Java Tutorial : Java unchecked exception(ArrayIndexOutOfBoundsException)

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Java Tutorial : Java unchecked exception(ArrayIndexOutOfBoundsException) 

UnCheckedExceptionDemo1.java

/*
 * If you compile this code, it would compile
 * successfully however when you will run it, it would
 * throw ArrayIndexOutOfBoundsException. That clearly shows that
 * unchecked exceptions are not checked at compile-time,
 * they are being checked at runtime.
 */

public class UnCheckedExceptionDemo1
{
    public static void main(String[] args)
    {
        int intArray[] = { 1, 2, 3 };

        /*
         * intArray has only 3 elements but I'm trying to
         * display the value of 6th element. It should throw
         * ArrayIndexOutOfBoundsException
         */
        System.out.println(intArray[5]);
        System.out.println("Normal flow...");
    }

}

Output

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 5
    at UnCheckedExceptionDemo1.main(UnCheckedExceptionDemo1.java:20)

UnCheckedExceptionDemo2.java

import java.util.Scanner;

public class UnCheckedExceptionDemo2
{
    public static void main(String[] args)
    {

        Scanner scanner = new Scanner(System.in);

        System.out.print("Enter the index: ");
        int index = scanner.nextInt();

        scanner.close();

        try
        {
            int intArray[] =
            { 155, 345, 999 };
            System.out.println(intArray[index]);
        }
        catch (ArrayIndexOutOfBoundsException arrayIndexOutOfBoundsException)
        {
            System.out.println("Enter the index value less "
                    + "than or equal to 2,\nbecause "
                    + "size of the array is 3");
        }
        System.out.println("Normal flow...");

    }

}

Output

Enter the index: 10
Enter the index value less than or equal to 2,
because size of the array is 3
Normal flow...

Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/ExceptionDemo_UncheckedExcecption_AIOBEXE_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/ExceptionDemo_UncheckedExcecption_AIOBEXE_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/510730a975724a569c9343782aaa0bffd03472e7/BasicJava/ExceptionDemo_UncheckedExcecption_AIOBEXE_App/?at=master

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