Getting pixels from jtextarea

Hi, I have a jtextarea which I want to analyze by extracting from it all of the pixels (pixel by pixel in row order). I want to have arrays of pixels representing the black pixels in the jtextarea (each array represents a row).
I'll be happy to recieve any counsel.
Thanks

this should help
http://java.sun.com/j2se/1.3/docs/guide/2d/spec/j2d-image.fm3.html

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import java.util.Vector;
import java.awt.event.*;
import java.awt.*;
import java.awt.event.*;
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private final String userName = "labmanage";
private final String password = "labmanage";
private final String server = "jdbc:mysql://svr.corp.com/labmanage";
private final String driver = "com.mysql.jdbc.Driver";
private JDBCAdapter data = new JDBCAdapter(server, driver, userName, password);
//variables
private String user, pwd;
private Vector<Vector<String>> userTable = new Vector<Vector<String>>();
private Vector<String>colUserNames = new Vector<String>();
* Creates new form UserConnection
public UserConnection() {
initComponents();
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
private void initComponents() {
userLabel = new javax.swing.JLabel();
pwdLabel = new javax.swing.JLabel();
userTextField = new javax.swing.JTextField();
passwordField = new javax.swing.JPasswordField();
submitButton = new javax.swing.JButton();
statusLabel = new javax.swing.JLabel();
jScrollPane1 = new javax.swing.JScrollPane();
statusTextArea = new javax.swing.JTextArea();
changePwdButton = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
setTitle("User's Connection");
setBackground(new java.awt.Color(153, 204, 255));
setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));
setFont(new java.awt.Font("aakar", 1, 12));
userLabel.setText("User Name:");
pwdLabel.setText("Password:");
submitButton.setText("Submit");
submitButton.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
submitButtonMouseClicked(evt);
submitButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
submitButtonActionPerformed(evt);
submitButton.addKeyListener(new java.awt.event.KeyAdapter() {
public void keyTyped(java.awt.event.KeyEvent evt) {
submitButtonKeyTyped(evt);
statusLabel.setText("Status:");
statusTextArea.setColumns(20);
statusTextArea.setEditable(false);
statusTextArea.setLineWrap(true);
statusTextArea.setRows(3);
statusTextArea.setText("Initial assigned password is \"dime\".");
statusTextArea.setWrapStyleWord(true);
jScrollPane1.setViewportView(statusTextArea);
changePwdButton.setText("Change password");
changePwdButton.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
changePwdButtonActionPerformed(evt);
org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(userLabel)
.add(pwdLabel)
.add(statusLabel))
.add(35, 35, 35)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.add(submitButton)
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(changePwdButton))
.add(passwordField, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 230, Short.MAX_VALUE)
.add(userTextField, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 230, Short.MAX_VALUE)
.add(org.jdesktop.layout.GroupLayout.TRAILING, jScrollPane1, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 230, Short.MAX_VALUE))
.addContainerGap())
layout.setVerticalGroup(
layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(layout.createSequentialGroup()
.addContainerGap()
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(userLabel)
.add(userTextField, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(pwdLabel)
.add(passwordField, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
.add(statusLabel)
.add(jScrollPane1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
.add(15, 15, 15)
.add(layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
.add(submitButton)
.add(changePwdButton))
.addContainerGap(27, Short.MAX_VALUE))
pack();
}// </editor-fold>
private void submitButtonKeyTyped(java.awt.event.KeyEvent evt) {
if(evt.getKeyCode() == KeyEvent.VK_ENTER) {
submitButton.doClick();
submitButton.requestFocus();
changePwdButton.requestFocus();
private void changePwdButtonActionPerformed(java.awt.event.ActionEvent evt) {
String command = evt.getActionCommand();
if(command.equals("Change password")) {
passwordField.setText("");
//Get connection to the changing password panel
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new ChangePassword().setVisible(true);
private void submitButtonActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String command = evt.getActionCommand();
if(command.equals("Submit")) {
user = getUser();
pwd = getPwd();
data = new JDBCAdapter(server, driver, userName, password);
data.executeQuery("SELECT * FROM USERTABLE");
colUserNames = data.getColumnNames();
userTable = data.getDataTable();
if(colUserNames.elementAt(0).equals("")) {
statusTextArea.setText("Can not connect to database");
