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Tianon Gravi
2014-09-15 10:49:57 -06:00
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@@ -2,11 +2,14 @@
- [`6b32`, `6` (*6/Dockerfile*)](https://github.com/docker-library/docker-java/blob/6cc25ee35281099423e521713f710d2549209600/6/Dockerfile)
- [`7u65`, `7`, `latest` (*7/Dockerfile*)](https://github.com/docker-library/docker-java/blob/6cc25ee35281099423e521713f710d2549209600/7/Dockerfile)
- [`8u20`, `8` (*8/Dockerfile*)](https://github.com/docker-library/docker-java/blob/6cc25ee35281099423e521713f710d2549209600/8/Dockerfile)
- [`8u40`, `8` (*8/Dockerfile*)](https://github.com/docker-library/docker-java/blob/00a9c5c080f2a5fd1510bc0716db7afe06cbd017/8/Dockerfile)
# What is Java?
Java is a concurrent, class-based, object-oriented language specifically designed to have as few implementation dependencies as possible. It is intended to allow application developers to "write once, run anywhere", meaning that code that runs on one platform does not need to be recompiled to run on another.
Java is a concurrent, class-based, object-oriented language specifically
designed to have as few implementation dependencies as possible. It is intended
to allow application developers to "write once, run anywhere", meaning that code
that runs on one platform does not need to be recompiled to run on another.
Java is a registered trademark of Oracle and/or its affiliates.
@@ -14,9 +17,11 @@ Java is a registered trademark of Oracle and/or its affiliates.
# How to use this image
## Start a java instance running your app
## Start a Java instance in your app
For this image, the most straight-forward use is to use a java container as both the build environment as well as the runtime environment. In your Dockerfile, you can do something along the lines of the following will compile and run your project.
The most straightforward way to use this image is to use a Java container as
both the build and runtime environment. In your `Dockerfile`, writing something
along the lines of the following will compile and run your project:
FROM java:7
COPY . /usr/src/myapp
@@ -24,36 +29,40 @@ For this image, the most straight-forward use is to use a java container as both
RUN javac Main.java
CMD ["java", "Main"]
Then run the commands to build and run the docker image.
You can then run and build the Docker image:
docker build -t my-java-app .
docker run -it --rm --name my-running-app my-java-app
## Compile your app inside the docker container.
## Compile your app inside the Docker container
It is not always appropriate to run your app inside a container. In instances where you only want to compile inside the docker instance, you can do something along the lines of the following.
There may be occasions where it is not appropriate to run your app inside a
container. To compile, but not run your app inside the Docker instance, you can
write something like:
docker run --rm -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp java:7 javac Main.java
This will add your current directory as a volume to the container, set the working directory to the volume, and run the command `javac Main.java` which will tell java to compile the code in Main.java and output the java class file to Main.class. Alternatively, if you have a make file, you can instead run the make command inside your container.
docker run --rm -v "$(pwd)":/usr/src/myapp -w /usr/src/myapp java:7 make
This will add your current directory as a volume to the container, set the
working directory to the volume, and run the command `javac Main.java` which
will tell Java to compile the code in `Main.java` and output the Java class file
to `Main.class`.
# User Feedback
## Issues
If you have any problems with, or questions about this image, please contact us
through a [GitHub issue](https://github.com/docker-library/java/issues) or via the IRC channel
`#docker-library` on [Freenode](https://freenode.net).
through a [GitHub issue](https://github.com/docker-library/java/issues) or via the IRC
channel `#docker-library` on [Freenode](https://freenode.net).
## Contributing
You are invited to contribute new features, fixes, or updates, large or small; we are
always thrilled to receive pull requests, and do our best to process them as fast as
we can.
You are invited to contribute new features, fixes, or updates, large or small;
we are always thrilled to receive pull requests, and do our best to process them
as fast as we can.
Before you start to code, we recommend discussing your plans through a
[GitHub issue](https://github.com/docker-library/java/issues), especially for more ambitious contributions. This gives
other contributors a chance to point you in the right direction, give you feedback on
your design, and help you find out if someone else is working on the same thing.
Before you start to code, we recommend discussing your plans
through a [GitHub issue](https://github.com/docker-library/java/issues), especially for more ambitious
contributions. This gives other contributors a chance to point you in the right
direction, give you feedback on your design, and help you find out if someone
else is working on the same thing.