I have to make a program which is supposed to receive an input for pet information and output it in a specific way.  

Normally this would be a cake and take 10 minutes, but we just moved into OOP and I am having some trouble figuring out what to put in the mutator on the driver. 

Driver:

```
import java.util.HashSet;
import java.util.Set;

public class JMPets {
    private String petType; 
    private String petName; 
    private int petAge; 
    private double petWeight; 
    boolean isMale; 

    public void setType(String petType)
    {
        this.petType = petType; 
    }
    public void setName(String petName)
    {
        this.petName = petName; 
    }
    public void setAge (int petAge)
    {
        this.petAge = petAge; 
    }
    public void setWeight(double petWeight)
    {
        this.petWeight = petWeight; 
    }
    public String getType()
    {
        return petType; 
    }
    public String getName()
    { 
        return petName; 
    }
    public int getAge()
    { 
        return petAge; 
    }
    public double getWeight()
    {
        return petWeight;         
    }

    public void set(String petType, String petName, int petAge, 
           double petWeight)
    {
        //WHAT DO I PUT HERE

    }

}

```

---

```
import java.util.Scanner;
public class JMUnit6 {

    public static void main(String[] args) {

    JMPets myPet1 = new JMPets(); 
    JMPets myPet2 = new JMPets(); 
    JMPets mypet3 = new JMPets(); 
    Scanner stdIn = new Scanner(System.in); 
    System.out.println("Welcome to the Java Pet Tracker");
    System.out.println("Please enter the type of Pet #1:");
    String petType = stdIn.nextLine(); 

    System.out.println("Please enter the name of Pet #1:"); 
    String petName = stdIn.nextLine(); 

    System.out.println("Please enter the age of " +petName+":");
    int petAge = stdIn.nextInt(); 

    System.out.println("Please enter the weight of "+petName+":");
    double petWeight = stdIn.nextDouble(); 

    System.out.println("Is "+petName+" Male?:");
    boolean isMale = stdIn.nextBoolean(); 

    myPet1.set(petType, petName, petAge, petWeight); 

    System.out.println(myPet1.getType());
    System.out.println(myPet1.getName()); 
    System.out.println(myPet1.getAge());
    System.out.println(myPet1.getWeight()); 

    }//end main
}//end class JMUnit6

```

The only output I get is null null 0 0.0.