Java – Enterprise Programming

Java is a class-based, object-oriented programming language designed to have minimal implementation dependencies. Its “write once, run anywhere” philosophy makes it ideal for enterprise applications.

Key Features

• Platform Independent: JVM runs everywhere
• Robust Ecosystem: Maven, Gradle, Spring
• Strong Typing: Compile-time type checking
• Memory Management: Automatic garbage collection
• Multithreading: Built-in concurrency support

Installation

Install Java on Ubuntu:

sudo apt update
sudo apt install openjdk-21-jdk

# Verify installation
java --version

Usage Examples

Java programming:

// Simple REST endpoint with Spring Boot
@RestController
public class UserController {
    
    @GetMapping("/users/{id}")
    public User getUser(@PathVariable Long id) {
        return userService.findById(id);
    }
    
    @PostMapping("/users")
    public User createUser(@RequestBody User user) {
        return userService.save(user);
    }
}

Benefits

Java powers enterprise systems with proven reliability. Its mature ecosystem and strong typing provide stability for large-scale applications.

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