resize and crop using imagej -java version

gistfile1.txt

package imagej;

import ij.*;
import ij.io.*;
import ij.process.*;
import java.io.*;
import javax.imageio.*;
import javax.imageio.stream.*;
import java.awt.image.BufferedImage;


public class AppTest{
	
  public static void main(String [] args) throws Exception{
    String url = "http://imagej.nih.gov/ij/images/lena-std.tif";
    ImagePlus imp = IJ.openImage(url);

    cropAndResize(imp, 400, 100);
  }

  public static void cropAndResize(ImagePlus imp, int targetWidth, int targetHeight) throws Exception{
    ImageProcessor ip = imp.getProcessor();
    System.out.println("size1: "+ip.getWidth()+"x"+ip.getHeight());
    ip.setInterpolationMethod(ImageProcessor.BILINEAR);
    ip = ip.resize(targetWidth * 2, targetHeight * 2);
    System.out.println("size2: "+ip.getWidth()+"x"+ip.getHeight());

    int cropX = ip.getWidth() / 2;
    int cropY = ip.getHeight() / 2;
    ip.setRoi(cropX, cropY, targetWidth, targetHeight);
    ip = ip.crop();
    System.out.println("size3: "+ip.getWidth()+"x"+ip.getHeight());
    BufferedImage croppedImage = ip.getBufferedImage();

    System.out.println("size4: "+ip.getWidth()+"x"+ip.getHeight());
    new ImagePlus("croppedImage", croppedImage).show();

    ImageIO.write(croppedImage, "jpg", new File("cropped.jpg"));
  }
}

Hi, Do you have full code for the above? I would like to see the class for ImageProcessor & ImagePlus?
Thanks,
Jam