Update 05-optionals.md

shekhargulati · web-flow · commit baf3dd40a32c · 2019-02-23T22:28:37.000+05:30
diff --git a/05-optionals.md b/05-optionals.md
@@ -1,4 +1,4 @@
-Optionals
+Optionals [![TimeToRead](http://ttr.myapis.xyz/ttr.svg?pageUrl=https://github.com/shekhargulati/java8-the-missing-tutorial/blob/master/05-optionals.md)](http://ttr.myapis.xyz/)
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 Every Java developer, whether beginner, novice, or seasoned, has in their lifetime experienced `NullPointerException`. We all have wasted or spent many hours trying to fix bugs caused by `NullPointerException`. According to `NullPointerException`'s JavaDoc, ***NullPointerException is thrown when an application attempts to use null in a case where an object is required.***. This means if we invoke a method or try to access a property on ***null*** reference, then our code will explode and `NullPointerException` is thrown. In this chapter, you will learn how to write null-free code using Java 8's `Optional`.

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`1`		`-Optionals`
	`1`	`+Optionals [![TimeToRead](http://ttr.myapis.xyz/ttr.svg?pageUrl=https://github.com/shekhargulati/java8-the-missing-tutorial/blob/master/05-optionals.md)](http://ttr.myapis.xyz/)`
`2`	`2`	`----`
`3`	`3`
`4`	`4`	Every Java developer, whether beginner, novice, or seasoned, has in their lifetime experienced `NullPointerException`. We all have wasted or spent many hours trying to fix bugs caused by `NullPointerException`. According to `NullPointerException`'s JavaDoc, *NullPointerException is thrown when an application attempts to use null in a case where an object is required.. This means if we invoke a method or try to access a property on null* reference, then our code will explode and `NullPointerException` is thrown. In this chapter, you will learn how to write null-free code using Java 8's `Optional`.