new ShortLookupTable(int offset, short[] data) : ShortLookupTable « java.awt.image « Java by API

1. Java by API
2. java.awt.image
3. ShortLookupTable

new ShortLookupTable(int offset, short[] data)

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);
  }
  
  
}
           
       

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