Computeiful

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

public class Image {

    public static Image read(String name) throws IOException {
        return new Image(ImageIO.read(new File(name)));
    }

Computeiful

    public static BufferedImage comp(BufferedImage image, float comp) throws IOException {
        ImageWriter jpgWriter = ImageIO.getImageWritersByFormatName("jpg").next();
        ImageWriteParam jpgWriteParam = jpgWriter.getDefaultWriteParam();
        jpgWriteParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
        jpgWriteParam.setCompressionQuality(comp);

        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        ImageOutputStream stream = ImageIO.createImageOutputStream(outputStream);
        jpgWriter.setOutput(stream);
        jpgWriter.write(null, new IIOImage(image, null, null), jpgWriteParam);