boolean checkUser = false;
int i = 0;
while(!checkUser && i<userTable.size()) {
if(user.equalsIgnoreCase((String) userTable.elementAt(i).elementAt(0))) {
//Find the user in database
checkUser = true;
//Check user's password
if(pwd.equals((String)userTable.elementAt(i).elementAt(1))) {
//Check for initial default password. The user is requested
//to change his password
if(pwd.equals((String) "dime")) {
statusTextArea.setText("You are requested to change your " +
"initial assigned password. Click 'Change password' please.");
else {
//Set UserConnection Panel to invisible
setVisible(false);
dispose();
//Get connection to the table
if(userTable.elementAt(i).elementAt(2).equals("0")) {
//Get connection to non-editable table
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
PVRackReportNonEdit rackReport = new PVRackReportNonEdit();
rackReport.createAndShowDialog();
else {
if(userTable.elementAt(i).elementAt(2).equals("1")) {
//Get connection to editable table
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
PVRackReport rackReport = new PVRackReport(user);
rackReport.createAndShowDialog();
//PVRackReport rackReport = new PVRackReport();
else statusTextArea.setText("You do not get approval for viewing data. " +
"Please contact the administrator for details.");
else {
passwordField.setText("");
statusTextArea.setText("Please enter corrected password or" +
"the administrator for details.");
i++;
if(!checkUser) {
passwordField.setText("");
statusTextArea.setText("Not find such user's name." +
"contact the admistrator for details.");
private void submitButtonMouseClicked(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
* @param args the command line arguments
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new UserConnection().setVisible(true);
public String getUser() {
return userTextField.getText();
public String getPwd() {
return passwordField.getText();
// Variables declaration - do not modify
private javax.swing.JButton changePwdButton;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JPasswordField passwordField;
private javax.swing.JLabel pwdLabel;
private javax.swing.JLabel statusLabel;
private javax.swing.JTextArea statusTextArea;
private javax.swing.JButton submitButton;
private javax.swing.JLabel userLabel;
private javax.swing.JTextField userTextField;
// End of variables declaration
Here is my JDBCAdapter
package rackdemo2;
* This is an adaptor which transforms the JDBC interface
* to the PVRackTableDialogue
import java.util.Vector;
import java.sql.*;
import javax.swing.table.AbstractTableModel;
import javax.swing.event.TableModelEvent;
public class JDBCAdapter {
Connection connection;
Statement statement;
ResultSet resultSet;
Vector<String> columnNames = new Vector<String>();
Vector<Vector<String>> rows = new Vector<Vector<String>>();
ResultSetMetaData metaData;
public JDBCAdapter(String url, String driverName,
String user, String passwd) {
try {
Class.forName(driverName);
connection = DriverManager.getConnection(url, user, passwd);
statement = connection.createStatement();
catch (ClassNotFoundException ex) {
System.err.println("Cannot find the database driver classes.");
System.err.println(ex);
catch (SQLException ex) {
System.err.println("Cannot connect to this database.");
System.err.println(ex);
public void executeQuery(String query) {
if (connection == null || statement == null) {
System.err.println("There is no database to execute the query.");
return;
try {
resultSet = statement.executeQuery(query);
metaData = resultSet.getMetaData();
int numberOfColumns = metaData.getColumnCount();
// Get the column names and cache them.
// Then we can close the connection.
for(int column = 0; column < numberOfColumns; column++) {
columnNames.addElement(metaData.getColumnLabel(column+1));
// Get all rows.
while (resultSet.next()) {
Vector<String> newRow = new Vector<String>();
for (int i = 1; i <= columnNames.size(); i++) {
String tempString = resultSet.getString(i);
if(!tempString.equals("null")) {
newRow.addElement(tempString);
else {
newRow.addElement("");
rows.addElement(newRow);
//Modify dataTable to add empty row to separate chassis
if(numberOfColumns>1) {
int nRow = rows.size();
Vector<String> row = new Vector<String>();
for(int i=0; i<numberOfColumns; i++){
row.add("");
if(nRow>0 || numberOfColumns>0) {
//Adding blank row to separate chassis
int i = 0;
while(i<nRow) {
if(!rows.elementAt(i).elementAt(0).equals("")) {
if(i>0) {
rows.add(i, row);
i++;
nRow = rows.size();
i++;
close();
catch (SQLException ex) {
System.err.println(ex);
public void close() throws SQLException {
resultSet.close();
statement.close();
connection.close();
// MetaData
public Vector<String> getColumnNames() {
return columnNames;
public Vector<Vector<String>> getDataTable() {
return rows;
public int getColumnCount() {
return columnNames.size();
// Data methods
public int getRowCount() {
return rows.size();
}

