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JDK 17 examples and demo projects

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README.md

This project is WIP ! Stay tuned.

This project aggregates examples of new Java and JVM features between versions 12 and 17 as well as practical java examples tailored for Java 17.

Make sure following software is installed on your PC.

Most examples are build by top-level gradle project.

gradle clean build test installDist distZip
  • Most interesting JEPs implemented in JDK12 — JDK17
    • JEP 359, 384: Records
    • JEP 325, 354, 361: Switch Expressions
    • JEP 353: Reimplement the Legacy Socket API
    • JEP 355, 368, 378: Text Blocks
    • JEP 305: Pattern Matching for instanceof
    • JEP 358: Helpful NullPointerExceptions
    • JEP 373: Reimplement the Legacy DatagramSocket API
    • JEP 370, 383: Foreign-Memory Access API
    • JEP 339: Edwards-Curve Digital Signature Algorithm (EdDSA)
    • JEP 360: Sealed Classes (Preview)
    • JEP 371: Hidden Classes
    • JDK12 [2019-03-19] Feature list
    • JDK13 [2019-09-17] Feature list
    • JDK14 [2020-03-17] Feature list
    • JDK15 [2020-09-15] Feature list
    • JDK16 [2021-03-16] Feature list
    • JDK17 [2021-09-14] Feature list

    Источник

    Java Examples

    The best way to learn Java programming is by practicing examples. The page contains examples on basic concepts of Java. You are advised to take the references from these examples and try them on your own.

    All the programs on this page are tested and should work on all platforms.

    Want to learn Java by writing code yourself? Enroll in our Interactive Java Course for FREE.

