Determining a file’s extension in Java is a crucial task for various file-handling operations. A file extension is the suffix added to a filename, indicating the file’s format and content type. Knowing the file extension allows programs to identify the appropriate software or application required to open and process the file.
The process of checking file extensions in Java is relatively straightforward and can be achieved using various methods. One common approach is to utilize the getFileExtension()
method from the java.io.File
class. This method returns a string representing the file’s extension, including the leading period (.). For example, if the file is named "myfile.txt"
, the getFileExtension()
method will return the string ".txt"
.