HowToDoInJava

Java Tutorials

“Core Java” is Sun’s term, used to refer to Java SE, the standard edition and a set of related technologies, like the Java VM, CORBA, etc. This is mostly to differentiate from others like Java ME or Java EE. “Core Java” is Oracle’s definition and refers to subset of Java SE technologies.

The Core Java technologies and application programming interfaces (APIs) are the foundation of the Java Platform, Standard Edition (Java SE). They are used in all classes of Java programming, from desktop applications to Java EE applications.

  1. Java FileWriter
  2. Java InputStreamReader
  3. Java StringReader
  4. Java FileReader
  5. Installing Java on 64 bit Windows
  6. Java Hello World Program
  7. Java Read File from Classpath
  8. yield keyword in Java
  9. Java 8 – Period
  10. Java 8 – TemporalAdjusters
  11. Java – Date Formatting
  12. Java 8 – Date Parsing and Validation
  13. Java – Get All Dates Between Two Dates
  14. Java 8 – Calculate days between two dates
  15. Java 8 – Calculate business days between two dates
  16. Java 8 – Add or subtract N business days to date
  17. Java 8 – DayOfWeek
  18. Java 8 – TemporalQuery
  19. Java – Get Next and Previous Date
  20. Java UUID Generator Example
  21. Pairs in Java
  22. Java 8 – Parse string to date-time in UTC
  23. Java 8 ResolverStyle.STRICT
  24. Regex – Match any character or set of characters
  25. Regex – Match Start or End of String (Line Anchors)
  26. Java DelayQueue
  27. ExecutorService – shutdown(), shutdownNow() and awaitTermination​()
  28. ExecutorService – Cancel a task in executor
  29. ScheduledExecutorService – Running task in executor after delay
  30. ExecutorService invokeAll()
  31. ExecutorService invokeAny()
  32. Callable Future Example
  33. Executor RejectedExecutionHandler
  34. ExecutorService in Java
  35. Compare LocalDateTime instances
  36. Compare LocalDate instances
  37. A Guide to AtomicInteger in Java
  38. Format date/timestamp in 12 hours pattern
  39. LocalDate format() API
  40. Java – Check given year is leap year or not?
  41. Java 8 – Compare ZonedDateTime
  42. Format ZonedDateTime to String in Java 8
  43. Convert between LocalDate and ZonedDateTime
  44. Java 8 – Convert between LocalDateTime and LocalDate
  45. ZonedDateTime parse()
  46. LocalDateTime parse()
  47. LocalDate parse()
  48. Java ZonedDateTime class
  49. Java LocalDateTime class
  50. Java LocalTime class
  51. Java LocalDate class
  52. JMeter tutorial
  53. How to get union between two arrays
  54. How to get intersection between two arrays
  55. Java Command Line Arguments
  56. A Guide to Recursion in Java
  57. Java instance initializer blocks
  58. Java – Naming Conventions
  59. Difference between this and super in Java
  60. strictfp modifier in Java
  61. Difference between final, finally and finalize in Java
  62. Java extends vs implements keywords
  63. Java instanceof operator
  64. Java throw and throws keywords
  65. Java synchronized keyword
  66. Java try catch finally blocks
  67. Java boolean keyword
  68. Java assert keyword – assertion in Java
  69. Java abstract keyword – abstract classes and methods
  70. Java Flow Control Statements
  71. Java CopyOnWriteArraySet class
  72. Java CopyOnWriteArrayList class
  73. Java TransferQueue – Java LinkedTransferQueue class
  74. Java ArrayBlockingQueue class
  75. Java PriorityBlockingQueue class
  76. Java PriorityQueue class
  77. Java Spliterator interface
  78. Java ListIterator interface
  79. Java Iterator interface example
  80. Java Comparator interface example
  81. Java Comparable interface example
  82. Java LinkedList class
  83. Java TreeSet class
  84. Java LinkedHashSet class
  85. Java HashSet class
  86. Java Hashtable class
  87. Java TreeMap class
  88. Java LinkedHashMap class
  89. How to clone HashMap – Shallow and Deep Copy
  90. How to remove duplicate elements in ArrayList
  91. Java – Remove duplicates from array
  92. How to Synchronize HashMap in Java
  93. How to join or merge two hashmaps in Java
  94. How to compare two hashmaps in Java
  95. ArrayList spliterator() method example
  96. ArrayList removeIf() – remove objects by field
  97. ArrayList sort() – Sort list of objects by field
  98. ArrayList replaceAll() method example
  99. ArrayList retainAll() method example
  100. ArrayList removeAll() – remove all occurrences from list