nope.java

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;




public class Main {

    public static void main(String[] args) {
        if (args.length == 0) {
            System.out.println("Yo man. Give me filename.");
            System.exit(1);
        }

        try
        {
            // the line that reads the image file
            BufferedImage image = ImageIO.read(new File(args[0]));
            // work with the image here ...
        }
        catch (IOException e)
        {
            System.out.println("Image not found.");
            System.exit(1);
        }

        System.out.printf("Image resolution %dx%d", image.getWidth(), image.getWidth());

    }

}

works.java

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;




public class Main {

    public static void main(String[] args) {
        if (args.length == 0) {
            System.out.println("Yo man. Give me filename.");
            System.exit(1);
        }

        try
        {
            // the line that reads the image file
            BufferedImage image = ImageIO.read(new File(args[0]));
            // work with the image here ...

            System.out.printf("Image resolution %dx%d", image.getWidth(), image.getWidth());

        }
        catch (IOException e)
        {
            System.out.println("Image not found.");
            System.exit(1);
        }


    }

}