[Java] Tidy up. #7783

Job	Run time
Java Topology Tests (JDK 17, ubuntu-24.04)	2m 53s
C++ GCC 6 (Ubuntu 20.04)	9m 15s
Java 17 (ubuntu-24.04)	4m 29s
C++ GCC 7 (Ubuntu 20.04)	8m 30s
Java 17 (windows-latest)	7m 57s
C++ GCC 8 (Ubuntu 20.04)	8m 30s
Java 17 (macos-latest)	5m 53s
C++ GCC 9 (Ubuntu 20.04)	9m 30s
Java 21 (ubuntu-24.04)	4m 50s
Java 21 (windows-latest)	9m 31s
C++ GCC 10 (Ubuntu 20.04)	9m 23s
Java 21 (macos-latest)	5m 32s
C++ Clang 18 debug build	9m 18s
C++ Clang 9 (Ubuntu 20.04)	9m 59s
C++ Clang 10 (Ubuntu 20.04)	9m 57s
C++ Clang 13 (Ubuntu 24.04)	9m 39s
C++ Clang 11 (Ubuntu 20.04)	10m 9s
C++ Clang 14 (Ubuntu 24.04)	9m 10s
C++ GCC 11 (Ubuntu 24.04)	8m 42s
C++ Clang 12 (Ubuntu 20.04)	10m 9s
C++ Clang 15 (Ubuntu 24.04)	8m 58s
C++ GCC 12 (Ubuntu 24.04)	10m 4s
C++ Clang 16 (Ubuntu 24.04)	9m 9s
C++ GCC 13 (Ubuntu 24.04)	10m 35s
C++ Clang 17 (Ubuntu 24.04)	9m 39s
C++ GCC 14 (Ubuntu 24.04)	14m 42s
C++ Rocky 8 (10)	10m 4s
C++ Clang 18 (Ubuntu 24.04)	8m 53s
C++ MSVC (Windows)	16m 12s
C++ Xcode (macOS)	10m 14s
	4h 31m 46s

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