Hi i\'m currently taking an introduction to Java class. If anyone could help exp

Question

Hi i'm currently taking an introduction to Java class. If anyone could help explain to me what is wrong with my program in a easy way not to dificult. I'm having hard time calcualting the average for my five pets...Thanks !

package pp1_c00305169;

import java.util.Scanner;

public class Pp1_C00305169 {

public static void main(String[] args) {

Scanner reader = new Scanner(System.in);

//Declare array of Objects
Pets[] choices = new Pets[2];

//populate array
for (int i = 0; i < choices.length; i++) {
choices[i] = new Pets();
}

String name, type, breed, owner;

double age = 0, weight = 0;

for (Pets choice : choices) {
System.out.print("Enter Pet name: ");
name = reader.nextLine();
choice.setName(name);
System.out.print("Enter Pet Type (dog or cat): ");
type = reader.nextLine();
choice.setType(type);
System.out.print("Enter Pet Breed: ");
breed = reader.nextLine();
choice.setBreed(breed);
System.out.print("Enter Pet Age: ");
age = reader.nextDouble();
choice.setAge(age);
System.out.print("Enter Pet Weight: ");
weight = reader.nextDouble();
choice.setWeight(weight);
reader.nextLine();
System.out.print("Enter Pet Owner: ");
owner = reader.nextLine();
choice.setOwner(owner);
System.out.println();
}
  
for (Pets choice : choices) {
System.out.println(" " + choice.getName() + " type: " + choice.getType() + " breed: "
+ choice.getBreed() + " age: " + choice.getAge() + " weight: " + choice.getWeight() + " owner: "
+ choice.getOwner() + " ");
}
//call function
getWeight(choices);
averages(choices);

//need to demonstrate string
}
public static void getWeight(Pets[] choices){
Scanner reader = new Scanner(System.in);

for (Pets choice : choices) {
System.out.println("Does " + choice.getName()
+ " weight " + choice.getWeight() + "lbs.? (y/n): ");
String ba = reader.nextLine();

choice.getName();
choice.getWeight();

if (ba.equals("y")) {
System.out.println();
} else if (ba.equals("n")) {

System.out.println("Enter correct pet weight: ");

choice.setWeight(Double.parseDouble(reader.nextLine()));
}
}
}

public static void averages(Pets[] choices){

//get Average weight and age
double avg_weight = 1;
double avg_age = 1;

double weight;
double age;

//Calc Average ages and weights
for (Pets choice : choices)
{
avg_weight = choice.getWeight();
avg_age = choice.getAge();
}
// avg_weight /= choices.length;
// avg_age /= choices.length;
  
  

System.out.println("The average dog is " + (avg_age / (choices.length)) + " years old");

System.out.println("The average cat is " + (avg_age / (choices.length)) + " years old");

System.out.println("The average dog weights " + (avg_weight / (choices.length)) + " lbs.");

System.out.println("The average cat weights " + (avg_weight / (choices.length)) + " lbs.");

}

}

----------------------------------------------------------------------------------------------------------------

package pp1_c00305169;

public class Pets {

//Default Constructor
private String name = "na";

private String type = "ba";

private String breed = "ca";

private String owner = "da";

private double age; //in years

private double weight; //in pounds

public Pets() {
}

public Pets(String name, String type, String breed, double age, double weight, String owner) {
this.name = name;
this.type = type;
this.breed = breed;
this.age = age;
this.weight = weight;
this.owner = owner;

}

public String getName() {
return name;
}

public String getType() {
return type;
}

public String getBreed() {
return breed;
}

public double getAge() {
return age;
}

public double getWeight() {
return weight;
}

public String getOwner() {

return owner;

}

public void setName(String name) {
this.name = name;

}

public void setType(String type) {
this.type = type;

}

public void setBreed(String breed) {
this.breed = breed;
}

public void setAge(Double age) {
this.age = age;
checkWeight(age);
}

public void setWeight(Double weight) {
this.weight = weight;
checkWeight(weight);
}

public void setOwner(String owner) {
this.owner = owner;

}

public void checkWeight(double checkWeight) {

if (checkWeight > 0) {
weight = checkWeight;
}

  
}

@Override
public String toString() {
return "The avg dog is " + this.age + "years old" + " " +
"The avg cat is " + this.age + "years old" + " " +
"The avg do weights " + this.weight + "lbs." + " " +
"The avg cat weights " + this.weight + "lbs.";
}
}

Explanation / Answer

Pet.java

public class Pet {

//Declaring instance variables
private String name = "na";
private String type = "ba";
private String breed = "ca";
private String owner = "da";
private double age; // in years
private double weight; // in pounds

