# Compiler (javac)

The JDK tool that turns Java source code into bytecode.

## What is **Compiler (javac)** in Java?

**Compiler (javac)** — The JDK tool that turns Java source code into bytecode.

```java
class Greeting {
    String message = "Hello, Java!";
}
```

Level: Novice · [More Java terms at this level](https://www.ask-codey.com/glossary/subjects/java/novice)

Updated: September 27, 2026

Source: https://www.ask-codey.com/glossary/compiler-javac