java implementation bug

[michaelortmann]

the java implementation produces different output:

$ cat data/huwiki-latest-pages-meta-current.xml | /usr/bin/time -v cpp/wordcount_clang >out-cpp.txt
$ cat data/huwiki-latest-pages-meta-current.xml | /usr/bin/time -v java -Xms2G -Xmx8G -classpath java:java/zah-0.6.jar WordCountOptimized >out-java.txt
$ cat data/huwiki-latest-pages-meta-current.xml | /usr/bin/time -v rust/wordcount/wordcount >out-rust.txt
$ wc -c out-*
1208432559 out-cpp.txt
1208432559 out-java.txt
1208432559 out-rust.txt
$ sha256sum out-*
ea81dd93280cfc6e64d0037ba63388cc0fad9f9ac325393c625e8838c8607ed5  out-cpp.txt
71ff0ac64c298edbaff79c81fe9c86e2bdcbc250b3df3a99781241d5db162eee  out-java.txt
ea81dd93280cfc6e64d0037ba63388cc0fad9f9ac325393c625e8838c8607ed5  out-rust.txt
$ java -version
openjdk version "21.0.2" 2024-01-16
OpenJDK Runtime Environment (build 21.0.2+13)
OpenJDK 64-Bit Server VM (build 21.0.2+13, mixed mode, sharing)