01B Java 17 Certification Course
🎯 Java 17 Certification Course - Episode 01B
Java 17 Certification Course (Preparing for version 21)
Code: https://github.com/cursosmrugerio/cur...
We continue with our complete *Java 17 Certification* course! In this second part, we delve deeper into fundamental concepts for the exam.
📚 What you will learn in this video:
🗑️ *Garbage Collector in Depth*
How the *Garbage Collector* works in the JVM
When an object is *eligible* for collection
Null references and memory release
Practical memory analysis exercises
🔒 *The FINAL Keyword*
**Final in primitives**: Creating constants
**Final in references**: Reassignment locking
**Final in methods**: Override prevention
**Final in classes**: Inheritance locking
Examples with String and StringBuilder
🧩 *Certification Exercises*
Solving real exam questions
Analyzing *complex references* between objects
Pattern of objects referencing themselves
Memory diagrams for Complex Cases
🔧 *Advanced String Pools*
The `intern()` method for moving objects into the pool
Differences between objects created with `new` vs. literals
Memory optimization with StringBuilder
Converting StringBuilder objects to Strings
🎯 *Key Exam Concepts:*
*Reference variables* vs. *objects* in memory
*Eligibility* for Garbage Collection
*Inheritance* and restrictions with `final`
*String Pools* and optimization
⏰ Timestamps:
00:00 - Review and Q&A from the previous session
12:16 - Garbage Collector exercise (Question 5)
32:27 - Analyzing complex references
46:12 - Additional exercises from the book
59:00 - The keyword `Final` in detail
01:16:16 - String Pool and the intern() Method
📖 *Resources Used:*
Official Java 17 Certification Book
Chapter 1 Exercises (23 questions)
*Custom GPT* for additional practice
Explanatory Memory Diagrams
🤖 *Extra Tool:*
I'm sharing my *custom GPT* for Java 17 certification - use it to resolve doubts and generate additional exercises.
💡 *For the Next Session:*
Answer the *23 questions* from Chapter 1
Review the concepts of references and objects
Prepare specific questions about Garbage Collection
🔗 *Course Resources:*
Complete source code on *GitHub*
Study materials in PDF format
Custom GPT for practice
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*#Java17 #JavaCertification #GarbageCollector #FinalKeyword #PoolOfStrings #JavaMemory #ObjectOrientedProgramming #OracleJava*
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*💬 Tell us in the comments:* What concept did you find most interesting in this session?
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