
What is default method in interface
Functional interface
lambdas
Predicate
Function
Consumer
Supplier
UnaryOperator
BiFunction
BinaryOperator
BiPredicate
BiConsumer
Stream api
forEach()
filter()
map()
collect()
distinct() method
sorted() method
limit() method
skip() method
allMatch() method
anyMatch() method
noneMatch() method
Optional
Method reference
Explore Java 8's flatMap in the stream API, which flattens nested data into a single stream. Compare flatMap with map for one-to-many transformations.
LocalDate
LocalTime
LocalDateTime
ZonedDateTime
Instant
Duration and Period
DateTimeFormatter
Group elements by a classifier using the groupingBy method in Java eight, returning a map of keys to lists, and count occurrences with counting.
Learn how the partitioning by method in the Java stream api splits a collection into two groups by a boolean predicate and supports downstream collectors.
Explore the collectors joining method to concatenate a stream of strings into a single string in the Java Stream API, with three variations including optional delimiters, prefix, and suffix.
List.of()
Set.of()
Map.of()
takeWhile()
dropWhile()
private methods in interface
Explore Java 10's var keyword for local variable type inference and how the compiler infers types. Learn its restrictions and best practices, including use with for-each loops and streams.
String isBlank()
String lines()
String strip()
String stripLeading()
String stripTrailing()
String repeat(n)
Optional.isEmpty()
Files.writeString
Files.readString
Predicate.not
Collections toArray
run java files without explicitly compiling them
Switch expressions
Explore java records, immutable data carriers with auto-generated constructor, getters, equals, hashCode, and toString, ideal for data transfer objects and reducing boilerplate.
Explore pattern matching in modern Java, from reducing explicit casting with instanceof to deconstructing records and primitives in switch with when conditions.
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