> For the complete documentation index, see [llms.txt](https://educacion.gitbook.io/programacion/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://educacion.gitbook.io/programacion/ud1-introduccion-a-programacion/introducion-a-java/o-funcionamento-de-java.md).

# O funcionamento de Java

O código fonte dos nosos programas en Java, vaise escribir en un ou varios ficherios **.java.** Mais tarde este código vai ser compilado xerando un ficheiro **.class** que vay conter os **BYTECODE JAVA**

O **BYTECODE** vai a ser interpretado pola **máquina virtual** **JAVA,** mediante un **compilador JIT** que proporciona o **código máquina**. Este código máquina vai a ser executado polos compoñentes Hardware da máquina de destino.

<figure><img src="/files/14tUbFbHc8bhd8E30L02" alt=""><figcaption></figcaption></figure>

Ese ficheiro .class en **BYTECODE** é exactamente o mesmo, independentemente da plataforma. A **máquina virtual Java (JVM)** interpreta este bytecode para convertilo a **linguaxe máquina**. Lembra que os fabricantes utilizan distintos linguaxes máquina.

<figure><img src="/files/ecKwjaAJtYDbtZ7HUZkn" alt=""><figcaption></figcaption></figure>

## Esquema de compilación e execución en Java

<figure><img src="/files/nV3BTNuD0w3sfbt5Djwm" alt=""><figcaption></figcaption></figure>


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