Java-Example

This repository contains the basic & advance level examples related to Java Programming Languages.

Modern Java Examples

• ImperativeVsDeclarative
• Lambdas
• Functional Interface
  • Consumer
  • BiConsumer
  • Predicate
  • Predicate + Consumer
  • BiPredicate
  • Function
  • BiFunction
  • UnaryOperator
  • BinaryOperator
  • Supplier
• Method Reference
  • Consumer Method Reference
  • Refactoring Method Reference
• Constructor Reference
• Lambdas and Local Variables
• Streams
  • Stream Example
  • Collection vs Stream
• Streams API Operations
  • map()
  • flatMap()
  • distinct(), count() and sorted()
  • sort() using Comparator
  • filter()
  • reduce()
  • map() + filter() + reduce()
  • max and min using reduce()
  • skip() and limit()
  • allMatch(), anyMatch() and noneMatch()
  • findFirst() and findAny()
  • of(), iterate() and generate()
• Numeric Streams
  • range(), rangeClosed() and count()
  • sum(), max(), min() and average()
  • boxing, unboxing and mapToInt()
  • mapToObj(), mapToLong() and mapToDouble()
• Stream Terminal Operations
  • joining()
  • counting()
  • mapping()
  • minBy() and maxBy()
  • summingInt() and averagingInt()
  • groupingBy()
  • groupingBy() - with maxBy(), minBy() and collectingThen()
  • partitioningBy()
• parallelStream
  • parallel Stream Example & Performance
  • sequential & parallel Stream Comparison
  • sequential & parallel stream unboxing Performance
  • parallel stream mutating variable
• Optional
  • Optional Example
  • ofNullable(), of() and empty()
  • orElse(), orElseGet() and orElseThrow()
  • ifPresent() and isPresent()
  • filter(), map() and flatMap()
• Defaults
  • default methods
  • sort using Comparator
  • Comparator: nullsFirst and nullsLast
  • default and static methods in Interface
  • default method Multiple Inheritance
  • Interfaces with same method signature Conflicts
• 新建 Date/Time API's
  • LocalDate, LocalTime and LocalDateTime
    • LocalDate
      • Modifying LocalDate
      • Additional Operation on LocalDate
    • LocalTime

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Contributing

This repository is a personal project, but we welcome pull requests to keep the Java coding style up to date with new concepts. Additionally, feel free to fork the repository and modify it as you see fit.