"j18.txt" marker to indicate that Java compiler target version 1.8 needed. "Stores.java" main Java program source "ExtractBookMacros.java" alt Java program source "ExtractDVDMacros.java" alt Java program source "ExtractElectronicMacros.java" alt Java program source "FindWebBooks.java" alt Java program source "TidyBookMacros.java" alt Java program source "TidyDVDMacros.java" alt Java program source "TidyElectronicMacros.java" alt Java program source