Implementation of Point Class for Image Manipulation in java

Question 5:

Implementation of Point Class for Image Manipulation.

Code:

Class:

Test.java

import java.awt.Toolkit;
import javax.swing.JFrame;
public class Test extends JFrame {
public Test()
{
add(new MyPanel());
setSize(Toolkit.getDefaultToolkit().getScreenSize());
setVisible(true);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
public static void main(String[] args) {
new Test();
}
}

Class:

MyPanel.java

import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import javax.swing.JPanel;
public class MyPanel extends JPanel {
@Override
protected void paintComponent(Graphics g) {
try {
MyPoint point= new MyPoint();
BufferedImage img = ImageIO.read(new File("java.jpg"));
g.drawImage(img, 0, 0,null );
for(int i=0;i<img.getWidth();i++)
for(int j=0;j<img.getHeight();j++)
{
point.setX(i);
point.setY(j);
int x= img.getRGB(point.getX(),point.getY());
img.setRGB(point.getX(), point.getY(), -x);
}
g.drawImage(img,img.getWidth(),0, null);
} catch (IOException e) {
System.out.println("Image Cannot be read."+e.getMessage());
}
}
}

Class:

MyPoint.java

public class MyPoint {
private int x;
private int y;
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
}

Output: