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In this video of code decode we have covered Java 8 Optional class Interview Questions and Answers for freshers and experienced
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Q) What is Optional? Why and how can you use it? Optional Class was introduced in java 8 to to avoid NullPointerException in java.
NullPointerException is a term that every Java programmer is familiar with. It has the potential to cause your code to crash. It's also difficult to avoid without employing a lot of null tests. To address this, Java 8 added a new class Optional to the java.util package. It can aid in the creation of clean code that avoids the use of excessive null checks. We can define alternate values to return or alternate code to run by using Optional. This makes the code more readable because the developer can now see the previously hidden truths.
Optional is a new class in the java.util package that was introduced in Java 8. It's used to show whether a value is present or not. The key benefit of this new construct is that it eliminates the need for excessive null checks and NullPointerException. It prevents NullPointerExceptions at runtime and aids in the development of clean and tidy Java APIs and applications. It's a Container that can only hold one value, just like Collections and arrays. Let's have a look at some examples of this new construct.
Java 8's Benefits Optional:
Null checks aren't necessary. NullPointerException is no longer thrown at runtime. We can create APIs that are neat and tidy. There will be no more. Code for a boiler plate
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0:00 Introduction 1:28 Why Optional Objects 6:45 Checking Value Presence 11:45 Creating Optional Objects