UML diagram of the class:

The below class diagram is type of UML(Unified Modeling Language) represents the static structural diagram which is used in describing the system structure with the name of the class followed by their attributes, methods and the relationship that is laid with the objects of the class that is created:

Program code:

//import the required packages

import java.util.*;

//class definition

public class Pet

{

// declare the necessary variables

private String pName;

private String pAnimal;

private int pAge;

// constructor to set the initial values

Pet(String name, String animal, int age)

{

//assign the values

this.pName = name;

this.pAnimal = animal;

this.pAge = age;

}

//Method definition for setName

public void setName(String name)

{

//assign name

this.pName = name;

}

//Method definiton for setAnimal

public void setAnimal(String name)

{

//assign the type

this.pAnimal = name;

}

//Method definition for setAge

public void setAge(int age)

{

//assign the age

this.pAge = age;

}

//Method definition for getName

public String getName()

{

//return the name

return pName;

}

//Method definition for getAnimal

public String getAnimal()

{

//return the type

return pAnimal;

}

//Method definition for getAge

public int getAge()

{

//return the age

return pAge;

}

//method defintion to assign the value and display

@Override

public String toString()

{

//return the value

return String...