1. Introduction to J... 2. Primitive Data Ty... 3. Variables, Scope,... 4. Operators and Pre... 5. Control Flow: Con... 6. Looping Construct... 7. Arrays: Single an... 8. Methods, Signatur... 9. Classes, Objects,... 11. Encapsulation an... 12. Inheritance and ... 13. Polymorphism and... 14. Abstract Classes... 15. Interfaces, Defa... 16. Static Members, ... 17. Final Keyword: V... 18. Nested, Inner, a... 19. Enums: Basic Con... 20. Records and Immu... 21. Sealed Classes a... 22. String Immutabil... 23. StringBuilder an... 24. Wrapper Classes ... 25. Object Superclas... 26. Exception Hierar... 27. Exception Handli... 28. Try-with-Resourc... 29. Custom Exception... 30. Generics: Type P... 31. Generics: Bounde... 32. Type Erasure and... 33. Collections Fram... 34. List Implementat... 35. Set Implementati... 36. Map Implementati... 37. NavigableMap, So... 38. Queue, Deque, an... 39. Iterators, Split... 40. Comparable and C... 41. Functional Inter... 42. Built-in Functio... 43. Method Reference... 44. Stream API: Crea... 45. Stream Intermedi... 46. Stream Terminal ... 47. Primitive Stream... 48. Parallel Streams... 49. Optional Type: A... 50. I/O Streams: Byt... 51. Buffered I/O and... 52. Serialization an... 53. NIO.2 File Syste... 54. Memory-Mapped Fi... 55. Java Date and Ti... 56. Reflection API: ... 57. Custom Annotatio... 58. Dynamic Proxies ... 59. Multithreading: ... 60. Synchronization ... 61. Volatile Keyword... 62. Inter-Thread Com... 63. Thread Pools and... 64. Callable, Future... 65. Explicit Locks: ... 66. Atomic Variables... 67. Thread-Safe Coll... 68. Synchronizers: C... 69. Virtual Threads ... 70. JVM Memory Layou... 71. Garbage Collecti... 72. Modern Garbage C... 73. ClassLoaders and... 74. Just-In-Time (JI... 75. Java Module Syst... 76. JDBC Architectur... 77. PreparedStatemen... 78. JDBC Transaction... 79. Database Connect... 80. Java Networking:... 81. Modern HTTP Clie... 82. Java Security: C... 83. Creational Desig... 84. Structural Desig... 85. Behavioral Desig... 86. SOLID Principles... 87. Unit Testing wit... 88. Parameterized Te... 89. Mocking Framewor... 90. Microbenchmarkin... 91. Enterprise Loggi... 92. JSON Processing:... 93. Spring Framework... 94. Spring Boot: Aut... 95. JPA and Hibernat... 96. Hibernate Perfor... 97. Secure Coding Pr... 98. JVM Profiling, T... 99. Foreign Function... 100. Building Resili...