1 Standard interface: The methods in the interface are public by default, so there is no need to write public, and it is not wrong to write it.
2 Standard test code: The test code is uninstalled in the test package and tested by unit testing instead of the main function.
3 Canonical print test text: use
private static Logger logger = LogManager.getLogger(MergeRunnable.class ); logger.info
("Test content text");)
instead of
system.out.println()