Encoding Screen
For the Above UI, we will create a EncodeClass, file naming encode.java Class.
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.image.BufferedImage;
import javax.imageio.ImageIO;
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;
public class EncodeClass {
int width, panelWidth, panelHeight;// =1280;
int height; // =720;
JFrame frame;
JPanel actionPanel;
JFrame encodingFrame;
JLabel outputImage;
JButton open = new JButton("Open"), embed = new JButton("Embed"), save = new JButton("Save into new file"),
reset = new JButton("Reset");
JTextArea message = new JTextArea(10, 3);
BufferedImage sourceImage = null, embeddedImage = null;
//Constructor
public EncodeClass(int width, int height, JFrame dashboardFrame) {
this.width = width;
this.height = height;
this.encodingFrame = dashboardFrame;
getEnodingView(width, height);
}
}
//Main Encoding View
private void getEnodingView(int width, int height) {
// frame with control options
frame = new JFrame();
Util.centeredFrame(frame, width, height, "Steganography");
//frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// loginFrame.setResizable(false);
ImageIcon icon = new ImageIcon("ic_lock_black.png");
frame.setIconImage(icon.getImage());
// frame.setLayout(null);
frame.setResizable(false);
frame.addWindowListener(new java.awt.event.WindowAdapter() {
@Override
public void windowClosing(java.awt.event.WindowEvent windowEvent) {
frame.dispose();
encodingFrame.setVisible(true);
}
});
Container frameContainer = frame.getContentPane();
frameContainer.setBackground(Color.green);
int frameControllerSize = (int) (height * 5.7 / 100);
// Changeable According to What size of screen You Want?
int containerWidth = width * 94 / 100;
int containerHeight = height * 90 / 100;
panelWidth = containerWidth * 98 / 100;
panelHeight = containerHeight * 96 / 100;
int posX = width / 2 - panelWidth / 2 - 8;
int posY = height / 2 - panelHeight / 2 - frameControllerSize / 2;
// frame without control options
JPanel panel = new JPanel();
panel.setLayout(null);// new BorderLayout());
// panel.setOpaque(false);
panel.setBackground(Color.decode("#FFFFFF"));
panel.setSize(new Dimension(panelWidth, panelHeight));
panel.setLocation(posX, posY);
frameContainer.add(panel);
// for Rounded Background
posX = width / 2 - containerWidth / 2 - 8;
posY = height / 2 - containerHeight / 2 - frameControllerSize / 2;
JComponent jcomponent = new Background(posX, posY, containerWidth, containerHeight);
jcomponent.setLayout(null);
frameContainer.add(jcomponent, BorderLayout.CENTER);
// for heading Layout
posY = panelHeight * 2 / 100;
Font headingFont = new Font("Serif", Font.PLAIN, 30);
// header
// borderline = BorderFactory.createLineBorder(Color.black);
JLabel heading_text = new JLabel("Steganography");
heading_text.setHorizontalAlignment(JLabel.CENTER);
heading_text.setVerticalAlignment(JLabel.CENTER);
heading_text.setBackground(Color.decode("#80c2b2"));
heading_text.setForeground(Color.black);
heading_text.setFont(headingFont);
heading_text.setBounds(0, 0, panelWidth, panelHeight / 9);
panel.add(heading_text);
headingFont = new Font("Serif", Font.PLAIN, 15);
JLabel heading_text_minor = new JLabel("Encoding");
heading_text_minor.setHorizontalAlignment(JLabel.CENTER);
heading_text_minor.setVerticalAlignment(JLabel.CENTER);
heading_text_minor.setBackground(Color.decode("#80c2b2"));
heading_text_minor.setForeground(Color.black);
