Java: Added examples to documentation for StringCommands. #753

Job	Run time
lint-rust	3m 43s
lint-rust	3m 43s
build-amazonlinux-latest	0s
build-amazonlinux-latest	0s
build-and-test-java-client (11, 6.2.14, ubuntu-latest)	4m 40s
build-and-test-java-client (11, 6.2.14, ubuntu-latest)	4m 40s
build-and-test-java-client (11, 6.2.14, macos-latest)	1m 39s
build-and-test-java-client (11, 6.2.14, macos-latest)	9m 25s
build-and-test-java-client (11, 7.2.3, ubuntu-latest)	5m 42s
build-and-test-java-client (11, 7.2.3, ubuntu-latest)	5m 42s
build-and-test-java-client (11, 7.2.3, macos-latest)	14m 35s
build-and-test-java-client (11, 7.2.3, macos-latest)	14m 35s
build-and-test-java-client (17, 6.2.14, ubuntu-latest)	4m 46s
build-and-test-java-client (17, 6.2.14, ubuntu-latest)	4m 46s
build-and-test-java-client (17, 6.2.14, macos-latest)	10m 22s
build-and-test-java-client (17, 6.2.14, macos-latest)	10m 22s
build-and-test-java-client (17, 7.2.3, ubuntu-latest)	5m 7s
build-and-test-java-client (17, 7.2.3, ubuntu-latest)	5m 7s
build-and-test-java-client (17, 7.2.3, macos-latest)	8m 23s
build-and-test-java-client (17, 7.2.3, macos-latest)	8m 23s
	2h 5m 40s

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