AWT libraries using Java 1.6 on Linux Server in a datacenter

I need to create and store thumbnails (of images from the web) and store them on the server. Can I use the awt libraries (as listed below) on a linux server running in a datacenter (without a monitor)? I do not know if the server has a graphics card or needs one for these libraries to work...

import java.awt.GraphicsConfiguration;
import java.awt.GraphicsDevice;
import java.awt.GraphicsEnvironment;
import java.awt.Graphics2D;
import java.awt.geom.AffineTransform;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException开发者_StackOverflow中文版;
import java.io.OutputStream;
import java.io.FileOutputStream;
import java.net.URL;

import javax.imageio.ImageIO;

import org.springframework.stereotype.Service;

import com.sun.image.codec.jpeg.ImageFormatException;
import com.sun.image.codec.jpeg.JPEGCodec;
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import java.awt.Color;

You can as long as you run java in headless mode:

java -Djava.awt.headless=true your.MainClass