Small refactoring. Improve examples. #45

Job	Run time
build (21, adopt, macos-latest)	5m 56s
build (21, adopt, ubuntu-latest)	3m 28s
build (21, adopt, windows-latest)	4m 0s
build (21, adopt-openj9, macos-latest)	6m 32s
build (21, adopt-openj9, ubuntu-latest)	5m 28s
build (21, adopt-openj9, windows-latest)	5m 23s
build (21, corretto, macos-latest)	6m 59s
build (21, corretto, ubuntu-latest)	3m 48s
build (21, corretto, windows-latest)	3m 57s
build (21, dragonwell, ubuntu-latest)	3m 40s
build (21, dragonwell, windows-latest)	5m 55s
build (21, liberica, macos-latest)	6m 5s
build (21, liberica, ubuntu-latest)	4m 25s
build (21, liberica, windows-latest)	3m 58s
build (21, microsoft, ubuntu-latest)	3m 26s
build (21, microsoft, windows-latest)	3m 56s
build (21, temurin, macos-latest)	5m 19s
build (21, temurin, ubuntu-latest)	3m 39s
build (21, temurin, windows-latest)	4m 11s
build (21, zulu, macos-latest)	6m 3s
build (21, zulu, ubuntu-latest)	3m 28s
build (21, zulu, windows-latest)	3m 51s
	1h 43m 27s

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