CustomException.java

//* Create custom exception and handle the events of different types
//! In Java there are three inbuilt method for handling exceptions
//? 1. toString()
//? 2. printStackTrace()
//? 3. getMessage()

import java.util.Scanner;

class MyClass extends Exception {
    @Override
    public String toString() { // This method we will be overriding
        // ! This method will run when you use sout (e)
        // TODO Auto-generated method stub
        return "I am toString() Method.";
    }

    @Override
    public String getMessage() { // This method we will be overriding
        // ! This method will print the exception message
        // TODO Auto-generated method stub
        return "you cannot drive the vehicle! and this is the custom exception.";
    }
}

public class CustomException {
    public static void main(String[] args) {
        // ? Create instance of the Scanner class
        Scanner sc = new Scanner(System.in);

        // ? Get the input number from the user
        int num;
        System.out.print("Enter the number here : ");
        num = sc.nextInt();
        System.out.println();

        // ? Now handle the exception
        if (num < 18) {
            try {
                throw new MyClass(); // Throw keyword is used to explicitly throw an exception
            } catch (Exception e) {
                // TODO: handle exception
                System.out.println(e.getMessage());
                e.printStackTrace(); // This will show where the error it is and which method is called
                System.out.println(e);
            }
        } else {
            System.out.println("You can deive vehicle!");
        }

        sc.close();
    }
}