Michael Dunn

> Michael Dunn,
> your approach works only in the FIRST time.Once you pressed jbutton, after i change the cell value(putting others to 40), the color change to blue without pressing JButton.

rubbish.

it's a JToggleButton, not a JButton and it's your code:
private class ColorButton extends JToggleButton

if you don't know the difference, read the docs to find out why a JToggleButton remains 'pressed'

apologies for butting in here, but this might be one way of doing what you want (from your description)
import javax.swing.*; import javax.swing.table.*; import java.awt.*; import java.awt.event.*; class JTableDemo extends JDialog implements Runnable { public static void main(String... arg) { SwingUtilities.invokeLater(new JTableDemo()); } boolean analyzed = false; JTable table; private JTableDemo() { JToolBar bar = new JToolBar(); bar.add(new ColorButton("None", null)); add(bar, BorderLayout.NORTH); Object[][] rowData = {{"10","30"},{"20","80"},{"30","70"}}; Object[] colID = {"Column 0","Column 1"}; table = new JTable(rowData,colID); table.setAutoCreateRowSorter(true); table.getColumnModel().getColumn(0).setCellRenderer((TableCellRenderer) new MyColorRenderer()); table.getColumnModel().getColumn(1).setCellRenderer((TableCellRenderer) new MyColorRenderer()); add(new JScrollPane(table), BorderLayout.CENTER); pack(); } private class ColorButton extends JToggleButton { private ColorButton(String text, Color color) { super(text); addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { analyzed = isSelected(); table.repaint(); } }); } } private class MyColorRenderer extends DefaultTableCellRenderer { @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected,boolean hasFocus, int row, int column){ JLabel label = (JLabel) super.getTableCellRendererComponent(table, value,isSelected, hasFocus, row, column); //int cell=(int)value;//I also don't have jdk 7 if(analyzed) { int cell=new Integer(table.getModel().getValueAt(row,1).toString()).intValue(); if(cell==40)label.setForeground(Color.BLUE); else label.setForeground(table.getForeground()); } else label.setForeground(table.getForeground()); return label; } } public void run() { setDefaultCloseOperation(DISPOSE_ON_CLOSE); setVisible(true); } }
run it, change (0,1) to 40 [enter], click the toggleButton for selection --> row should change to blue foreground,
then click again to unselect it --> row reverts to normal color.

(I've stripped everything unrelated to the specific problem)

a) in your class declarations you have this
JTextField tf1 = new JTextField(2);

b) in public void GUI_1() you have this
JTextField tf1=new JTextField();
...
pane.add(tf1);

the tf1 in (b) is the one you see on the screen
the tf1 in (a) is the one accessed by the listener (it is not on the screen, so nothing is entered into it)

either remove JTextField tf1=new JTextField() from (b), or change it to
tf1=new JTextField();

see how you go with that change

this is the end of what prints out when attempting to compile your mess:

98 errors
Press any key to continue...

so, how could you possibly get a NPE from the posted code?

I don't use Netbeans or JTattoo, but just a thought - have you tried setting the row height to (say) 35?
if it's still ignored, perhaps contacting JTattoo via their website might be worth a try.

go back to my demo code and run it again, replacing *all* occurrences of "Test.gif" with
"images\\c.jpg"
not
"images/c.jpg"

remember it's *all* occurrences

> Why not my code is smart or where i done mistake?

I've explained (in some detail) on numerous occasions that all you need to do
is to create a 'safe' rectangle (very similar to your friend's code) and then check
the position in mouseReleased *not* in mouseDragged i.e. when the dragging has
stopped.

Do you actually know how often mouseDragged fires during a drag?
Put in a System.out.println(..) and you'll find it's a significant number,
so mouseDragged will be continually going through those if/else's - all
for nothing.

To put it bluntly, you've butchered the dragger class.

another way is to use a Jpanel to paint the image as its background, then add components as normal

here's a very simple demo
(the BackgroundPanel class is from this forum's FAQ (main page))

import javax.swing.*; import java.awt.*; class Testing { public void buildGUI() { BackgroundPanel bp = new BackgroundPanel(); bp.setLayout(new GridBagLayout()); bp.add(new JButton("Can You See Me?"),new GridBagConstraints()); JFrame f = new JFrame("JFrame"); f.add(bp); f.setSize(400,300); f.setLocationRelativeTo(null); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setVisible(true); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable(){ public void run(){ new Testing().buildGUI(); } }); } } class BackgroundPanel extends JPanel { Image image; public BackgroundPanel() { try { image = javax.imageio.ImageIO.read(new java.net.URL(getClass().getResource("Test.gif"), "Test.gif")); } catch (Exception e) { /*handled in paintComponent()*/ } } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); if (image != null) g.drawImage(image, 0,0,this.getWidth(),this.getHeight(),this); } }

the textfield/label stuff has been discussed-to-death in most of your topics

https://coderanch.com/t/605700/java/java/user-input-JTextField-class-label

despite the advice (20 or 30 times?) to cretae a simplified version that fails,
all you seem you want to do is to get someone to fix your code.

there's a web-site for that: rent-a-coder, where you pay someone to do it.

more info/replies here

http://www.javaprogrammingforums.com/whats-wrong-my-code/24908-stop-applet-running.html

> Java told me that line 636, 123, and 120 were having NPE, so what should I do?

the code at the link only has about 30 lines, the last line having about 10,000 characters.

this smells trollish to me - just someone trying to have a bit of fun.

recommendation to mods - lock this, and any of his other topics if they start with go to my blog.

Swing is 'event' driven - all events are fired.

your program registers listeners for specific events it wants to be notified when happened (mouse/key/action/whatever).

here's a simple program to play around with.
click anywhere on the panel (there's no mouseListener 'added' to the panel).
import javax.swing.*; import java.awt.*; import java.awt.event.*; class Testing { Point pt = new Point(0,0); public void buildGUI() { final JPanel p = new JPanel(){ public void paintComponent(Graphics g){ super.paintComponent(g); g.drawString("Clicked here.",pt.x-8,pt.y-25); } }; JFrame f = new JFrame(); f.add(p); f.setSize(800,600); f.setLocationRelativeTo(null); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setVisible(true); Toolkit.getDefaultToolkit().addAWTEventListener( new AWTEventListener() { public void eventDispatched(AWTEvent e) { if(e.getID() == MouseEvent.MOUSE_PRESSED) { pt = ((MouseEvent)e).getPoint(); p.repaint(); } } },AWTEvent.MOUSE_EVENT_MASK); } public static void main(String[] args) { SwingUtilities.invokeLater(new Runnable(){ public void run(){ new Testing().buildGUI(); } }); } }

you need to set the frame visible
you'll also need a window listener to close the frame/program
and you also need to do a lot more add(..)ing

> 'm making a drawing applet....

you missed the opening'I' in your copy/paste

http://stackoverflow.com/questions/15160968/cant-figure-out-why-my-line-shape-wont-re-size