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126 lines
2 KiB
Markdown
126 lines
2 KiB
Markdown
# Java workspace
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Containerized isolated development environment for Java programming language.
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## Why this images
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1. If you need self-hosted remote development environment.
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2. If you want to be one command away from coding in Java.
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## Start
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```
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docker run --name space-1 -d -p 8020-8040:8020-8040 --restart=always alnoda/java-workspace
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```
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open [localhost:8020](http://localhost:8020) in browser.
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## Features
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- Java
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- [Maven](https://maven.apache.org/)
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- [Gradle](https://gradle.org/)
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- [*Codeserver workspace features*](https://github.com/bluxmit/alnoda-workspaces/tree/main/workspaces/codeserver-workspace)
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## Links
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[__Alnoda docs__](https://docs.alnoda.org/)
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[__Alnoda Hub__](https://alnoda.org)
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## Hello world
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```
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java -version
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```
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Open IDE and create file `Main.java` with the following content
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```
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public class Main {
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public static void main(String[] args) {
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System.out.println("Hello World");
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}
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}
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```
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Use terminal to compile and execute
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```
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cd /home/project
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javac Main.java
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java Main
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```
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## Maven
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Maven helps with:
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- Making the build process easy
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- Providing a uniform build system
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- Providing quality project information
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- Encouraging better development practices
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Check Maven version in terminal
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```
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mvn -v
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```
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Build Java code
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```
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cp -r /home/abc/example /home/project/example
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cd /home/project/example
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mvn compile
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```
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This will run Maven, telling it to execute the compile goal. When it’s finished, you should find the compiled .class files in the target/classes directory.
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Run the package goal
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```
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mvn package
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```
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To execute the JAR file run
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```
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java -jar target/gs-maven-0.1.0.jar
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```
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*(taken from https://spring.io/guides/gs/maven/)*
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# Gradle
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Copy example project
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```
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cp -r /home/abc/example /home/project/example
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cd /home/project/example
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```
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Check Gradle installation, run Gradle from the command-line
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```
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cd /home/project/example
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gradle
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```
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Initialize Gradle
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```
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gradle init
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```
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Now that Gradle is installed, see what it can do
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```
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gradle tasks
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```
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Build project with Gradle
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```
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gradle build
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```
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