> For the complete documentation index, see [llms.txt](https://learn.qanplatform.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://learn.qanplatform.com/developers/qvm-multi-language-smart-contracts/docs-for-supported-languages/java-smart-contract/compiling-a-smart-contract-in-java.md).

# Compiling a smart contract in Java

Java is quite different from C/C++/Go/Rust since it’s required JRE to execute.\
The `javac` standard compiler produces JVM bytecode from Java source (class file) not a static executable binary.

In this sample, we’ll use GraalVM Native Image to produce static binary that suitable for deploying and executing under QVM environment.

```
# compile JVM bytecode (Java class file)
javac contract.java

# compile class file to static binary
native-image --static contract

# check the output binary size
wc -c contract
13644368 contract
```

### Compiling Java contract to static binary with the QVM compiler

We already supply a simple compiler container which will perform the most optimized build of turning above sample contract to a static binary which can be run by QVM.

Since you saved the previous sample contract as `contract.java` in your current directory, you can run the compiler like this:

```bash
docker run --rm -v $(pwd):/ws qanplatform/qvm-compiler-java
```

Afterwards you will end up with a statically linked linux ELF binary called "contract" in your current directory.

```shell
# checking output size of QVM compiler
ls -alh contract
-rwxr-xr-x  1 user  group    863K Jun 22 15:48 contract
```


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