Files.probeContentType() for MIME types

Files.probeContentType() for MIME types

The NIO.2 Files class includes a method to guess the MIME type (content type) of a file based on its extension or content.

How it Works

Files.probeContentType(path) uses the installed FileTypeDetector implementations of the platform to determine the type (e.g., "text/plain", "image/jpeg").

Java Example

import java.nio.file.*;
import java.io.IOException;

public class ContentTypeExample {
    public static void main(String[] args) throws IOException {
        Path path = Paths.get("test.html");
        String type = Files.probeContentType(path);
        System.out.println("Content Type: " + type);
    }
}

Output

Content Type: text/html (May vary by system)

Key Points

• Detect file MIME types
• Uses platform-specific detectors
• Useful for web applications
• Supports custom detectors