initialName) { name = initialName; age = 0; weight = 0; } /* Set method for pet's name */ public void setName(String newName) { name = newName; //age and weight are unchanged. } /* Parameterized constructor for "Pet" class with argument of only pet's age */ public Pet(int initialAge) { /* This constructor is same as in Listing 6.1 of chapter 6 */ name = "No name yet."; weight = 0; if (initialAge < 0) { System.out.println("Error: Negative age."); System.exit(0); } else age = initialAge; } /* Set method for pet's age */ public void setAge(int newAge) { if (newAge < 0) { System.out.println("Error: Negative age."); System.exit(0); } else age = newAge; //name and weight are unchanged. } /* Parameterized constructor for "Pet" class with argument of only pet's weight */ public Pet(double initialWeight) { /* This constructor is same as in Listing 6.1 of chapter 6 */ name = "No name yet"; age = 0; if (initialWeight < 0) { System.out.println("Error: Negative weight."); System.exit(0); } else weight = initialWeight; } /* Set method for pet's weight */ public void setWeight(double newWeight) { if (newWeight < 0) { System.out.println("Error: Negative weight."); System.exit(0); } else weight = newWeight; //name and age are unchanged. } //Default constructor for "Pet" class public Pet( ) { name = "No name yet."; age = 0; weight = 0; } //Get method for pet's name public String getName( ) { return name; } //Get method for pet's age public int getAge( ) { return age; } //Get method for pet's weight public double getWeight( ) { return weight; } //Method definition of "writeOutput public void writeOutput( ) { /* This method is same as the Listing 6.1 of chapter 6 */ System.out.println("Name: " + name); System.out.println("Age: " + age + " years"); System.out.println("Weight: " + weight + " pounds"); } } Filename: “PetSortedWeightToFileTest.java” //Import required package import java.util.*; import java.io.*; //Define "PetSortedWeightToFileTest" class public class PetSortedWeightToFileTest { //Define main function public static void main(String[] args) { //Create object for "Pet" class Pet p = null; //Declare required variable String input_filename; String output_filename; //Set input file and output file to "null" Scanner input_file = null; PrintWriter output_file = null; //Create object for scanne class Scanner userInput = new Scanner(System...

Java: An Introduction to Problem Solving and Programming (8th Edition)

8th Edition

ISBN: 9780134462035

Author: Walter Savitch

Publisher: PEARSON

See similar textbooks

Concept explainers

Variables and Constant

Constants and variables are widely used in mathematical equations and expressions. They are also commonly found in the domain of programming, where each language has its own way to differentiate between a constant and a variable. Since they have all sort…

Videos

Question

Chapter 12, Problem 3PP

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Chapter 12, Problem 2PP

Chapter 12, Problem 9PP

Students have asked these similar questions

(25 points) What are the use cases in which public key encryption would be useless? In light of what we discussed in class. would the internet be where it is today without the COIS-4370H-A-F01-2025FA-OSH Computer & Info Security Ords. City any sources you use. Remember to frame your answer in light of what was discussed in class.

2) You have learned in class the major steps that occur when a laptop requests a webpage after connecting to a network. In this assignment, you will apply that knowledge to another scenario: opening and playing a YouTube video that resides in Google's data-center infrastructure. Explain, in as much detail as you can, all the steps involved from your device's initial connection to the home/university network, to DNS resolution, routing across multiple networks, reaching Google's servers, and finally receiving the video data. To support your explanation, use tools such as ipconfig, nslookup, and tracert on your own computer, as well as any online IP-lookup tools of your choice. For each stage, include relevant information such as IP addresses, MAC addresses, router hops, and any other details you can gather. You are not expected to find every piece of information, but be as comprehensive as possible based on what you have learned in class, and justify your reasoning with screenshots from…

Please no use of AI

Chapter 12 Solutions

Java: An Introduction to Problem Solving and Programming (8th Edition)

Chapter 12.1, Problem 1STQ Chapter 12.1, Problem 2STQ Chapter 12.1, Problem 3STQ Chapter 12.1, Problem 4STQ Chapter 12.1, Problem 5STQ Chapter 12.1, Problem 6STQ Chapter 12.1, Problem 7STQ Chapter 12.1, Problem 8STQ Chapter 12.1, Problem 9STQ Chapter 12.1, Problem 11STQ

Additional Engineering Textbook Solutions

Find more solutions based on key concepts

An error which occurs on the source code of a program is referred to as a “syntax error” because the computer p...

Starting Out with Programming Logic and Design (5th Edition) (What's New in Computer Science)

The cutting force.

Degarmo's Materials And Processes In Manufacturing

To calculate the present value of an investment after the user gives its amount, rate of interest, and total ye...

Introduction To Programming Using Visual Basic (11th Edition)

The portion of program that refers to the declared entity by its name is referred as scope. It refers to the li...

Java How to Program, Early Objects (11th Edition) (Deitel: How to Program)

The statement defines and customizes the terminology which is to be used later in the program such as names for...

Computer Science: An Overview (13th Edition) (What's New in Computer Science)

An error which occurred on the source code of a program is referred as “syntax error”; because the computer pro...

Starting Out with C++ from Control Structures to Objects (9th 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.