Open https://github.com/pluribusdemoteam/codespace-java/codespaces
Click "New code space" dropdown
Click "Create codespace" button
Select appropriate machine type
Click "Create codespace" button
Open "Explorer" on side bar, navigate to DemoApplication.java, right click and select option "Run Java" (If prompted for enabling Java language server in standard mode, say Yes) Alternate option- Side bar option "Run and Debug" can be used to run DemoApplication.java, this mode allows debugging/stop/starting app.
Once spring boots up tomcat, popup will display to open browser.
Click on "Open in browser"