The sample Echo application in action
Before looking at the generated source code, let's take a quick look at the sample
Echo application in action. We can run it as usual by right-clicking on the project
and selecting Run .
A few seconds after clicking on Run , the browser pops up and automatically runs
The text Hello WebSocket! Is automatically prepopulated on the text input field.
Clicking on the button labeled Press me sends the text to a WebSocket server
endpoint, which simply sends the text back to the client. We can see the results
of this at the bottom of the preceding screenshot.
functions that generate WebSocket events and a corresponding Java class that
processes these events. We'll discuss the Java class first, and briefly cover the