How to mirror an image with Java.awt

I have an assignment to be done in Java, and I can't figure this out for the life of me. I'm supposed to use Graphics2D and Java.AWT. to mirror an image across both the x-axis and y-axis.

Current code is:

import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Color;
public class DrawingImages
private Picture newCanvas = null;
private Graphics g = null;
private Graphics2D g2 = null;
private Picture pic1 = null;
private Picture pic2 = null;
private Color color = null;
private Pixel sourcePixel, targetPixel = null;
private Color sourceColor, targetColor = null;

DrawingImages(Picture canv, Color col)
    Picture sourcePicture = new Picture("WashingtonMonument.jpg");
    newCanvas = canv;
    for(int y = sourcePicture.getHeight()-1; y >0; y=y-1)
        for(int x = sourcePicture.getWidth() - 1; x > 0; x = x - 1)
            sourcePixel = sourcePicture.getPixel(x,y);
            sourceColor = sourcePixel.getColor();
            targetPixel = newCanvas.getPixel(x+sourcePicture.getWidth() -1,y+sourcePicture.getHeight()- 1);

    g = newCanvas.getGraphics();
    g2 = (Graphics2D)g;  



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