MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.awt.image.BufferedImageOp;
import java.awt.image.LookupOp;
import java.awt.image.ShortLookupTable;

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

public class MainClass extends JPanel {

    public void paint(Graphics g) {
        short[] invert = new short[256];

        for (int i = 0; i < invert.length; i++)
            invert[i] = (short) (255 - i);

        BufferedImageOp invertOp = new LookupOp(new ShortLookupTable(0, invert), null);

        BufferedImage clone = invertOp.filter(createImage(), null);

        g.drawImage(clone, 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);
    }

}