modern-java Project

This project demonstrates what Java 17 brings over Java 11 in terms of language new features.

Including:

• String Class New Methods ✔️

• Records: immutability makes it easier to reason about; nice toString included ! ✔️

• Text blocks; including variable interpolation ✔️

• NullPointerException with insightful explanations ✔️

• sealed interfaces: list using the permits keyword what are all the implementations available for a given interface: the compiler will be able in switch expressions for example to infer all the different options on a type.

• instanceof with pattern match:

  if (robot instanceof Vacuum v){v.suck()}

Running the application in dev mode

You can run your application in dev mode that enables live coding using:

./mvnw compile quarkus:dev

NOTE: Quarkus now ships with a Dev UI, which is available in dev mode only at http://localhost:8080/q/dev/.

Packaging and running the application

The application can be packaged using:

./mvnw package

It produces the quarkus-run.jar file in the target/quarkus-app/ directory. Be aware that it’s not an über-jar as the dependencies are copied into the target/quarkus-app/lib/ directory.

If you want to build an über-jar, execute the following command:

./mvnw package -Dquarkus.package.type=uber-jar

The application is now runnable using java -jar target/quarkus-app/quarkus-run.jar.

Creating a native executable

You can create a native executable using:

./mvnw package -Pnative

Or, if you don't have GraalVM installed, you can run the native executable build in a container using:

./mvnw package -Pnative -Dquarkus.native.container-build=true

You can then execute your native executable with: ./target/modern-java-1.0.0-SNAPSHOT-runner

If you want to learn more about building native executables, please consult https://quarkus.io/guides/maven-tooling.html.

Provided Code

RESTEasy JAX-RS

Easily start your RESTful Web Services

Related guide section...