IntroductIon to java
Object-Oriented Programming (OOP)
Object-Oriented Programming (OOP) is a programming
paradigm based on the concept of "objects," which can
contain data (attributes) and code (methods). OOP focuses on
reusability, modularity, and organization. Its key concepts are:
• Class: A blueprint for objects, defining their attributes
and behaviors.
• Object: An instance of a class, representing real-world
entities.
• Encapsulation: Bundling of data and methods that
operate on the data into a single unit (class).
• Inheritance: Mechanism by which one class can inherit
fields and methods from another class, promoting code
reuse.
• Polymorphism: Ability of objects to take multiple forms,
usually through method overloading and overriding.
• Abstraction: Hiding implementation details and showing
only essential features.
Features of Java
Java is a high-level, object-oriented programming language
developed by Sun Microsystems (now owned by Oracle). It
has several features that make it powerful and widely used:
, • Platform Independent: Java code is compiled into
bytecode, which runs on the Java Virtual Machine (JVM),
making it platform-independent.
• Object-Oriented: Java is purely object-oriented, meaning
everything in Java revolves around objects and classes.
• Simple: Java’s syntax is straightforward, making it easy to
learn and use.
• Secure: Java provides a secure environment with
bytecode verification, a security manager, and access
control features.
• Multithreaded: Java supports concurrent programming
with multithreading, allowing the execution of multiple
threads simultaneously.
• Robust: Java emphasizes strong memory management
and automatic garbage collection, reducing memory
leaks and crashes.
• Portable: Java programs can run on any system with a
JVM, making them portable across platforms.
• High Performance: Java’s performance is optimized
through Just-In-Time (JIT) compilers, making it relatively
fast for most applications.
Object-Oriented Programming (OOP)
Object-Oriented Programming (OOP) is a programming
paradigm based on the concept of "objects," which can
contain data (attributes) and code (methods). OOP focuses on
reusability, modularity, and organization. Its key concepts are:
• Class: A blueprint for objects, defining their attributes
and behaviors.
• Object: An instance of a class, representing real-world
entities.
• Encapsulation: Bundling of data and methods that
operate on the data into a single unit (class).
• Inheritance: Mechanism by which one class can inherit
fields and methods from another class, promoting code
reuse.
• Polymorphism: Ability of objects to take multiple forms,
usually through method overloading and overriding.
• Abstraction: Hiding implementation details and showing
only essential features.
Features of Java
Java is a high-level, object-oriented programming language
developed by Sun Microsystems (now owned by Oracle). It
has several features that make it powerful and widely used:
, • Platform Independent: Java code is compiled into
bytecode, which runs on the Java Virtual Machine (JVM),
making it platform-independent.
• Object-Oriented: Java is purely object-oriented, meaning
everything in Java revolves around objects and classes.
• Simple: Java’s syntax is straightforward, making it easy to
learn and use.
• Secure: Java provides a secure environment with
bytecode verification, a security manager, and access
control features.
• Multithreaded: Java supports concurrent programming
with multithreading, allowing the execution of multiple
threads simultaneously.
• Robust: Java emphasizes strong memory management
and automatic garbage collection, reducing memory
leaks and crashes.
• Portable: Java programs can run on any system with a
JVM, making them portable across platforms.
• High Performance: Java’s performance is optimized
through Just-In-Time (JIT) compilers, making it relatively
fast for most applications.
