Плиз помогите розобрать что делает код
| Код |
package javaapplication2;
import javax.swing.*;
import java.io.File;
import java.io.RandomAccessFile;
/**
* Created by I0_Bit on 12.11.2015.
*/
public class JavaApplication2
{
public static void main(String[] args)
{
byte n[] = new byte[8];
int c = 11;
n[0]=1;
n[1]=2;
for (int i = 2; i < 8; i++)
{
n[i] =( byte)( (n[i-1] + n[i-2]) % c);
// System.out.print(n[i]+" ");
}
int replace[] = {n[0], n[1], n[2], n[3], 10010010, 01001001, 00100100,
01001001, 00100100, 10010010,00100100, 10010010, 01001001, 00000000, 00000000, 00000000 , 00110011, 00110011, 00110011,
01100110, 01100110, 01100110, 10011001, 10011001, 10011001 , 11001100, 11001100, 11001100 , 11111111, 11111111, 11111111 ,
10010010, 01001001, 00100100 , 01001001, 00100100, 10010010 , 00100100, 10010010, 01001001 , 01101101, 10110110, 11011011 ,
10110110, 11011011, 01101101 , 11011011, 01101101, 10110110 , n[4], n[5], n[6], n[7]};
byte b1=0;
byte b2[] = new byte[3];
try
{
JFileChooser dialog = new JFileChooser();
dialog.showOpenDialog(dialog);
File file1 = dialog.getSelectedFile();
RandomAccessFile file = new RandomAccessFile(file1, "rw");
long count = file1.length();
for(;count%3!=0;count++)
{
}
System.out.println("Total found = " + count + " characters!");
for (int i = 0; i < 41; i++)
{
long ptr = 0;
if (i <=3 || (i >=13 && i <=18) || i >=37)
{
b1 = (byte) replace[i];
}
else
{
for (int j = 0; j < 3; j++)
{
b2[j] = (byte) replace[i++];
}
}
for (ptr=0; ptr < count;)
{
if (i <=3 || (i >=13 && i <=18) || i >=37)
{
//file.seek(ptr);
file.writeByte(b1);
ptr++;// = file.getFilePointer();
}
else
{
file.writeByte(b2[0]);
file.writeByte(b2[1]);
file.writeByte(b2[2]);
ptr=ptr+3;
}
}
file.seek(0);
}
file.close();
// file1.delete();
}
catch (Exception ex)
{
String error = ex.toString();
System.out.println(error);
}
}
}
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