Thank you for your answer.
I'm very new to mySql as server. When I was assigned
to write the application, the administrator has set
up mySql database in the company web server for my
application. My program runs very when using my
workplace desktop with java web start or with java
web start in netbeans (all paths should be link to my
desktop hard disk, i.e. users/application/). I can
not run the application at home because I can not
access to the company intranet server (for security
purpose). The problem happens when I post the
application in the company web page (I have to modify
all paths in jnlp file to the company web address).
The program then runs without exception except it
seems that it gets no data from the database (for
example, when I type my username, it returns that
"There is no such user name. contact.." as what I
code in the application for not correcting user name)
It happens for not only using my company desktop but
also for others.
Please help me.
Thank you in advance.And all this could have been answered yesterday, in your other thread, when I asked you "Is the DB configured to allow that user to connect to the DB from where that user is attempting to connect from?"
Seeing as how you get that error, the obvious answer was, "No." At which point we could have continued.
Configure the needed users into the DB, without forgetting to allow them access from the machines from which they are going to access from.
Although, I agree with Rene, that you should set up a server of some sort, located on the same machine as the DB, for communicating with the DB.

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    protected void quit() {
        System.exit(0);
    public static void main(String[] args) {
        //Make sure we have nice window decorations.
        JFrame.setDefaultLookAndFeelDecorated(true);
        //Create and set up the window.
        InternalFrameDemo frame = new InternalFrameDemo();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //Display the window.
        frame.setVisible(true);
class MyInternalFrame extends JInternalFrame {
    static int openFrameCount = 0;
    static final int xOffset = 30, yOffset = 30;
    public MyInternalFrame() {
        super("Document #" + (++openFrameCount),
              true, //resizable
              true, //closable
              true, //maximizable
              true);//iconifiable
        //...Create the GUI and put it in the window...
        //...Then set the window size or call pack...
        setSize(300,300);
        //Set the window's location.
        setLocation(xOffset*openFrameCount, yOffset*openFrameCount);
}I want to take the input from the "memAddrBox" and put it into the "frame" using the update() method. Probably a simple solution, but I have not found a similar problem in the Forums.

I knew it had to be something simple, here is the fix I found:
import javax.swing.JInternalFrame;
import javax.swing.JDesktopPane;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JMenuBar;
import javax.swing.JFrame;
import javax.swing.KeyStroke;
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;
* InternalFrameDemo.java is a 1.4 application that requires:
*   MyInternalFrame.java
public class InternalFrameDemo extends JFrame
                               implements ActionListener {
    JDesktopPane desktop;
    JTextField memAddrBox;
    JTextArea menuText;
    JTextArea frame;
    String textFieldString = " Input Text: ";
    ActionListener al;
    public InternalFrameDemo() {
        super("InternalFrameDemo");
        //Make the big window be indented 50 pixels from each edge
        //of the screen.
        int inset = 50;
        Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
        setBounds(inset, inset,
                  screenSize.width - inset*2,
                  screenSize.height - inset*2);
        //Set up the GUI.
        desktop = new JDesktopPane(); //a specialized layered pane
        frame = createFrame(); //create first "window"
        setContentPane(desktop);
        setJMenuBar(createMenuBar());
        //Make dragging a little faster but perhaps uglier.
        desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
    protected JMenuBar createMenuBar() {
        JMenuBar menuBar = new JMenuBar();
        JLabel memAddrLabel = new JLabel(textFieldString);
        memAddrLabel.setLabelFor(memAddrBox);
        menuBar.add(memAddrLabel);
        JTextField memAddrBox = new JTextField();
        memAddrBox.addActionListener(this);
        memAddrBox.setActionCommand("chMemAddr");
        menuBar.add(memAddrBox);
        return menuBar;
    //React to menu selections.
    public void actionPerformed(ActionEvent e) {
        if ("chMemAddr".equals(e.getActionCommand()))
           JTextField textField =
             (JTextField)e.getSource();
            String memStartString = textField.getText();
            update(memStartString);
    public void update(String temp)
        frame.setText(temp);
    //Create a new internal frame.
    protected JTextArea createFrame() {
        JInternalFrame frame = new JInternalFrame("Memory",true,true,true,true);
        frame.setSize(650, 500);
        frame.setVisible(true);
        frame.setLocation(200, 0);
        desktop.add(frame);
        JTextArea textArea = new JTextArea();
        frame.getContentPane().add("Center", textArea);
        textArea.setFont(new Font("SansSerif", Font.PLAIN, 12));
        textArea.setVisible(true);
        textArea.setText("Initial Text");
        return textArea;
    //Quit the application.
    protected void quit() {
        System.exit(0);
    public static void main(String[] args) {
        //Make sure we have nice window decorations.
        JFrame.setDefaultLookAndFeelDecorated(true);
        //Create and set up the window.
        InternalFrameDemo frame = new InternalFrameDemo();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        //Display the window.
        frame.setVisible(true);
class MyInternalFrame extends JInternalFrame {
    static int openFrameCount = 0;
    static final int xOffset = 30, yOffset = 30;
    public MyInternalFrame() {
        super("Document #" + (++openFrameCount),
              true, //resizable
              true, //closable
              true, //maximizable
              true);//iconifiable
        //...Create the GUI and put it in the window...
        //...Then set the window size or call pack...
        setSize(300,300);
        //Set the window's location.
        setLocation(xOffset*openFrameCount, yOffset*openFrameCount);
}Note the e.getSource() change in the ActionListener.

