The file class is used in Java to explain the file operation in detail
We can know that the data stored in the program is temporary. When the program terminates, the data stored in the program will be lost. In order to permanently save the data created in the program, we need to store them on disk or in files of other permanent storage devices. These files can then be transmitted and read by other programs. This is the process of persistence.
And Java The file utility class library under the IO package can be used to operate these files. File encapsulates all the functions required to process the file system on the user's machine.
The official definition is: it represents the abstraction of file or directory path name.
It can be said that this class provides an abstract, system independent hierarchical path name view.