Gain insights into Java 8's new features: lambdas, Stream API, Functional Interfaces, Collections improvements, Memory Management, and Date & Time API to enhance productivity and code quality.

Java 8 has introduced a ton of features and enhancements to boost developer productivity, while making your code faster, more concise, and more readable. 
In this course, you will learn about lambdas, Java Stream API, Functional Interfaces, as well as lots of other new improvements related to Collections, Memory Management, Date & Time API. 
After completing this course, you’ll be well versed in all the functionality of Java 8 and be ready to utilize these new features in your own code.

Java 8 for Experienced Developers: Lambdas, Stream API & Beyond

In the previous lesson, we looked at the `Optional<T>` class. You learned what an `Optional` is and how to create it.

In this lesson, we will look at all the operations that we can perform using an `Optional`. 

Below is the list of methods available in the `Optional` class.

# `1) isPresent()`

The `isPresent()` method is used to check if the optional contains a value or if it is null.

The method `isPresent()` returns the value true in case the id of the `Optional` objects contains a non-null value. Otherwise, it returns a false value.

Optional<Person> optional = getPerson();
if(optional.isPresent()){
        System.out.println(optional.get.getName())
}

# `2) ifPresent(Consumer<? super T> consumer)`

Here is the syntax of `ifPresent()` method.

```java
public void ifPresent(Consumer<? super T> consumer)
```

It takes in a `Consumer` as a parameter and returns nothing. When `ifPresent()` is called, if a value is present, the specified consumer is invoked with the value. Otherwise, nothing happens.

In this lesson, we will look at some of the methods added in Optional class and discuss their functionalities.

Let's Begin

Taste of lambdas

Stream API

Java 8 Collections Improvements

Java 8 Concurrency API Improvements

Java Time API

Conclusion

Optional in Java 8: Part 2

`1) isPresent()`