what are the examples of self defined exceptions?

Question

java relatex

Answer 1

java

Answer 2

see the below:

class WrongAnswer extends Exception {
public WrongAnswer(String message){
super(message);
}
}

class Question{
public void isCorrect(String answer) throws WrongAnswer {

if (answer == "bird"){
System.out.println("Correct!");
}else {
throw new WrongAnswer(answer + " is a wrong answer");
}
}
}

public class Program
{
public static void main(String[] args) {

Question q = new Question();

try{
q.isCorrect("Monkey");
} catch(WrongAnswer wa){
System.out.println(wa.getMessage());
}

}
}