Every Java Programmer is familiar with NullPointerException. It can crash your code. And it is very hard to avoid it
without using too many null checks. So, to overcome this, Java 8 has introduced a new class Optional
in java.util package. It can help in writing a neat code without using too many null checks.
By using Optional, we can specify alternate values to return or alternate code to run. This makes the code more readable because the facts which were hidden are now visible to the developer.