// HelloWorld.java - Professional Version
public class HelloWorld {
    
    public static void main(String[] args) {
        
        System.out.println("Hello, World!");
        System.out.println("Welcome to Java Programming!");
        
        // Professional additions
        displayProgramInfo();
        
        // Command line arguments demo
        if (args.length > 0) {
            System.out.println("Arguments received: " + 
                             String.join(", ", args));
        }
    }
    
    /**
     * Displays program metadata - professional practice
     */
    private static void displayProgramInfo() {
        System.out.println("\n=== Program Information ===");
        System.out.println("Java Version: " + 
                         System.getProperty("java.version"));
        System.out.println("Operating System: " + 
                         System.getProperty("os.name"));
        System.out.println("User: " + 
                         System.getProperty("user.name"));
    }
}

// Missing semicolon
System.out.println("Hello World")

// Mismatched braces
public class Test {
    public static void main(String[] args) {
        System.out.println("Hello");
    // Missing closing brace

// Wrong class name
public class hello {  // Should be Hello
    // ...
}

// Wrong main method signature
public void main(String[] args) {
    // Should be: public static void main
}

// Case sensitivity
system.out.println("Hello");
// Should be: System.out.println

// Expected when running: java StudentInfo "GTU" "ICT"
=== Student Information System ===
Name: Raj Patel
Enrollment: 21ICT001
College: Government Polytechnic
Branch: Information & Communication Technology

=== System Information ===
Java Version: 21.0.1
Operating System: Windows 11
User: raj.patel
Working Directory: C:\JavaProjects\GTU

=== Command Line Arguments ===
Arguments received: GTU, ICT
Argument count: 2

=== Professional Features ===
✅ Proper error handling implemented
✅ Input validation completed
✅ Professional code structure
✅ Documentation standards followed

Thank you for using Student Info System!
Program executed successfully in 0.045 seconds.

<project>
  <groupId>com.example</groupId>
  <artifactId>my-app</artifactId>
  <version>1.0</version>
  
  <properties>
    <maven.compiler.source>17</maven.compiler.source>
    <maven.compiler.target>17</maven.compiler.target>
  </properties>
  
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.13.2</version>
    </dependency>
  </dependencies>
</project>

plugins {
    id 'java'
    id 'application'
}

java {
    toolchain {
        languageVersion = JavaLanguageVersion.of(17)
    }
}

dependencies {
    testImplementation 'junit:junit:4.13.2'
}

application {
    mainClass = 'com.example.Main'
}