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...

Java: An Introduction to Problem Solving and Programming (7th Edition)

7th Edition

ISBN: 9780133766264

Author: Walter Savitch

Publisher: PEARSON

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Given a relation schema R = (A, B, C, D, E,G) with a set of functional dependencies F {ABCD BC → DE B→ D D→ A}. (a) Show that R is not in BCNF using the functional dependency A → BCD. (b) Show that AG is a superkey for R (c) Compute a canonical cover Fc for the set of functional dependencies F. Show your work. (d) Give a 3NF decomposition of R based on the canonical cover found in (c). Show your work. (e) Give a BCNF decomposition of R using F. Show your work.

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Java: An Introduction to Problem Solving and Programming (7th Edition)

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