What plugins can be installed when creating a virtual…

A virtual machine in the context of Java is the JVM (Java Virtual Machine). When you create (install JRE/JDK) it, you do not install plugins in the usual sense (like in a browser). Plugins are used in IDEs (Integrated Development Environments) or build tools (Maven, Gradle) to extend their functionality when working with Java code.

The most common types of plugins used in Java development:

Plugins for IDEs (IntelliJ IDEA, Eclipse, NetBeans):
- Plugins for supporting various frameworks (Spring, Hibernate, Vaadin).
- Plugins for code analysis and static analysis (SonarLint).
- Plugins for working with databases.
- Plugins for integration with version control systems (Git).
- Plugins for debugging and profiling.
```
// Example of using Spring Framework supported by an IDE plugin
@Service
public class MyService {
    // ...
}
```

Plugins for build tools (Maven, Gradle):

Plugins for compilation (maven-compiler-plugin, gradle-java-plugin).
Plugins for running tests (maven-surefire-plugin, gradle-test-plugin).
Plugins for creating executable JAR/WAR files (maven-jar-plugin, gradle-jar-plugin).
Plugins for dependency analysis.
Plugins for generating documentation (maven-javadoc-plugin).
Plugins for static code analysis (maven-checkstyle-plugin, gradle-checkstyle-plugin).

<!-- Example configuration of Maven plugin for compilation -->
<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.8.1</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
            </configuration>
        </plugin>
    </plugins>
</build>

// Example configuration of Gradle plugin for Java
plugins {
    id 'java'
}

java {
    sourceCompatibility = JavaVersion.VERSION_1_8
    targetCompatibility = JavaVersion.VERSION_1_8
}

Plugins for JVM monitoring:
- Plugins for monitoring tools (JMX, VisualVM) to collect JVM performance metrics and status.

If the question implied the possibility of extending the JVM's functionality at runtime, this is achieved with a Java Agent. Agents are injected into the JVM at startup and can modify class bytecode "on the fly", implementing profiling, monitoring, and other tasks.

# Running JVM with an agent
java -javaagent:/path/to/myagent.jar MyMainClass

Comparison table:

Plugin Type	Used where	Purpose	Example
IDE Plugins	Development environment	Extend IDE functionality	Support for frameworks, code analysis
Build Tool Plugins	Maven, Gradle	Automate build, testing, etc.	Compilation, running tests, packaging
Java Agent	JVM at runtime	Interact with JVM "on the fly"	Profiling, monitoring

Thus, when creating a Java Virtual Machine (JVM), plugins are not installed as such. Plugins are more in demand at higher levels of development abstraction: in IDEs, build systems, or as Java agents that interact with the JVM during its operation.

What plugins can be installed when creating a virtual machine?