MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.Graphics;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.awt.image.FilteredImageSource;
import java.awt.image.RGBImageFilter;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class MainClass extends JPanel {

    public void paint(Graphics g) {
        NegativeFilter nf = new NegativeFilter();

        Image i = createImage(new FilteredImageSource(createImage().getSource(), nf));

        g.drawImage(i, 20, 20, this);
    }

    private BufferedImage createImage() {
        BufferedImage bufferedImage = new BufferedImage(200, 200, BufferedImage.TYPE_INT_RGB);
        Graphics g = bufferedImage.getGraphics();
        g.drawString("www.java2s.com", 20, 20);

        return bufferedImage;
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.getContentPane().add(new MainClass());

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(200, 200);
        frame.setVisible(true);
    }

}

class NegativeFilter extends RGBImageFilter {
    public NegativeFilter() {
        canFilterIndexColorModel = true;
    }

    public int filterRGB(int x, int y, int rgb) {
        return rgb ^ 0x00ffffff;
    }
}