heading_text_minor.setFont(headingFont);
heading_text_minor.setBounds(0, panelHeight * 6 / 100, panelWidth, panelHeight / 9);
panel.add(heading_text_minor);
panel.add(Util.getSeparator(0, panelHeight / 7, panelWidth, 5, "000000"));
///////////
int infoPanelWidth = panelWidth * 40 / 100;
JPanel infoPanel = new JPanel();
infoPanel.setLayout(null);
infoPanel.setBackground(Color.WHITE);
infoPanel.setBounds(panelWidth / 40, panelHeight * 22 / 100, infoPanelWidth, panelHeight * 70 / 100);
infoPanel.setBorder(Util.getTitledBorder(16, "Details"));
panel.add(infoPanel, BorderLayout.CENTER);
Border loweredetched = BorderFactory.createEtchedBorder(EtchedBorder.LOWERED);
TitledBorder secretMsgTitle = BorderFactory.createTitledBorder(loweredetched, "Secret Message");
secretMsgTitle.setTitleJustification(TitledBorder.LEFT);
int fieldWidth = panelWidth / 4;
// message = JTextArea(10,3);
message.setBounds((infoPanelWidth) / 2 - (fieldWidth) / 2, panelHeight * 10 / 100, fieldWidth,
panelHeight * 30 / 100);
message.setBorder(secretMsgTitle);
infoPanel.add(message);
int posy = panelHeight * 50 / 100;
open = new JButton(new ImageIcon(((new ImageIcon("images/btn.png")).getImage()).getScaledInstance(120, 30,
java.awt.Image.SCALE_SMOOTH)));
open.setBackground(Color.BLUE);
open.setBounds((infoPanelWidth * 20 / 100) - 60, posy, 120, 30);
open.setBorder(null);
open.setLayout(null);
open.setContentAreaFilled(false);
open.setOpaque(false);
infoPanel.add(open);
open.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
openImage();
}
});
JLabel text = new JLabel("Open");
text.setHorizontalAlignment(JLabel.CENTER);
text.setBackground(Color.decode("#80c2b2"));
text.setForeground(Color.black);
text.setFont(new java.awt.Font("Serif", 0, 20));
text.setBounds(0, -2, 120, 30);
open.add(text);
save = new JButton(new ImageIcon(((new ImageIcon("images/btn.png")).getImage()).getScaledInstance(120, 30,
java.awt.Image.SCALE_SMOOTH)));
save.setBackground(Color.ORANGE);
save.setBounds((infoPanelWidth) / 2 - 60, posy, 120, 30);
save.setBorder(null);
save.setLayout(null);
save.setContentAreaFilled(false);
save.setOpaque(false);
infoPanel.add(save);
save.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
saveImage();
}
});
text = new JLabel("Save");
text.setHorizontalAlignment(JLabel.CENTER);
text.setBackground(Color.decode("#80c2b2"));
text.setForeground(Color.black);
text.setFont(new java.awt.Font("Serif", 0, 20));
text.setBounds(0, -2, 120, 30);
save.add(text);
reset = new JButton(new ImageIcon(((new ImageIcon("images/btn.png")).getImage()).getScaledInstance(120, 30,
java.awt.Image.SCALE_SMOOTH)));
reset.setBackground(Color.GRAY);
reset.setBorder(null);
reset.setLayout(null);
reset.setContentAreaFilled(false);
reset.setOpaque(false);
reset.setBounds(infoPanelWidth * 80 / 100 - 60, posy, 120, 30);
infoPanel.add(reset);
reset.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
resetInterface();
}
});
text = new JLabel("Reset");
text.setHorizontalAlignment(JLabel.CENTER);
text.setBackground(Color.decode("#80c2b2"));
text.setForeground(Color.black);
text.setFont(new java.awt.Font("Serif", 0, 20));
text.setBounds(0, -2, 120, 30);
reset.add(text);
embed = new JButton(new ImageIcon(((new ImageIcon("images/encode_btn.jpg")).getImage()).getScaledInstance(120,
30, java.awt.Image.SCALE_SMOOTH)));
embed.setBackground(Color.GRAY);
embed.setFont(new java.awt.Font("Serif", 0, 50));
