java foundation: common methods of Files

• . Files exists (): detects file path exists.
• . Files createFile (): create the file.
• . Files createDirectory (): Create a folder.
• . Files delete (): Delete a file or directory.
• . Files copy (): Copy the file.
• . Files move (): move the file.
• . Files size (): View the number of files.
• . Files read (): read the file.
• . Files write (): write to the file.