Introduction
What is Java?
Key points
- Java is not just a language, it is also considered as a technology that gives a platform to create mobile and web applications, games, etc. It has many frameworks and libraries like Spring, Hibernate, Servlet JSP, etc.
- Java is one of the most popular programming languages in the world. It is used by around 80% of IT giants.
Definition
Java is a high-level programming language. It has a JAVA compiler that converts Java language to machine language or byte code. It is an object-oriented programming language because every action is performed with the object's help. The complete program code is placed within classes and interfaces. We can refer to a class as a blueprint of an object.
Definition
Java is a high-level programming language. It has a JAVA compiler that converts Java language to machine language or byte code. It is an object-oriented programming language because every action is performed with the object's help. The complete program code is placed within classes and interfaces. We can refer to a class as a blueprint of an object.
Java First Program
Example:
public class FirstProgram {
public static void main(String[] args) {
System.out.println("Welcome TO Quipo House");
}
}Output:
Welcome TO Quipo House Java Features
- Simple to learn: Java's syntax is clean and easy to understand, making it accessible for beginners.
- Compiled and Interpreted: Java code is first compiled into bytecode, which is then interpreted by the Java Virtual Machine (JVM).
- Platform Independent: Java programs can run on any device with a JVM.
- Portable: Java's bytecode can be executed on any platform without modification.
- Architectural Neutral: Java's design ensures that the code does not rely on any specific hardware or operating system.
- Object-Oriented: Java uses objects to perform operations.
- Robust: Exception handling in Java facilitates the creation of reliable applications.
- Secure: Features like bytecode verification and access control lead to a secure application.
- Distributed: Java supports the development of applications that can operate across multiple computers in a network, allowing for distributed computing.
- Multi-threaded and Interactive: Java allows concurrent execution of two or more threads for interactive and responsive applications.
- High Performance: Java's Just-In-Time (JIT) compiler and optimized runtime environment offer high performance.
- Dynamic and Extensible: Java supports dynamic loading of classes and integrates easily with other libraries and frameworks.
2-min Drill
Java Overview:
Java is a high-level, object-oriented programming language and technology used for building applications across devices.
Key Concepts:
Object-Oriented: In Java, everything is object-oriented.
Transferable (platform-independent): you write Java code once for each machine and IG will run on any device that is also using a JVM.
Strong & Secure: Fully Automatic Memory Management. Very High-Level Security as well for the datastore level and at the REST API layer.
Key Features:
Similar to C++: Clean Systax. Easy for Learning
Thread Safe: Can be used without interference.
High-speed: Unique technology using Just-In-Time (JIT) compilation.
- Simple to learn: Java's syntax is clean and easy to understand, making it accessible for beginners.
- Compiled and Interpreted: Java code is first compiled into bytecode, which is then interpreted by the Java Virtual Machine (JVM).
- Platform Independent: Java programs can run on any device with a JVM.
- Portable: Java's bytecode can be executed on any platform without modification.
- Architectural Neutral: Java's design ensures that the code does not rely on any specific hardware or operating system.
- Object-Oriented: Java uses objects to perform operations.
- Robust: Exception handling in Java facilitates the creation of reliable applications.
- Secure: Features like bytecode verification and access control lead to a secure application.
- Distributed: Java supports the development of applications that can operate across multiple computers in a network, allowing for distributed computing.
- Multi-threaded and Interactive: Java allows concurrent execution of two or more threads for interactive and responsive applications.
- High Performance: Java's Just-In-Time (JIT) compiler and optimized runtime environment offer high performance.
- Dynamic and Extensible: Java supports dynamic loading of classes and integrates easily with other libraries and frameworks.
2-min Drill
Java Overview:
Java is a high-level, object-oriented programming language and technology used for building applications across devices.
Key Concepts:
Object-Oriented: In Java, everything is object-oriented.
Transferable (platform-independent): you write Java code once for each machine and IG will run on any device that is also using a JVM.
Strong & Secure: Fully Automatic Memory Management. Very High-Level Security as well for the datastore level and at the REST API layer.
Key Features:
Similar to C++: Clean Systax. Easy for Learning
Thread Safe: Can be used without interference.
High-speed: Unique technology using Just-In-Time (JIT) compilation.