When I place Ps and Ai files into Id it gets pixelated. How do I fix this?

I'm making some brochures for a church and I created the text and designs in Ai. When I go to place the Ai file in Id the text and images appear all pixelated! I have tried to do the same thing with Ps files and the text gets pixelated their too. Am I doing something wrong? I have heard that saving the files as a PDF and then using that PDF should help the problem but that has not worked for me either.
I'm using Adobe CC for all the programs and I'm running Windows 7.

Sorry for the incredibly late response. We hit the busy season and just have not had to cope with the print results.
Equipment:
Canon C5030 Buisness printer.
Win 7 64 bit
Adobe CC (all programs are updated to newest CC versions)
In InDesign Display Performance is set to High Quality Display
If I am working on and 11in X 17in Indesign document and I bring in some custom logos from Photoshop (the Ps file is 11in X 17in 300ppi)
no scaling or anything size changes are done it is a simple drag and drop onto the document..
The Ps file looks rough around the edges and when printed it is "fuzzy" around the edges of the Ps Image. all text created in Indesign looks crisp and perfect.

Read pixel from text file

Hi, is it possible to retrieve an image just by reading some parameters or its pixel from a text file? If yes, could anyone give me some ideas on how to do that? How do you also retrieve a specific line or value from a text file?
Thanks.

Hi Fred,
it seems you started a new thread for that very same topic - again...
Why can't you keep things in one place? Why do we have to hop between several threads of yours to get all relevant information?
"if I want to read line 13 of my text file"
Same question as in the other thread: Where do you start to count? 0 or 1?
Have you tried to wire a "13" to the ReadLine function?
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

How to get pixel colour?

Is there any way to get pixel colour from specified point? Example: colour = image.getPixel(x, y);
J2ME/MIDP 1.0
Thanks!

{color:#800000}*I am happy to compare the two pixels of same image using this code in Java:*
{color}
Image ori, nw;
public void init()
{ ori = getImage(getDocumentBase(),"flower.jpg");
int pxl[]= new int [65536];
PixelGrabber pg = new PixelGrabber(ori,0,0,256,256,pxl,0,256);
// Image is stored into Array
try{ pg.grabPixels(); }
catch(InterruptedException e) {}
for(int i=0;i<65536;i++)
{ int p = pxl[i];
int ri = (0xff & (p>>16));
int gi = (0xff & (p>>8));
int bi = (0xff & p); // Take the RGB value of each pixel
for(int j=0;j<255;j++) // Chk. other similar pixel in color range of 0 to 255
int q = pxl[j];
int rj = (0xff & (q>>16));
int gj = (0xff & (q>>8));
int bj = (0xff & q);
if ( (ri==rj)&&(gi==gj)&&(bi==bj)&&(!(i==j)))
{ ri+=70;//if (ri<0) ri = 0;
gi+=70;//if (gi<0) gi = 0;
bi+=70;//if (bi<0) bi = 0;
pxl[i] = ( 0xff000000|ri<<16|gi<<8|bi); // Change value
else
pxl[i] = ( 0xff000000|ri<<16|gi<<8|bi);// Keep as it is
Email : [email protected], Profile: www.aribas.edu.in/Mr.Brijesh_Jajal.htm

