Simple Image Resizer

import java.io.*;
import java.awt.*;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;


@SuppressWarnings({"WeakerAccess", "SameParameterValue"})
public class Main {
    public static void main(String[] args) throws IOException {
        System.out.println("Enter filename");
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String filename = reader.readLine();
        BufferedImage oldImage = ImageIO.read(new File(filename));
        BufferedImage newImage = resize(oldImage, 480, 360);
        ImageIO.write(newImage, "PNG", new File(filename + "_new.png"));

        System.out.println("Done");
        reader.close();
    }

    public static BufferedImage resize(BufferedImage img, int newW, int newH) {
        Image tmp = img.getScaledInstance(newW, newH, Image.SCALE_SMOOTH);
        BufferedImage dimg = new BufferedImage(newW, newH, BufferedImage.TYPE_INT_ARGB);

        Graphics2D g2d = dimg.createGraphics();
        g2d.drawImage(tmp, 0, 0, null);
        g2d.dispose();

        return dimg;
    }
}