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  1. import java.awt.image.BufferedImage;
  2. import java.io.File;
  3. import java.io.FileNotFoundException;
  4. import java.io.IOException;
  5. //import java.util.Arrays;
  6. import java.util.Scanner;
  7.  
  8. import javax.imageio.ImageIO;
  9. public class LSB_encode {
  10. 	static final String MESSAGEFILE = "C:\\message.txt";
  11. 	static final String COVERIMAGEFILE = "C:\\cover.jpeg";	
  12. 	static final String STEGIMAGEFILE = "C:\\steg.png";
  13. 	public static void main(String[] args) throws Exception {
  14.  
  15. 		String contentOfMessageFile = (readMessageFile());
  16. int[] bits=bit_Msg(contentOfMessageFile);
  17. System.out.println("msg in file "+contentOfMessageFile);
  18. for(int i=0;i<bits.length;i++)
  19. System.out.print(bits[i]);
  20. System.out.println();
  21. BufferedImage theImage=readImageFile(COVERIMAGEFILE);
  22. hideTheMessage(bits, theImage);
  23.  
  24. }
  25.  
  26. public static String readMessageFile () throws FileNotFoundException{
  27. 	String contentOfMessageFile = "";
  28. 	File a = new File (MESSAGEFILE);
  29. 	Scanner scan = new Scanner (a);
  30. 	while (scan.hasNextLine()){
  31. 	String next = scan.nextLine();
  32. 	contentOfMessageFile += next;
  33. 	if (scan.hasNextLine()){
  34. 	contentOfMessageFile += "\n";
  35. 	}
  36. 	}
  37. 	scan.close();
  38. 	return contentOfMessageFile;
  39. 	}
  40. public static int[] bit_Msg(String msg){
  41. 	int j=0;
  42. 	int[] b_msg=new int[msg.length()*8];
  43. 	for(int i=0;i<msg.length();i++){
  44. 		int x=msg.charAt(i);
  45. 		String x_s=Integer.toBinaryString(x);
  46. 		while(x_s.length()!=8){
  47. 			x_s='0'+x_s;
  48. 		}
  49. 		System.out.println("dec value for "+x +" is "+x_s);
  50.  
  51. 		for(int i1=0;i1<8;i1++) {
  52. 		    b_msg[j] = Integer.parseInt(String.valueOf(x_s.charAt(i1)));
  53. 		    j++;
  54. 		  };
  55. 	}
  56.  
  57. 	return b_msg;
  58. }
  59. public static BufferedImage readImageFile(String COVERIMAGEFILE){
  60. BufferedImage theImage = null;
  61. File p = new File (COVERIMAGEFILE);
  62. try{
  63. theImage = ImageIO.read(p);
  64. }catch (IOException e){
  65. e.printStackTrace();
  66. System.exit(1);
  67. }
  68. return theImage;
  69. }
  70.  
  71.  
  72. public static void hideTheMessage (int[] bits, BufferedImage theImage) throws Exception{
  73. 	File f = new File (STEGIMAGEFILE);
  74. 	BufferedImage sten_img=null;
  75. 	int bit_l=bits.length/8;
  76. 	int[] bl_msg=new int[8];
  77. 	System.out.println("bit lent "+bit_l);
  78. 	String bl_s=Integer.toBinaryString(bit_l);
  79. 	while(bl_s.length()!=8){
  80. 		bl_s='0'+bl_s;
  81. 	}
  82. 	for(int i1=0;i1<8;i1++) {
  83. 		bl_msg[i1] = Integer.parseInt(String.valueOf(bl_s.charAt(i1)));
  84. 	  };
  85. int j=0;
  86. int b=0;
  87. int currentBitEntry=8;
  88.  
  89. for (int x = 0; x < theImage.getWidth(); x++){
  90. for ( int y = 0; y < theImage.getHeight(); y++){
  91. 	if(x==0&&y<8){
  92. 		int currentPixel = theImage.getRGB(x, y);	
  93. 		int ori=currentPixel;
  94. 		int red = currentPixel>>16;
  95. 		red = red & 255;
  96. 		int green = currentPixel>>8;
  97. 		green = green & 255;
  98. 		int blue = currentPixel;
  99. 		blue = blue & 255;
  100. 		String x_s=Integer.toBinaryString(blue);
  101. 		String sten_s=x_s.substring(0, x_s.length()-1);
  102. 		sten_s=sten_s+Integer.toString(bl_msg[b]);
  103.  
  104. 		//j++;
  105. 		int temp=Integer.parseInt(sten_s,2);
  106. 		int s_pixel=Integer.parseInt(sten_s, 2);
  107. 		int a=255;
  108. 		int rgb = (a<<24) | (red<<16) | (green<<8) | s_pixel;
  109. 		theImage.setRGB(x, y, rgb);
  110. 		//System.out.println("original "+ori+" after "+theImage.getRGB(x, y));
  111. 		ImageIO.write(theImage, "png", f);
  112. b++;
  113.  
  114. 	}
  115. 	else if (currentBitEntry < bits.length+8 ){
  116.  
  117. 	int currentPixel = theImage.getRGB(x, y);	
  118. 	int ori=currentPixel;
  119. 	int red = currentPixel>>16;
  120. 	red = red & 255;
  121. 	int green = currentPixel>>8;
  122. 	green = green & 255;
  123. 	int blue = currentPixel;
  124. 	blue = blue & 255;
  125. 	String x_s=Integer.toBinaryString(blue);
  126. 	String sten_s=x_s.substring(0, x_s.length()-1);
  127. 	sten_s=sten_s+Integer.toString(bits[j]);
  128. 	j++;
  129. 	int temp=Integer.parseInt(sten_s,2);
  130. 	int s_pixel=Integer.parseInt(sten_s, 2);
  131.  
  132. 	int a=255;
  133. 	int rgb = (a<<24) | (red<<16) | (green<<8) | s_pixel;
  134. 	theImage.setRGB(x, y, rgb);
  135. 	//System.out.println("original "+ori+" after "+theImage.getRGB(x, y));
  136. 	ImageIO.write(theImage, "png", f);
  137.  
  138. 	currentBitEntry++;	
  139. 	//System.out.println("curre "+currentBitEntry);
  140. 	}
  141. }
  142. }
  143. }
  144. }
  145.  
Compilation error #stdin compilation error #stdout 0s 0KB
comments (?)
stdin
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Standard input is empty
compilation info 
Main.java:9: error: class LSB_encode is public, should be declared in a file named LSB_encode.java
public class LSB_encode {
       ^
1 error
stdout
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Standard output is empty
https://ideone.com/922FUa
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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