Lightroom not fix hot pixels from my Nikon D7100

Hi there.
I have a problem with my cam D7100: there are tons of hot/dead pixels on the sensor.
I am going to bring this cam to the service center.
But I have a lot of images captured with this cam, and need to remove hot pixels from them.
One my friend say about auto-removing in Lightroom.
So I try Lightroom 4.4, 5.0, 5.2. No one can remove hot pixels.
(sample images are here:
http://www.ex.ua/get/327247286713/74274705
http://www.ex.ua/get/327247286713/74274765
http://www.ex.ua/get/327247286713/74274845
http://www.ex.ua/get/327247286713/74274919
iso 100-200-400-800, shutter 1/250)
Is this operation going automatically, or I need to chose some tools or options in Lightroom?
Please, help me somebody, cause thouthands of images are flaking!!!
Thanks a lot!

Nikon-User-D7100 wrote:
I understand, that I have camera's sensor issue, but I can't understand why Lightroom not "repair" that images?
LR actually does more than find and repair 100% level "stuck pixels," it also finds and corrects low-level hot pixels and higher-level "random" hot pixels. The problem is that you have "many" higher level hot pixels and LR's processing algorithm thinks they're image data. A different raw processor may work better or worse. Feel free to "trial" any of them and report back here what you find. Even with my 600D set +2EV higher in exposure (ISO 100, 1/30 sec. versus ISO 200, 1/250) your noise levels are much higher. IMHO you've got a defective camera!
(Click on image to see full-size)
Nikon D7100 ISO 200, 1/250 sec. Canon 600D ISO 100, 1/30 sec.

Read Pixels From Application

Hi. I'm working on a project for fun in which I need the values associated with pixels at certain locations on a window of an application, which may or may not be changing.
I've been looking around, but have only been able to find support for reading in pixels from a saved image. One bad way to do it would be to write a script that takes a screen shot and accesses the pixel from the saved image. However, I was hoping for a more direct way to do this because I will want to run this script many times and at a very rapid rate (the higher frequency, the better). The way I suggested would waste both processing time and memory. Is there a way to just have a script pull off the pixel value corresponding to an (x,y) coordinate relative to the entire screen?
Any other suggestions?
Thanks,
Steve

Hi Steve--
This thread is a mess, because of all the formatting problems I was having -- not to mention that I somehow got the wrong idea of what you were after. Perhaps you could post your question again as a new thread, with whatever clarification you feel might help?
In the meantime, I've been trying to figure out exactly what you're up to and my guess is that it might be (probably is?) dynamic image editing for various animation effects. I can see that the code I posted might be useful for size animation, so I tried this with an open Preview window
(hope there are no formatting issues here):
set TargetWinName to "MyPicture.jpg"
-- you must enter the name of your window, or get script to enter it
set Wins_ to windows of application "Preview" -- you must enter relevant application
repeat with w_ from 1 to count items of Wins_
set WinName to name of item w_ of Wins_
if WinName contains " — " then set WinName to do shell script "echo " & quoted form of WinName & " | sed -e 's/(same note as before)*$//' -e 's/ — //'"
if WinName is TargetWinName then
repeat 100 times
set WinBounds to bounds of item w_ of Wins_
set bounds of item w_ of Wins_ to {item 1 of WinBounds, item 2 of WinBounds, (0.95 * (item 3 of WinBounds)), (0.95 * (item 4 of WinBounds))}
end repeat
exit repeat
end if
end repeat
For me, this essentially makes the image vanish into its upper left corner, but there are all kinds of things you might do. I'm a bit surprised that it works as well as it does, as Preview has limited scriptability.
I'm assuming (but may be wrong) that you want to do something like this with pixel color -- I don't know how to do that offhand, but I'm thinking about it. New post?
Message was edited by: osimp

Getting pixels from jtextarea

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