// Default Constructor
public Pet() {}

//Parameterized constructor
public Pet(String name, String type, String breed, double age,
double weight, String owner) {
this.name = name;
this.type = type;
this.breed = breed;
this.age = age;
this.weight = weight;
this.owner = owner;
}

//getters and setters
public String getName() {
return name;
}

public String getType() {
return type;
}

public String getBreed() {
return breed;
}

public double getAge() {
return age;
}

public double getWeight() {
return weight;
}

public String getOwner() {
return owner;
}

public void setName(String name) {
this.name = name;
}

public void setType(String type) {
this.type = type;
}

public void setBreed(String breed) {
this.breed = breed;
}

public void setAge(Double age) {
if (age < 0)
this.age = 0;
else
this.age = age;
}

public void setWeight(Double weight) {
if (weight < 0)
this.weight = 0;
else
this.weight = weight;
}

public void setOwner(String owner) {
this.owner = owner;
}

//toString method is used to display the contents of an object inside it
@Override
public String toString() {
return "Name=" + name + ", Type=" + type + ", Breed=" + breed + ", Owner=" + owner + ", Age=" + age + ", Weight=" + weight;
}

}

__________________

Pp1_C00305169.java

import java.util.Scanner;

public class Pp1_C00305169 {

static Pet pets[]=null;

public static void main(String[] args) {

//Declaring variables

String name ,type ,breed ,owner;

double age, weight;

  

pets=new Pet[5];

/*

* Creating an Scanner class object which is used to get the inputs

* entered by the user

*/

Scanner sc = new Scanner(System.in);

//Geetting each pet information and storing in Pet class array

for(int i=0;i<pets.length;i++)

{

System.out.println("__Pet#"+(i+1)+"__");

System.out.print("Enter Name:");

name=sc.nextLine();

System.out.print("Enter Type:");

type=sc.nextLine();

System.out.print("Enter Breed:");

breed=sc.nextLine();

System.out.print("Enter Owner:");

owner=sc.nextLine();

System.out.print("Enter Age:");

age=sc.nextDouble();

System.out.print("Enter Weight:");

weight=sc.nextDouble();

sc.nextLine();

//Creating an Pet class Obejct by passing user entered inputs

pets[i]=new Pet(name, type, breed, age, weight, owner);

}

System.out.println("___Displaying Pets Info___");

//Displaying each Pet info

for(int i=0;i<pets.length;i++)

{

System.out.println(pets[i]);

}

//Calling the Methods

double avgAge=calAverageAge();

double avgWeight=calAverageWeight();

//Displaying the average weight and Age

System.out.println("The Average Age of "+pets.length+" is :"+avgAge);

System.out.println("The Average Weight of "+pets.length+" is :"+avgWeight);

}

//This method will calculate the Average Weight

private static double calAverageWeight() {

double tot=0.0,avg=0.0;

for(int i=0;i<pets.length;i++)

{

tot+=pets[i].getAge();

}

return tot/pets.length;

}

//This method will calculate the Average Age

private static double calAverageAge() {

double tot=0.0,avg=0.0;

for(int i=0;i<pets.length;i++)

{

tot+=pets[i].getWeight();

}

return tot/pets.length;

}

}

____________________

Output:

__Pet#1__
Enter Name:Max
Enter Type:xxxx
Enter Breed:yyyy
Enter Owner:John
Enter Age:3
Enter Weight:8
__Pet#2__
Enter Name:Mikcy
Enter Type:xzx
Enter Breed:xsx
Enter Owner:Sachin
Enter Age:4
Enter Weight:12
__Pet#3__
Enter Name:Tommy
Enter Type:xxzx
Enter Breed:xyzx
Enter Owner:Rick
Enter Age:2
Enter Weight:6
__Pet#4__
Enter Name:Honey
Enter Type:xsxs
Enter Breed:xzxz
Enter Owner:Rob
Enter Age:5
Enter Weight:6
__Pet#5__
Enter Name:Leo
Enter Type:CSXX
Enter Breed:DCDD
Enter Owner:Rahul
Enter Age:5
Enter Weight:15

___Displaying Pets Info___
Name=Max, Type=xxxx, Breed=yyyy, Owner=John, Age=3.0, Weight=8.0

Name=Mikcy, Type=xzx, Breed=xsx, Owner=Sachin, Age=4.0, Weight=12.0

Name=Tommy, Type=xxzx, Breed=xyzx, Owner=Rick, Age=2.0, Weight=6.0

Name=Honey, Type=xsxs, Breed=xzxz, Owner=Rob, Age=5.0, Weight=6.0

Name=Leo, Type=CSXX, Breed=DCDD, Owner=Rahul, Age=5.0, Weight=15.0

The Average Age of 5 is :9.4
The Average Weight of 5 is :3.8

_____________Could you rate me well.Plz .Thank You

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