    Java Program to Check Prime Number

    Java Program to Display Fibonacci Series

    Java Program to Create Pyramids and Patterns

    Java Program to Reverse a Number

    1. Java Program to Print an Integer (Entered by the User)
    2. Java Program to Add Two Integers
    3. Java Program to Multiply two Floating Point Numbers
    4. Java Program to Find ASCII Value of a character
    5. Java Program to Compute Quotient and Remainder
    6. Java Program to Swap Two Numbers
    7. Java Program to Check Whether a Number is Even or Odd
    8. Java Program to Check Whether an Alphabet is Vowel or Consonant
    9. Java Program to Find the Largest Among Three Numbers
    10. Java Program to Find all Roots of a Quadratic Equation
    11. Java Program to Check Leap Year
    12. Java Program to Check Whether a Number is Positive or Negative
    13. Java Program to Check Whether a Character is Alphabet or Not
    14. Java Program to Calculate the Sum of Natural Numbers
    15. Java Program to Find Factorial of a Number
    16. Java Program to Generate Multiplication Table
    17. Java Program to Display Fibonacci Series
    18. Java Program to Find GCD of two Numbers
    19. Java Program to Find LCM of two Numbers
    20. Java Program to Display Alphabets (A to Z) using loop
    21. Java Program to Count Number of Digits in an Integer
    22. Java Program to Reverse a Number
    23. Java Program to Calculate the Power of a Number
    24. Java Program to Check Palindrome
    25. Java Program to Check Whether a Number is Prime or Not
    26. Java Program to Display Prime Numbers Between Two Intervals
    27. Java Program to Check Armstrong Number
    28. Java Program to Display Armstrong Number Between Two Intervals
    29. Java Program to Display Prime Numbers Between Intervals Using Function
    30. Java Program to Display Armstrong Numbers Between Intervals Using Function
    31. Java Program to Display Factors of a Number
    32. Java Program to Make a Simple Calculator Using switch. case
    33. Java Program to Check Whether a Number can be Expressed as Sum of Two Prime Numbers
    34. Java Program to Find the Sum of Natural Numbers using Recursion
    35. Java Program to Find Factorial of a Number Using Recursion
    36. Java Program to Find G.C.D Using Recursion
    37. Java Program to Convert Binary Number to Decimal and vice-versa
    38. Java Program to Convert Octal Number to Decimal and vice-versa
    39. Java Program to Convert Binary Number to Octal and vice-versa
    40. Java Program to Reverse a Sentence Using Recursion
    41. Java Program to calculate the power using recursion
    42. Java Program to Calculate Average Using Arrays
    43. Java Program to Find Largest Element of an Array
    44. Java Program to Calculate Standard Deviation
    45. Java Program to Add Two Matrix Using Multi-dimensional Arrays
    46. Java Program to Multiply Two Matrix Using Multi-dimensional Arrays
    47. Java Program to Multiply two Matrices by Passing Matrix to a Function
    48. Java Program to Find Transpose of a Matrix
    49. Java Program to Find the Frequency of Character in a String
    50. Java Program to Count the Number of Vowels and Consonants in a Sentence
    51. Java Program to Sort Elements in Lexicographical Order (Dictionary Order)
    52. Java Program to Add Two Complex Numbers by Passing Class to a Function
    53. Java Program to Calculate Difference Between Two Time Periods
    54. Java Code To Create Pyramid and Pattern
    55. Java Program to Remove All Whitespaces from a String
    56. Java Program to Print an Array
    57. Java Program to Convert String to Date
    58. Java Program to Round a Number to n Decimal Places
    59. Java Program to Concatenate Two Arrays
    60. Java Program to Convert Character to String and Vice-Versa
    61. Java Program to Check if An Array Contains a Given Value
    62. Java Program to Check if a String is Empty or Null
    63. Java Program to Get Current Date/TIme
    64. Java Program to Convert Milliseconds to Minutes and Seconds
    65. Java Program to Add Two Dates
    66. Java Program to Join Two Lists
    67. Java Program to Convert a List to Array and Vice Versa
    68. Java Program to Get Current Working Directory
    69. Java Program to Convert Map (HashMap) to List
    70. Java Program to Convert Array to Set (HashSet) and Vice-Versa
    71. Java Program to Convert Byte Array to Hexadecimal
    72. Java Program to Create String from Contents of a File
    73. Java Program to Append Text to an Existing File
    74. Java Program to Convert a Stack Trace to a String
    75. Java Program to Convert File to byte array and Vice-Versa
    76. Java Program to Convert InputStream to String
    77. Java Program to Convert OutputStream to String
    78. Java Program to Lookup enum by String value
    79. Java Program to Compare Strings
    80. Java Program to Sort a Map By Values
    81. Java Program to Sort ArrayList of Custom Objects By Property
    82. Java Program to Check if a String is Numeric
    83. Java Program to convert char type variables to int
    84. Java Program to convert int type variables to char
    85. Java Program to convert long type variables into int
    86. Java Program to convert int type variables to long
    87. Java Program to convert boolean variables into string
    88. Java Program to convert string type variables into boolean
    89. Java Program to convert string type variables into int
    90. Java Program to convert int type variables to String
    91. Java Program to convert int type variables to double
    92. Java Program to convert double type variables to int
    93. Java Program to convert string variables to double
    94. Java Program to convert double type variables to string
    95. Java Program to convert primitive types to objects and vice versa
    96. Java Program to Implement Bubble Sort algorithm
    97. Java Program to Implement Quick Sort Algorithm
    98. Java Program to Implement Merge Sort Algorithm
    99. Java Program to Implement Binary Search Algorithm
    100. Java Program to Call One Constructor from another
    101. Java Program to implement private constructors
    102. Java Program to pass lambda expression as a method argument
    103. Java Program to pass method call as arguments to another method
    104. Java Program to Calculate the Execution Time of Methods
    105. Java Program to Convert a String into the InputStream
    106. Java Program to Convert the InputStream into Byte Array
    107. Java Program to Load File as InputStream
    108. Java Program to Create File and Write to the File
    109. Java Program to Read the Content of a File Line by Line
    110. Java Program to Delete File in Java
    111. Java Program to Delete Empty and Non-empty Directory
    112. Java Program to Get the File Extension
    113. Java Program to Get the name of the file from the absolute path
    114. Java Program to Get the relative path from two absolute paths
    115. Java Program to Count number of lines present in the file
    116. Java Program to Determine the class of an object
    117. Java Program to Create an enum class
    118. Java Program to Print object of a class
    119. Java Program to Create custom exception
    120. Java Program to Create an Immutable Class
    121. Java Program to Check if two strings are anagram
    122. Java Program to Compute all the permutations of the string
    123. Java Program to Create random strings
    124. Java Program to Clear the StringBuffer
    125. Java Program to Capitalize the first character of each word in a String
    126. Java Program to Iterate through each characters of the string.
    127. Java Program to Differentiate String == operator and equals() method
    128. Java Program to Implement switch statement on strings
    129. Java Program to Calculate simple interest and compound interest
    130. Java Program to Implement multiple inheritance
    131. Java Program to Determine the name and version of the operating system
    132. Java Program to Check if two of three boolean variables are true
    133. Java Program to Iterate over enum
    134. Java Program to Check the birthday and print Happy Birthday message
    135. Java Program to Implement LinkedList
    136. Java Program to Implement stack data structure
    137. Java Program to Implement the queue data structure
    138. Java Program to Get the middle element of LinkedList in a single iteration
    139. Java Program to Convert the LinkedList into an Array and vice versa
    140. Java Program to Convert the ArrayList into a string and vice versa
    141. Java Program to Iterate over an ArrayList
    142. Java Program to Iterate over a HashMap
    143. Java Program to Iterate over a Set
    144. Java Program to Merge two lists
    145. Java Program to Update value of HashMap using key
    146. Java Program to Remove duplicate elements from ArrayList
    147. Java Program to Get key from HashMap using the value
    148. Java Program to Detect loop in a LinkedList
    149. Java Program to Calculate union of two sets
    150. Java Program to Calculate the intersection of two sets
    151. Java Program to Calculate the difference between two sets
    152. Java Program to Check if a set is the subset of another set
    153. Java Program to Sort map by keys
    154. Java Program to Pass ArrayList as the function argument
    155. Java Program to Iterate over ArrayList using Lambda Expression
    156. Java Program to Implement Binary Tree Data Structure
    157. Java Program to Perform the preorder tree traversal
    158. Java Program to Perform the postorder tree traversal
    159. Java Program to Perform the inorder tree traversal
    160. Java Program to Count number of leaf nodes in a tree
    161. Java Program to Check if a string contains a substring
    162. Java Program to Access private members of a class
    163. Java Program to Check if a string is a valid shuffle of two distinct strings
    164. Java Program to Implement the graph data structure
    165. Java Program to Remove elements from the LinkedList.
    166. Java Program to Add elements to a LinkedList
    167. Java Program to Access elements from a LinkedList.

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