Java OCA 1Z0-808 | 2.4 Wrapper Classes | Autoboxing, Unboxing, Parsing & Integer Cache Trap скачать в хорошем качестве

Java OCA 1Z0-808 | 2.4 Wrapper Classes | Autoboxing, Unboxing, Parsing & Integer Cache Trap

2.1 Identifiers & Naming Conventions —    • Master Java Identifiers & Naming Conventio...   2.2a Variables & Primitive Types —   • Java OCA 1Z0-808 | 2.2a Variables & Primit...   2.2b Type Casting & Conversions —    • Java OCA 1Z0-808 | 2.2b Type Casting & Con...   ← THIS VIDEO 2.3 Object References & Object Lifecycle -    • Java OCA 1Z0-808 | 2.3 Object References v...   2.4 Wrapper Classes — Coming Next (Final YouTube Video!) Java OCA 1Z0-808 2_3_Wrapper Classes_Autoboxing_Unboxing_Parsing Master Wrapper Classes for the Oracle Certified Associate Java SE 8 (1Z0-808) exam. In this video, we cover: ✅ What are Wrapper Classes and why they exist ✅ All 8 Wrapper Classes — Integer, Character and the naming traps ✅ Autoboxing — primitive to wrapper automatically ✅ Unboxing — wrapper to primitive automatically ✅ NullPointerException trap — unboxing null crashes at runtime! ✅ Parsing Strings — parseInt() vs valueOf() ✅ NumberFormatException — what happens with invalid strings ✅ Boolean.parseBoolean() never throws an exception ✅ == vs .equals() for Wrappers ✅ The Integer Cache Trap (-128 to 127) — why == is unpredictable ✅ Practice questions at the end This is Objective 2 of the OCA exam: "Working with Java Data Types — Develop code that uses wrapper classes such as Boolean, Double, and Integer." 📌 Part of our complete Java OCA 1Z0-808 series ✅ Completed: Chapter 1 — Java Basics 1.1 Java Class Structure —    • Java OCA 1Z0 808 1 1 Java Class Structure   1.2 The main() Method —    • Java OCA 1Z0 808 1 2 main Method   1.3 Scope of Variables —    • Java OCA 1Z0-808 | 1.3 Define the Scope of...   1.4 Packages & Imports —    • Java OCA 1Z0-808 | 1.4 Packages & Imports ...   1.5 Java Features —    • Java OCA 1Z0-808 | 1.5 Java Features | Pla...   ✅ Chapter 2 — Working with Java Data Types 2.1 Identifiers & Naming Conventions —    • Master Java Identifiers & Naming Conventio...   2.2a Variables & Primitive Types —    • Java OCA 1Z0-808 | 2.2a Variables & Primit...   2.2b Type Casting & Conversions —    • Java OCA 1Z0-808 | 2.2b Type Casting & Con...   2.3 Object References & Object Lifecycle —    • Java OCA 1Z0-808 | 2.3 Object References v...   2.4 Wrapper Classes ←    • Java OCA 1Z0-808 | 2.4 Wrapper Classes | A...   -THIS VIDEO 📢 For the complete OCA course with all remaining chapters — Methods & Encapsulation, Inheritance, Exceptions, Arrays, Java API, and more — practice with our full platform: 🔗 1,624+ practice questions: https://javalearn.clustermicro.com 🎁 Free 30-question trial — no credit card needed #Java #OCA #1Z0808 #JavaCertification #WrapperClasses #Autoboxing #Unboxing #JavaInteger #IntegerCache #JavaParsing #parseInt #OracleJava #JavaSE8 #JavaExam #JavaTutorial #JavaBasics #JavaOCA8 #NullPointerException #JavaEquals #JavaDataTypes