How can I use the Java Stream API for filtering data?

How can I use the Java Stream API for filtering data?

You can use the filter method in the Java Stream API to filter elements based on a condition. For example, if you have a list of integers and want to filter out even numbers, you can do it like this: list.stream().filter(n -> n % 2 != 0).collect(Collectors.toList());

Can you explain how the filter method works in detail?

Sure! The filter method takes a predicate as an argument, which is a functional interface that defines a condition. It returns a new stream that contains only the elements that match the condition specified in the predicate.

What are some common use cases for filtering with streams?

Common use cases include filtering collections based on specific criteria, such as finding all active users in a list or extracting items that meet certain conditions from a dataset.

Are there any performance considerations when using streams?

Yes, while streams can make code more readable, they may have performance overhead due to the creation of intermediate objects. It's important to consider the size of the data and the complexity of the operations.