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What Is Java?
Java is a popular object-oriented language that runs anywhere via the JVM.
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AiTechWorlds
AiTechWorlds
Java is a popular, object-oriented programming language that runs anywhere via the JVM. This visual guide covers classes and objects, OOP principles, the JVM, collections, exceptions, and why Java dominates enterprise and Android development.
Java is a popular object-oriented language that runs anywhere via the JVM.
Java compiles to bytecode that runs on any JVM.
The Java Virtual Machine runs Java bytecode on any platform.
int, double, boolean, char, and String are core types.
A class is a blueprint; an object is an instance of it.
Methods define the behavior of a class.
Constructors initialize new objects.
Hide data with private fields and expose getters/setters.
Classes can extend others to reuse behavior.
One interface, many implementations.
Abstract classes and interfaces hide complexity.
Interfaces define a contract classes must follow.
Lists, Maps, and Sets store groups of data.
try/catch handles errors gracefully.
Generics make collections type-safe.
static belongs to the class; instance to objects.
The JVM frees unused memory automatically.
Java has long powered Android apps.
Spring and Java run huge backend systems.
Strong typing, huge ecosystem, and great career demand.
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