To compile and run these programs, you only need JDK 8 installed. Invoking gradlew will automatically download and install Gradle. Gradle will also install all additional libraries necessary to compile and run the Java examples in the book.

To compile everything, the command is:

gradlew build

To run everything (including compiling if necessary), the command is:

gradlew run

To compile only a single chapter (including dependencies), use for example:

gradlew :strings:build

To run only a single chapter, say:

gradlew :strings:run