java.net.FileNameMap is a Java Interface. FileNameMap interface is a part of the java.net package. FileNameMap provides a mechanism to map between a file name and a MIME type string. We can use FileNameMap getContentTypeFor method to get the MIME type of the specified file.
Syntax:
public interface FileNameMap
Method of java.net.FileNameMap Interface
The FileNameMap Interface consists of only one method named as:
getContentTypeFor(String fileName) Method – It is a part of java.net.FileNameMap interface. As the method name suggests, getContentFor is used to get the MIME type in String format for a specific file.
Syntax:
String getContentTypeFor(String fileName)
Method Parameter: This method has only one parameter which is of String Type.
Method Return Type: It has a String return type and will return the MIME type for the file.
How to invoke getContentTypeFor method?
Step 1: It load fileNameMap from a data file using URLConnection.getFileNameMap() static method
FileNameMap fileNameMap = URLConnection.getFileNameMap();
Step 2: It invokes FileNameMap.getContentTypeFor(String fileName) method and pass on the fileName to get it’s MIME typeÂ
String mimeType = fileNameMap.getContentFor(String nameOfTheFile);
Example: Below is the java program for a better understanding of the FileNameMap interface and then to get the MIME type of the file using FileNameMap getContentTypeFor() method.
Java
// Java program to demsonstrate the// working of the FileNameMap interface  import java.io.*;import java.net.*;  class GFG {    public static void main(String[] args)    {        try {            FileNameMap fileNameMap                = URLConnection.getFileNameMap();                        // specify all the fileName whose            // MIME type we need to know            String firstFileName = "tmp.txt";            String secondFileName = "profile.png";            String thirdFileName = "gfg.mp4";              // call getContentTypeFor() method for each            // fileName to get it's MIME type , method will            // return null if fileName is invalid            String firstFileMimeType = fileNameMap.getContentTypeFor(firstFileName);            String secondFileMimeType = fileNameMap.getContentTypeFor(secondFileName);            String thirdFileMimeType = fileNameMap.getContentTypeFor(thirdFileName);              // print all the MIME types            System.out.println("Mime type of "                               + firstFileName + " is "                               + firstFileMimeType);            System.out.println("Mime type of "                               + secondFileName + " is "                               + secondFileMimeType);            System.out.println("Mime type of "                               + thirdFileName + " is "                               + thirdFileMimeType);        }        catch (Exception e) {            System.out.println("Some Exception "                               + e.getMessage());        }    }} |
Mime type of tmp.txt is text/plain Mime type of profile.png is image/png Mime type of gfg.mp4 is video/mp4
