Java 8

Introduction When working with a collection of elements in Java, it is very common to have duplicate elements, and Java provides different APIs that we can use to solve the problem. Java 8 Stream provides the functionality to perform aggregate operations on a collection, and one of the operations includes finding duplicate elements. In this […]

Learn about how to format Instant to String in java.

In this post, we will see how to convert Date to LocalDate in java. Sometimes, we may need to convert Date to new Java 8 APIs and vice versa. There are multiple ways to convert Date to LocalDate in java. Read also: Convert LocalDate to Date in java Using toInstant() method of Date class You […]

In this post, we will see how to convert LocalDate to Date. Java 8 has introduced a lot of new APIs for Date and time. There can be many ways to convert Java LocalDateTime to date. Using Instant object You can convert LocalDate to Date using Instant object which we can from Zone. Here is […]

In this post, we will see how to convert Stream to List in java. There are multiple ways to convert Stream to List in java. Using Collectors.toList() You can pass Collectors.toList() to Stream.collect() method to convert Stream to List in java. Stream’s collect method performs mutable reduction operation on elements of Stream and Collectors.toList() provides […]

In this post, we will how to convert LocalDateTime to Timestamp . Before learning how to convert localdatetime to timestamp, let us learn about LocalDateTime and Timestamp, and understand the importance of this conversion. LocalDateTime LocalDateTime was introcuded in Java 8. LocalDateTime can be imported time package: import java.time.LocalDateTime; LocalDateTime is an immutable object used […]

In this post, we will see an in-depth overview of Java 8 streams with a lot of examples and exercises. Introduction You may think that Stream must be similar to InputStream or OutputStream, but that’s not the case. A Stream represents a sequence of elements supporting sequential and parallel aggregate operations. Stream does not store […]

In this post, we will see how to convert List to Map using Stream in java 8. Collectors’s toMap() can be used with stream to convert List to Map in java. Consider a class Named Movie which have 3 fields – id, name and genre [crayon-6172720fc3b6f998921921/] Create a list of movies and convert with to […]

In this post, we will see how to sort a list with Stream.sorted() method. Java 8 has introduced Stream.sort() method to sort list of elements conveniently. It helps us to write short and concise functional style code rather than boilerplate code. java.util.Stream has two overloaded versions of sorted() method. sorted(): Returns a stream having elements […]