Three Ways to Sum a Stream of Numbers
In this post, we will see the three ways to sum a stream of numbers (using Java streams). We use the mapToInt, reduce, and collect methods.
java8
In this post, we will see the three ways to sum a stream of numbers (using Java streams). We use the mapToInt, reduce, and collect methods.
This post covers the default method resolution rules. These will be used when a class inherits more than one method with the same signature.
Default methods in Java enable us to add new functionality to the interfaces of our libraries without breaking the existing implementations of the interface
Java 8 streams are lazy. The intermediate operations will not be executed till a terminal operation is invoked. But, Java 8 streams flatMap are not lazy.
This post shows the Collectors toMap duplicate key exception and the changes made in Java 9 to improve the exception message to contain the value of the key.
The Collectors groupingBy is a static utility method in the Collectors class. It is used to group the stream elements by a key. In this blog post, we will look at the Collectors groupingBy with examples.
In this blog post, I will demonstrate the Java 8 Collectors.toMap method with examples and how it’s used to fold a stream into a map.
A method reference is a reference to an existing method. When a lambda expression just calls an existing method, we can use a Method Reference.
A sequence of primitive int-valued elements supporting sequential and parallel and aggregate operations. It is an int primitive specialization of Stream.