embed.setBounds((infoPanelWidth) / 2 - 60, posy + panelHeight * 10 / 100, 120, 30);
embed.setBorder(null);
embed.setLayout(null);
embed.setContentAreaFilled(false);
embed.setOpaque(false);
infoPanel.add(embed);
embed.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
embedMessage();
}
});
text = new JLabel("Encode");
text.setHorizontalAlignment(JLabel.CENTER);
text.setBackground(Color.decode("#80c2b2"));
text.setForeground(Color.black);
text.setFont(new java.awt.Font("Serif", 0, 20));
text.setBounds(0, -2, 120, 30);
embed.add(text);
///////////////// Action Layout
actionPanel = new JPanel();
actionPanel.setLayout(null);
actionPanel.setBackground(Color.WHITE);
actionPanel.setBounds(panelWidth * 3 / 4 - (panelWidth * 45 / 100) / 2, panelHeight * 20 / 100,
panelWidth * 45 / 100, panelHeight * 75 / 100);
actionPanel.setBorder(Util.getTitledBorder(16, "Output"));
panel.add(actionPanel, BorderLayout.CENTER);
text = new JLabel("Image for Encoding");
text.setHorizontalAlignment(JLabel.CENTER);
text.setBackground(Color.decode("#80c2b2"));
text.setForeground(Color.black);
text.setFont(new java.awt.Font("Serif", 0, 30));
text.setBounds((panelWidth * 45 / 100) / 2 - (panelWidth * 30 / 100) / 2, panelHeight * 5 / 100,
panelWidth * 30 / 100, 40);
actionPanel.add(text);
int imgW = panelWidth * 40 / 100;
int imgH = panelHeight * 50 / 100;
outputImage = new JLabel("Select image to encode");
outputImage.setHorizontalAlignment(JLabel.CENTER);
outputImage.setFont(new java.awt.Font("Serif", 0, 14));
outputImage.setBounds((panelWidth * 45 / 100) / 2 - imgW / 2, panelHeight * 18 / 100, imgW, imgH);
actionPanel.add(outputImage);
frame.setVisible(true);
}
Now, we will create the method for importing image from the file.
private void openImage() {
java.io.File f = showFileDialog(true);
try {
sourceImage = ImageIO.read(f);
int imgW = panelWidth * 40 / 100;
int imgH = panelHeight * 55 / 100;
ImageIcon backround_img1 = new ImageIcon(((new ImageIcon(sourceImage)).getImage()).getScaledInstance(imgW,
imgH, java.awt.Image.SCALE_SMOOTH));
Image img1 = backround_img1.getImage();
Image temp_img1 = img1.getScaledInstance(imgW, imgH, Image.SCALE_SMOOTH);
backround_img1 = new ImageIcon(temp_img1);
outputImage.setIcon(backround_img1);
outputImage.setText("");
frame.validate();
} catch (Exception ex) {
ex.printStackTrace();
}
}
private java.io.File showFileDialog(final boolean open) {
JFileChooser fc = new JFileChooser("Open an image");
javax.swing.filechooser.FileFilter ff = new javax.swing.filechooser.FileFilter() {
public boolean accept(java.io.File f) {
String name = f.getName().toLowerCase();
if (open)
return f.isDirectory() || name.endsWith(".jpg") || name.endsWith(".jpeg") || name.endsWith(".png")
|| name.endsWith(".gif") || name.endsWith(".tiff") || name.endsWith(".bmp")
|| name.endsWith(".dib");
return f.isDirectory() || name.endsWith(".png") || name.endsWith(".bmp");
}
public String getDescription() {
if (open)
return "Image (*.jpg, *.jpeg, *.png, *.gif, *.tiff, *.bmp, *.dib)";
return "Image (*.png, *.bmp)";
}
};
fc.setAcceptAllFileFilterUsed(false);
fc.addChoosableFileFilter(ff);
java.io.File f = null;
if (open && fc.showOpenDialog(frame) == fc.APPROVE_OPTION)
f = fc.getSelectedFile();
else if (!open && fc.showSaveDialog(frame) == fc.APPROVE_OPTION)
f = fc.getSelectedFile();
return f;
}
///Embed Message Code
private void embedMessage() {
if (sourceImage != null) {
String mess = message.getText();
