![]() In Android Studio, in the Project pane, expand the Gradle Scripts entry. Notice that your new project tree has two adle files: One, (Project: MyApp), which is the file MyApp/adle and the other, (Module: app), which is the file MyApp/app/adle. For this example, suppose that your project folder is MyApp and the root package is. You’re going to modify your Android Studio Gradle files to download and use the Gradle plugin for JavaCC.įirst, create your Android Studio project, specifying a folder name and a root package name. Add the Gradle Plugin for JavaCCīefore we get too far: you don’t need to download and install JavaCC from the Gradle plugin for JavaCC contains everything you need. It’s also useful for those rare times when you need to create a concise, domain-specific language and JSON or XML is just too verbose. You’ll need a compiler-compiler whenever you find your Android program needs to parse a formal language that isn’t JSON, CSV, or XML, such as Legacy data from older devices and systems. Why use a compiler-compiler in an Android program? I needed one for a calculator program I wrote: the output of my JavaCC language correctly interprets C++ expressions that the phone user types. You can also find JavaCC tutorials here and there on the web. ![]() ![]() That tutorial will give you the background necessary to make sense of any modern compiler-compiler, including JavaCC. If you’re not familiar with compiler-compilers (compiler-generators) I recommend a Yacc/Lex tutorial such as Tom Neimann’s introduction to Yacc and Lex. I’m using JavaCC in a calculator Android app, to interpret expressions the user types into the app. JavaCC is an open source compiler-compiler that reads a specification for a custom computer language and generates Java code that parses instances of that language and either generates output code (a compiler) or executes what its input specifies (an interpreter). Android Studio is Google’s IDE (Integrated Development Environment) for creating Android applications.
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