Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 0

in this program i m getting Array index out of bound exception, and i could not know where it is happening.This program retrieves the data from image already stored by some another program(Encrypt.java not explained here). thank you for your help

import java.awt.Graphics; import java.awt.image.BufferedImage; import java.io.File; import java.io.*; import javax.imageio.ImageIO; import javax.swing.JFrame; import javax.swing.JPanel; import java.math.BigInteger; public class Decrypt extends JFrame { /** * */ private static final long serialVersionUID = 1L; public static void main(String[] args) throws Exception { new Decrypt(); } public Decrypt() throws Excenter code hereeption { setTitle("Color"); setSize(300, 300); setLocationRelativeTo(null); setDefaultCloseOperation(3); add(new PaintPanel(ImageIO.read(new File("src/outputImages/s2.bmp")))); setVisible(true); } class PaintPanel extends JPanel { /** * */ private static final long serialVersionUID = 1L; private BufferedImage image; PaintPanel(BufferedImage image) { this.image = image; } public void paintComponent(Graphics g) { File file = new File("src/input.txt"); int length=0, insertCounter; String strFileContent=""; try { //create FileInputStream object FileInputStream fin = new FileInputStream(file); /* * Create byte array large enough to hold the content of the file. * Use File.length to determine size of the file in bytes. */ byte fileContent[] = new byte[(int)file.length()]; /* * To read content of the file in byte array, use * int read(byte[] byteArray) method of java FileInputStream class. * */ fin.read(fileContent); //create string from byte array strFileContent = new String(fileContent); System.out.println("File content : "+ strFileContent ); BigInteger bi = new BigInteger(fileContent); // Format to binary strFileContent = bi.toString(2); // 100100000111111110000 length=strFileContent.length(); //thia variable contains the length of binary string //System.out.println(length+" File content in binary: "+ strFileContent ); } catch(Exception e){ System.out.println("File not found" + e); } File file1 = new File("input.txt"); byte outputBytes[] = new byte[(int)file1.length()]; insertCounter=0; int localCounter=0; byte tempbyte=0x00; for (int h = 0; h <=image.getHeight()-3; h=h+3) { for (int w = 0; w <=image.getWidth()-3; w=w+3) { int whiteParity=0; for(int i=0;i<3;i++){ for(int j=0;j<3;j++){ int rgb = image.getRGB(w+j,h+ i); if (rgb == -1) whiteParity++; } } /* if(WhitePArity==1 ||WhitePArity==3 ||WhitePArity==5 ||WhitePArity==7 ||WhitePArity==9){ }*/ if( image.getRGB(w+1,h+1)==-1){ if(localCounter==0) tempbyte=(byte)(tempbyte|0x80); if(localCounter==1) tempbyte=(byte)(tempbyte|0x40); if(localCounter==2) tempbyte=(byte)(tempbyte|0X20); if(localCounter==3) tempbyte=(byte)(tempbyte|0x10); if(localCounter==4) tempbyte=(byte)(tempbyte|0x08); if(localCounter==5) tempbyte=(byte)(tempbyte|0x04); if(localCounter==6) tempbyte=(byte)(tempbyte|0x02); if(localCounter==7) tempbyte=(byte)(tempbyte|0x01); } localCounter++; if(localCounter==8){ outputBytes[insertCounter]=tempbyte; insertCounter++; localCounter=0; tempbyte=(byte)(tempbyte & 0x00); } } String outputString=new String(outputBytes); String strFilePath = "output.txt"; try{ FileWriter fstream = new FileWriter(strFilePath); BufferedWriter out = new BufferedWriter(fstream); out.write(outputString); //Close the output stream out.close(); } catch(Exception e){ System.out.println("File not found" + e); } } g.drawImage(image, 0, 0, this); } } }