To follow the steps in this tutorial, you will need the correct version of Java and a build tool. You can build Play projects with any Java build tool. Since sbt takes advantage of Play features such as auto-reload, the tutorial describes how to build the project with sbt.
Prerequisites include:
- Java Software Developer's Kit (SE) 1.8 or higher
- sbt 0.13.15 or higher (we recommend 1.2.3) Note: if you downloaded this project as a zip file from https://developer.lightbend.com, the file includes an sbt distribution for your convenience.
To check your Java version, enter the following in a command window:
java -version
To check your sbt version, enter the following in a command window:
sbt sbtVersion
If you do not have the required versions, follow these links to obtain them:
This example Play project It includes all Play components and an Akka HTTP server. The project is also configured with filters for Cross-Site Request Forgery (CSRF) protection and security headers.
To build and run the project:
-
Use a command window to change into the example project directory, for example:
cd play-java-hello-world-web -
Build the project. Enter:
sbt run. The project builds and starts the embedded HTTP server. Since this downloads libraries and dependencies, the amount of time required depends partly on your connection's speed. -
After the message
Server started, ...displays, enter the following URL in a browser: http://localhost:9000
The Play application responds: Welcome to the Hello World Tutorial!