OpenCV的java绑定显示图片

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.InputStream;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;

import org.opencv.core.Core;
import org.opencv.core.CvType;
import org.opencv.core.Mat;
import org.opencv.core.MatOfByte;
import org.opencv.core.Point;
import org.opencv.core.Scalar;
import org.opencv.highgui.Highgui;

public class Main {
public static void showResult(Mat img) {
//Imgproc.resize(img, img, new Size(640, 480));
MatOfByte matOfByte = new MatOfByte();
Highgui.imencode(".jpg", img, matOfByte);
byte[] byteArray = matOfByte.toArray();
BufferedImage bufImage = null;
try {
InputStream in = new ByteArrayInputStream(byteArray);
bufImage = ImageIO.read(in);
JFrame frame = new JFrame();
frame.getContentPane().add(new JLabel(new ImageIcon(bufImage)));
frame.pack();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}

public static void main(String[] args) {
System.out.println("Welcome to OpenCV " + Core.VERSION);
System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
//Mat m  = Mat.eye(3, 3, CvType.CV_8UC1);

Mat img  = Mat.ones(200, 200, CvType.CV_8UC3);
img.setTo(new Scalar(255, 255, 255));
//img.setTo(new Scalar(0, 0, 0));
Point p1 = new Point(10, 10);
Point p2 = new Point(150, 150);
//Rect rect = new Rect(p1, p2);
// img.create(200, 200, CvType.CV_16U);
Core.rectangle(img, p1, p2, new Scalar(255, 0, 0),5);
Core.line(img, new Point(30,30),new Point(100,100), new Scalar(0,255, 100));
String filename = "test.jpg";
Highgui.imwrite(filename, img);
showResult(img);

//System.out.println("m = " + img.dump());
}

}