embeddedImage = sourceImage.getSubimage(0, 0, sourceImage.getWidth(), sourceImage.getHeight());
embedImageMessage(embeddedImage, mess);
JOptionPane.showMessageDialog(frame, "Your Secret message has been Encoded !", "Encoded Successfully",
JOptionPane.INFORMATION_MESSAGE);
} else {
JOptionPane.showMessageDialog(frame, "Select your Image first", "Failed", JOptionPane.INFORMATION_MESSAGE);
}
}
private void embedImageMessage(BufferedImage img, String mess) {
int messageLength = mess.length();
int imageWidth = img.getWidth(), imageHeight = img.getHeight(), imageSize = imageWidth * imageHeight;
if (messageLength * 8 + 32 > imageSize) {
JOptionPane.showMessageDialog(frame, "Message is too long for the chosen image", "Message too long!",
JOptionPane.ERROR_MESSAGE);
return;
}
embedInteger(img, messageLength, 0, 0);
byte b[] = mess.getBytes();
for (int i = 0; i < b.length; i++)
embedByte(img, b[i], i * 8 + 32, 0);
}
private void embedInteger(BufferedImage img, int n, int start, int storageBit) {
int maxX = img.getWidth(), maxY = img.getHeight(), startX = start / maxY, startY = start - startX * maxY,
count = 0;
for (int i = startX; i < maxX && count < 32; i++) {
for (int j = startY; j < maxY && count < 32; j++) {
int rgb = img.getRGB(i, j), bit = getBitValue(n, count);
rgb = setBitValue(rgb, storageBit, bit);
img.setRGB(i, j, rgb);
count++;
}
}
}
private void embedByte(BufferedImage img, byte b, int start, int storageBit) {
int maxX = img.getWidth(), maxY = img.getHeight(), startX = start / maxY, startY = start - startX * maxY,
count = 0;
for (int i = startX; i < maxX && count < 8; i++) {
for (int j = startY; j < maxY && count < 8; j++) {
int rgb = img.getRGB(i, j), bit = getBitValue(b, count);
rgb = setBitValue(rgb, storageBit, bit);
img.setRGB(i, j, rgb);
count++;
}
}
}
private int getBitValue(int n, int location) {
int v = n & (int) Math.round(Math.pow(2, location));
return v == 0 ? 0 : 1;
}
private int setBitValue(int n, int location, int bit) {
int toggle = (int) Math.pow(2, location), bv = getBitValue(n, location);
if (bv == bit)
return n;
if (bv == 0 && bit == 1)
n |= toggle;
else if (bv == 1 && bit == 0)
n ^= toggle;
return n;
}
//Save Embedded Image
private void saveImage() {
if (embeddedImage == null) {
JOptionPane.showMessageDialog(frame, "No message has been embedded!", "Nothing to save",
JOptionPane.ERROR_MESSAGE);
return;
}
java.io.File f = showFileDialog(false);
String name = f.getName();
String ext = name.substring(name.lastIndexOf(".") + 1).toLowerCase();
if (!ext.equals("png") && !ext.equals("bmp") && !ext.equals("dib")) {
ext = "png";
f = new java.io.File(f.getAbsolutePath() + ".png");
}
try {
if (f.exists())
f.delete();
ImageIO.write(embeddedImage, ext.toUpperCase(), f);
} catch (Exception ex) {
ex.printStackTrace();
}
JOptionPane.showMessageDialog(frame, "Your Encoded image has been saved !", "Saved Successfully",
JOptionPane.INFORMATION_MESSAGE);
}
After saving the embedded image, let's reset the all the data.
//Reset UI
private void resetInterface() {
outputImage.setIcon(null);
outputImage.setText("Select image to decode");
message.setText("");
sourceImage = null;
embeddedImage = null;
frame.validate();
}
Lastly, we will create a method for returning frame.
public Window getFrameRef() {
// TODO Auto-generated method stub
return frame;
}
We have successfully created the Encoding screen with functional code.
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