What is the output of the following code? Explain each line of the console output in your own words. (HINT: if there are errors, please explain why the errors occur) import java.util.ArrayList; public class Pet { public void goToVet(){ System.out.println("My Pet needs to go to Vet ..."); } public static void main(String args[]){ Hamster pug = new Hamster(); Pet sally = new Pet(); Pet loki = new Hamster(); Object sunny = new Object(); Object joy = new Pet(); Object mini = new Hamster(); ArrayList myList = new ArrayList<>(); myList.add(pug); myList.add(sally); myList.add(loki); myList.add(sunny); myList.add(joy); myList.add(mini); myList.forEach(i -> { if (i instanceof Hamster) { System.out.println("My Pet is cute: so " + (((Hamster) i).cute()) + "! "); ((Hamster) i).goToVet(); } else if (i instanceof Pet) ((Pet) i).goToVet(); else System.out.println("This is not a Pet"); }); } } class Hamster extends Pet { public void goToVet(){ System.out.println("My Hamster needs to go to Vet ..."); } public boolean cute(){ return true; } }
What is the output of the following code? Explain each line of the console output in your own words. (HINT: if there are errors, please explain why the errors occur) import java.util.ArrayList; public class Pet { public void goToVet(){ System.out.println("My Pet needs to go to Vet ..."); } public static void main(String args[]){ Hamster pug = new Hamster(); Pet sally = new Pet(); Pet loki = new Hamster(); Object sunny = new Object(); Object joy = new Pet(); Object mini = new Hamster(); ArrayList myList = new ArrayList<>(); myList.add(pug); myList.add(sally); myList.add(loki); myList.add(sunny); myList.add(joy); myList.add(mini); myList.forEach(i -> { if (i instanceof Hamster) { System.out.println("My Pet is cute: so " + (((Hamster) i).cute()) + "! "); ((Hamster) i).goToVet(); } else if (i instanceof Pet) ((Pet) i).goToVet(); else System.out.println("This is not a Pet"); }); } } class Hamster extends Pet { public void goToVet(){ System.out.println("My Hamster needs to go to Vet ..."); } public boolean cute(){ return true; } }
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
What is the output of the following code? Explain each line of the console output in your
own words. (HINT: if there are errors, please explain why the errors occur)
import java.util.ArrayList;
public class Pet {
public void goToVet(){
System.out.println("My Pet needs to go to Vet ...");
}
public static void main(String args[]){
Hamster pug = new Hamster();
Pet sally = new Pet();
Pet loki = new Hamster();
Object sunny = new Object();
Object joy = new Pet();
Object mini = new Hamster();
ArrayList<Object> myList = new ArrayList<>();
own words. (HINT: if there are errors, please explain why the errors occur)
import java.util.ArrayList;
public class Pet {
public void goToVet(){
System.out.println("My Pet needs to go to Vet ...");
}
public static void main(String args[]){
Hamster pug = new Hamster();
Pet sally = new Pet();
Pet loki = new Hamster();
Object sunny = new Object();
Object joy = new Pet();
Object mini = new Hamster();
ArrayList<Object> myList = new ArrayList<>();
myList.add(pug);
myList.add(sally);
myList.add(loki);
myList.add(sunny);
myList.add(joy);
myList.add(mini);
myList.forEach(i -> {
if (i instanceof Hamster) {
System.out.println("My Pet is cute: so " + (((Hamster) i).cute())
+ "! ");
((Hamster) i).goToVet();
}
else if (i instanceof Pet)
((Pet) i).goToVet();
else
System.out.println("This is not a Pet");
});
}
}
class Hamster extends Pet {
public void goToVet(){
System.out.println("My Hamster needs to go to Vet ...");
}
public boolean cute(){
return true;
}
}
myList.add(loki);
myList.add(sunny);
myList.add(joy);
myList.add(mini);
myList.forEach(i -> {
if (i instanceof Hamster) {
System.out.println("My Pet is cute: so " + (((Hamster) i).cute())
+ "! ");
((Hamster) i).goToVet();
}
else if (i instanceof Pet)
((Pet) i).goToVet();
else
System.out.println("This is not a Pet");
});
}
}
class Hamster extends Pet {
public void goToVet(){
System.out.println("My Hamster needs to go to Vet ...");
}
public boolean cute(){
return true;
}
}
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