extension
The dot-and-letters ending of a file name, like .java.
A file extension is the suffix after the last dot in a file name; tools use it to recognize the kind of file (.java source, .class bytecode, .jar archive).
The dot-and-letters ending of a file name, like .java.
A file extension is the suffix after the last dot in a file name; tools use it to recognize the kind of file (.java source, .class bytecode, .jar archive).