Dinosaurs! Design a class called Dinosaur. A dinosaur has a time when it lived,
ID: 3906876 • Letter: D
Question
Dinosaurs! Design a class called Dinosaur. A dinosaur has a time when it lived, and an ID (an integer that represents each dinosaur.. Dinosaur should implement comparable and compare their IDs.
Saurischia and Ornithiscia are subclasses of Dinosaur. Theropod and Sauropod are subclasses of Saurischia. Thyreophora and Cerapod are subclasses of Ornithiscia. Override the toString method to give a description of the dinosaur (its parent classes and a notable fact).
Create a driver program that instantiates an array of at least one Theropod, Sauropod, Thyreophora, and Ceropod, sort and output the array so each dinosaur is sorted by ID and outputs their ID, description, notable fact and what they eat.
Explanation / Answer
Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts. Thanks
// Dinosaur.java
public class Dinosaur implements Comparable<Dinosaur> {
//attributes
private String timeLived;
private int ID;
//constructor
public Dinosaur(String timeLived, int iD) {
this.timeLived = timeLived;
ID = iD;
}
//getters and setters
public String getTimeLived() {
return timeLived;
}
public void setTimeLived(String timeLived) {
this.timeLived = timeLived;
}
public int getID() {
return ID;
}
public void setID(int iD) {
ID = iD;
}
@Override
public int compareTo(Dinosaur d) {
//compares by id
if (this.ID < d.ID) {
return -1;
} else {
return 1;
}
}
@Override
public String toString() {
//returning id and time lived
return "ID: " + ID + ", time lived: " + timeLived;
}
}
// Saurischia.java
public class Saurischia extends Dinosaur {
public Saurischia(String timeLived, int iD) {
//passing values to super class
super(timeLived, iD);
}
@Override
public String toString() {
return "ID: "
+ getID()
+ ", time lived: "
+ getTimeLived()
+ ", ["
+ getClass().getName()
+ "], notable fact: 'reptile-hipped', food type: carnivorous, parent class: "
+ getClass().getSuperclass().getName();
}
}
// Ornithiscia.java
public class Ornithiscia extends Dinosaur {
public Ornithiscia(String timeLived, int iD) {
//passing values to super class
super(timeLived, iD);
}
@Override
public String toString() {
return "ID: "
+ getID()
+ ", time lived: "
+ getTimeLived()
+ ", ["
+ getClass().getName()
+ "], notable fact: 'bird-hipped', food type: Omnivorous, parent class: "
+ getClass().getSuperclass().getName();
}
}
// Theropod.java
public class Theropod extends Saurischia {
public Theropod(String timeLived, int iD) {
//passing values to super class
super(timeLived, iD);
}
@Override
public String toString() {
return "ID: " + getID() + ", time lived: " + getTimeLived() + ", ["
+ getClass().getName()
+ "], notable fact: 'hollow bones and three-toed limbs'"
+ ", food type: carnivorous, parent class: "
+ getClass().getSuperclass().getName();
}
}
// SauroPod.java
public class SauroPod extends Saurischia {
public SauroPod(String timeLived, int iD) {
//passing values to super class
super(timeLived, iD);
}
@Override
public String toString() {
return "ID: " + getID() + ", time lived: " + getTimeLived() + ", ["
+ getClass().getName() + "], notable fact: 'very long necks', "
+ "food type: herbivorous, parent class: "
+ getClass().getSuperclass().getName();
}
}
// Thyreophora.java
public class Thyreophora extends Ornithiscia {
public Thyreophora(String timeLived, int iD) {
//passing values to super class
super(timeLived, iD);
}
@Override
public String toString() {
return "ID: " + getID() + ", time lived: " + getTimeLived() + ", ["
+ getClass().getName()
+ "], notable fact: 'presence of body armor', "
+ "food type: herbivorous, parent class: "
+ getClass().getSuperclass().getName();
}
}
// Cerapod.java
public class Cerapod extends Ornithiscia {
public Cerapod(String timeLived, int iD) {
//passing values to super class
super(timeLived, iD);
}
@Override
public String toString() {
return "ID: "
+ getID()
+ ", time lived: "
+ getTimeLived()
+ ", ["
+ getClass().getName()
+ "], notable fact: 'thicker enamel on the inside of their lower teeth',"
+ " food type: herbivorous, parent class: " + getClass().getSuperclass().getName();
}
}
// Driver.java
import java.util.Arrays;
public class Driver {
public static void main(String[] args) {
/**
* Creating an array of Dinosaurs and initializing with different types
* of dinos
*/
Dinosaur dinos[] = new Dinosaur[4];
dinos[0] = new Theropod("250 million years ago", 72);
dinos[1] = new Cerapod("240 million years ago", 12);
dinos[2] = new SauroPod("300 million years ago", 34);
dinos[3] = new Thyreophora("200 million years ago", 99);
/**
* sorting by id
*/
Arrays.sort(dinos);
/**
* displaying each of them
*/
for(int i=0;i<dinos.length;i++){
System.out.println(dinos[i]);
}
}
}
/*OUTPUT*/
ID: 12, time lived: 240 million years ago, [Cerapod], notable fact: 'thicker enamel on the inside of their lower teeth', food type: herbivorous, parent class: Ornithiscia
ID: 34, time lived: 300 million years ago, [SauroPod], notable fact: 'very long necks', food type: herbivorous, parent class: Saurischia
ID: 72, time lived: 250 million years ago, [Theropod], notable fact: 'hollow bones and three-toed limbs', food type: carnivorous, parent class: Saurischia
ID: 99, time lived: 200 million years ago, [Thyreophora], notable fact: 'presence of body armor', food type: herbivorous, parent class: Ornithiscia
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