Both SQLite and DuckDB are available as JARs containing native libraries for the database, for some range of platforms, and Java code which unpacks the library

Both SQLite and DuckDB are available as JARs containing native libraries for the database, for some range of platforms, and Java code which unpacks the library at runtime and uses it. org.duckdb:duckdb_jdbc:0.2.2 contains: libduckdb_java.so_linux_amd64 libduckdb_java.so_osx_amd64 libduckdb_java.so_windows_amd64 org.xerial:sqlite-jdbc:3.32.3.2 contains: org/sqlite/native/DragonFlyBSD/x86_64/libsqlitejdbc.so org/sqlite/native/FreeBSD/x86_64/libsqlitejdbc.so org/sqlite/native/Linux/aarch64/libsqlitejdbc.so org/sqlite/native/Linux-Alpine/x86_64/libsqlitejdbc.so org/sqlite/native/Linux/android-arm/libsqlitejdbc.so org/sqlite/native/Linux/arm/libsqlitejdbc.so org/sqlite/native/Linux/armv6/libsqlitejdbc.so org/sqlite/native/Linux/armv7/libsqlitejdbc.so org/sqlite/native/Linux/ppc64/libsqlitejdbc.so org/sqlite/native/Linux/x86_64/libsqlitejdbc.so org/sqlite/native/Linux/x86/libsqlitejdbc.so org/sqlite/native/Mac/x86_64/libsqlitejdbc.jnilib org/sqlite/native/Windows/x86_64/sqlitejdbc.dll org/sqlite/native/Windows/x86/sqlitejdbc.dll So that SQLite JAR is smaller, but covers a much wider range of platforms!