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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
Gradle can also be used to run a single program. Here, we run the ReplacingStringTokenizer.java program in the strings chapter subdirectory:
gradlew :strings:ReplacingStringTokenizer
However, if the file name is unique throughout the book (the majority are), you can just give the program name, like this:
gradlew ReplacingStringTokenizer
Note that all these commands are run from the base directory where the example code is installed, and where you find the
gradlew script.
You can learn about other options by just typing gradlew with no arguments.