You can code a Java app in under 5 minutes to send an SMS using the Twilio API, requiring Java 8 or newer, a Java IDE, a Twilio account and phone number. The easiest way to call the Twilio API is with the Twilio Java Helper Library, which uses Apache Maven for dependency management. Creating a new project involves setting up a pom.xml file and adding dependencies, before writing the code in the src/main/java directory. The main method needs to authenticate the Twilio client using environment variables and then send an SMS by calling the API's create method with phone numbers and a message body. With this setup, you can start sending texts from your Java app.