# Io / Github / Biezhi / Java11 / Processor

## Overview

This module appears to be a very small Java 11 Process API example. It demonstrates how to obtain the current JVM process via `ProcessHandle` and print its PID to the console. The package exists as a focused learning/demo area rather than a reusable library layer, and the code is intentionally minimal so the Process API behavior is easy to see.

## Key Classes and Interfaces

### [`Example`](src/main/java/io/github/biezhi/java11/processor/Example.java:17)

`Example` is the only class in this package. It serves as a runnable entry point for demonstrating `ProcessHandle.current()` and the `pid()` accessor.

#### `main(String[] args)`

- **Purpose:** Gets the current process handle and prints the current process ID.
- **Parameters:** `args` is accepted to match the standard Java entry point signature, but it is not used.
- **Returns:** `void`.
- **Side effects:** Writes a line to standard output containing the current process PID.

The implementation is straightforward:
1. Call `ProcessHandle.current()` to get a handle for the running JVM process.
2. Call `pid()` on that handle.
3. Print the PID with a Chinese message: `当前进程的 PID = ...`.

This method is the entire observable behavior of the package.

## How It Works

The flow is linear and has no branching logic or external dependencies:

1. The JVM starts `Example.main(...)`.
2. `ProcessHandle.current()` returns a handle representing the current process.
3. The code reads the numeric PID from that handle.
4. The PID is written to `System.out`.

Because the module only reads runtime process metadata, it does not manage child processes, inspect process hierarchies, or interact with operating-system resources beyond the current process identity.

## Mermaid Diagram

```mermaid
flowchart TD
ExampleClass["io.github.biezhi.java11.processor.Example"] --> MainMethod["main(String[] args)"]
MainMethod["main(String[] args)"] --> CurrentHandle["ProcessHandle.current()"]
CurrentHandle["ProcessHandle.current()"] --> PrintPid["Print current process PID"]
```

## Dependencies and Integration

- The module depends only on the Java platform API, specifically `java.lang.ProcessHandle`.
- There are no package-local collaborators, no cross-module references, and no resolved third-party dependencies.
- The package is best understood as a self-contained demo that can be run directly from the command line or an IDE.

## Notes for Developers

- `main(String[] args)` ignores its arguments, so there is no CLI surface area to extend.
- If you add more Process API examples here, keep the package focused on process inspection and make each example runnable on its own.
- The current output uses `System.out.println`, which is fine for a demo but would likely be replaced with structured logging in production code.
- Since the code only prints the current PID, it is safe to run in most environments and does not alter process state.

## Source

- [`src/main/java/io/github/biezhi/java11/processor/Example.java`](src/main/java/io/github/biezhi/java11/processor/Example.java:17)