How can I use the Java Stream API for advanced data processing?

How can I use the Java Stream API for advanced data processing?

The Java Stream API allows you to process sequences of elements, such as collections, in a functional style. You can perform operations like filtering, mapping, and reducing data efficiently.

Can you give me an example of using streams to filter and sort a list?

Sure! You can use the filter method to filter elements and sorted to sort them. For example:

List<String> names = Arrays.asList("John", "Jane", "Jack", "Jill");
List<String> filteredSortedNames = names.stream()
    .filter(name -> name.startsWith("J"))
    .sorted()
    .collect(Collectors.toList());

What about using streams with custom objects?

You can definitely use streams with custom objects! Just ensure your custom class has the necessary getters. For example:

List<Person> people = Arrays.asList(new Person("John", 30), new Person("Jane", 25));
List<Person> sortedPeople = people.stream()
    .filter(person -> person.getAge() > 25)
    .sorted(Comparator.comparing(Person::getName))
    .collect(Collectors.toList());

How do I handle exceptions when using streams?

Handling exceptions in streams can be tricky. One common approach is to wrap the code in a try-catch block within a lambda expression. Alternatively, you can create a utility method to handle exceptions.