vinayagamd/learnjava8

Learning Java8 Features And Implementation

LearnJava8

Learning Java8 Features And Implementation

Environment

SDK
Java 8 : https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html

IDE
Intellij Idea Community Edition: https://www.jetbrains.com/idea/download/

Purpose of the repo is learn available methods and option in Java 8

• Imperative vs Declarative Style Example
• About lambda
• Lambda API : https://docs.oracle.com/javase/8/docs/api/java/util/function/package-summary.html
  • Consumer
  • BiConsumer
  • Predicate
  • BiPredicate
  • Function
    • Min
    • Max
  • BiFunction
  • Supplier
• Stream API : https://docs.oracle.com/javase/8/docs/api/java/util/stream/package-summary.html
  • Operation
    • Map
    • Flatmap
    • Reduce
    • Collect
    • Filter
    • Sort
    • Min
    • Max
    • Limit
    • Skip
    • allMatch
    • anyMatch
    • noneMatch
    • findAny
    • findFirst
  • Factory Methods
    • of
    • generate
    • iterate
  • Numeric Streams
    • Class to handle primitive types
      • IntStream
      • LongStream
      • DoubleStream
    • range
    • rangeClosed
    • count
    • foreach
    • Aggregate Functions
      • sum
      • max
      • min
      • average
      • Extra Class
        • OptionalInt
        • OptionalLong
        • OptionalDouble
    • Boxing & Unboxing
      • boxed
      • mapToInt
      • mapToLong
      • mapToDouble
      • mapToObj
  • Terminal Operations
    • joining
    • counting
    • mapping
    • summingInt
    • averagingInt
    • summingLong
    • averagingLong
    • summingDouble
    • averagingDouble
    • maxBy
    • minBy
    • groupingBy
    • partitioningBy
  • Parallel Processing
    • sequential vs parallel
    • when not to use parallel stream
      • boxed
• Optional : https://docs.oracle.com/javase/8/docs/api/java/util/Optional.html
  • isPresent
  • get
  • ofNullable
  • empty
  • orElse
  • orElseGet
  • orElseThrow
  • ifPresent
  • map
  • flatMap
  • filter
• Default & Static Method
  • Interface
    • Default Method (default)
    • Static Method
    • Multiple Inheritance
    • Resolving Multiple Inheritance Issue
  • Abstract vs Interface
• Date & Time Libraries [Joda DateTime Insipiration] : https://docs.oracle.com/javase/8/docs/api/java/time/package-summary.html

  • LocalDate

    • Creation
      • now
      • of
      • ChronoField
      • ChronoUnit
      • TemporalAdjusters
    • Accessing
      • getMonth
      • getMonthValue
      • getYear
      • getDayOfMonth
      • getDayOfYear
    • Modifying
      • plusDays
      • plusMonths
      • plusYears
      • minusDays
      • minusMonths
      • minusYears
      • with
    • Validation
      • isEqual
      • isBefore
      • isAfter
      • isSupported
      • isLeapYear

  • LocalTime

    • All functionality same as LocalDate except date related
    • Accessing
      • getHour
      • getMinute
      • getNanoOfSecond
      • toSecondOfDay -> represents time in seconds
    • Modifying
      • minusHours

  • LocalDateTime

    • All functionality same as LocalDate and LocalTime

  • Period -> Only compatible with LocalDate & LocalDateTime

  • Duration -> Only compatible with LocalTime & LocalDateTime

  • Instant

    • now
    • getEpochSeconds
    • ofEpochSeconds

  • ZonedDateTime

  • ZoneId

  • ZoneOffset

  • Clock

  • DateTimeFormatter

Java 8

Lambda Expression

Lambda Example

Stream Api

Trained From Udemy

Udemy: https://www.udemy.com/
Tutorial Link:https://www.udemy.com/modern-java-learn-java-8-features-by-coding-it/learn/v4/overview
JDK 8: https://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html