What is the difference between a JList and a JCombobox?

Hi I am trying to save an image(as jpeg) after I draw a rectangle on a JLabel which displays an image using Image Icon. I am completely lost as to how to do it...all i get is black imagehere is what i tried in my action performed if (source == nextButton) {//snip -writing to an imagetry ...

Can someone please help me. I am creating a JTable with AbstractTableModel and the table is populated from the database. As I understood it, I can only create an Object[][] of fixed size to store the data. My problem is that the number of rows returned from the database is unknown. How can I ...

Whats is the easiest(or best) way to query data from a DataBase and display it in a JTable, I have to implement a Tabel Model? How to do it?Thanks

i have a jframe and inside there are 2 jpanels and one of them has inside of it another one. i want the last jpanel (this that is inside the other) to display an image that i choose from a filechooser.i have done it upto the display where i can not add an image inside the jpanel.file is an ...

Hi,I need help!!My application should open html file that located in my computerit should be open when some line in JList was choosenmy question is: How can I open html file from my applicationI work with window XPI tried this one : Runtime.getRuntime().exec(cmdLine);but it doesn't workthe ...

Hi,I am developing a java based game that is vary similar to chess. It is event driven in terms of the input from the user to select their move.However, when it gets to the computer's turn, rather than just calling a method to calculate it, a new thread is started to work out the computer's ...

HelloI'm trying to display a html help file containing Russian text, with cyrillic characters. The html file is saved with Unicode (UTF-16LE). The swing component (JEditor) doesn't seem to be able to read the characters right. I tried to encode all Russian characters in the html file ...

On a jpanel i put scrollpanel and then jtable, working in jbuilder. now i want to update the jtable from the database by sending a query to database on clicking a button. the query response may contain 2 or more columns. Kindly any one can tell me what should i do. can any one send code example ...

Hi, I found that the layout manager is not enough for me to put things around, there's only some straight position like east, south, southeast, etc. Is there anyway I can put the component in a particular point? Thx.Adrian

Hi, If I want to use GridBagLayout, how can I leave an empty row? Or empty column? When I create the buttons on a frame, are they created sequentially? so Is that mean I can't put something back to the first row later in the program? Thx.Adrian

HelloI want to write a java pp with a fairly extensive GUI (swing), and I want to do it right.I am looking for a book that covers how to organize all the GUI components into classes, and orginazation of dialog boxes, action and event handling and such.Anyone know a good book for ...

Hi evry one, is there any one who can give me links to get a java look implementation other than metal, motif, gtk, windows, mac. Thank you.

I use a JEditorPane to display contents of a text file.The file gets updated by other tasks without any call to Document API butwith direct writes.There's a direct way to get the pane uptodate with file changes in a synchronous way?I could check file date after certain time intervals and ...

Hello,I am trying to add multiple components to a JOption Pane. When the JOptionPane is displayed, the JOptionPane is not resized in order to display all of the components. In my case, the buttons of the JOptioPane are pushed down. Only the upper half of buttons are visible.How do you set the ...

Hi to everybody,Supposing 3 JTables, with these column names (headers):JTable1:Column1: NAME_AColumn2: NAME_BColumn3: NAME_CJTable2:Column1: NAME_AColumn2: NAME_DColumn3: NAME_EJTable3:Column1: NAME_BColumn2: NAME_FColumn3: NAME_GWhat I want to do is to apply a renderer to the tables deppending ...

hi all,i need a trick to avoid the flicker in my Panel when i update the information of their labels. somebody tell me something about double buffering, what's that?thanks

Hi All...Got a bit of a problem with Internet Explorer and JDialog.I have an applet with a modal dialog (JDialog). Problem is: if I switch to another app running on my PC and then back to the my applet running in IE, it appears frozen as the dialog is still open but hidden behing all other ...

I want to add panel at runtime in center of content pane when i press label which is in another west side panel.Reply fastthanx

Hi,I use a JDialog to get an objet's name. So i redefine the content in witch I add some button.The title of this window is larger the new content. And when i show this window, the size is calculated on the size of the content so i can see the complete title.Is someone who can help me ...

Hi,I need some help working with teh background of a JCombobox. We develop in java 1.2.2. here we set the background of some comboboxes to red using setBackground on the Combobox. This works fine the selected item in the combobox will be red.Next if we run the code in java 1.3.1 (Server ...

I have implemented a Jtable with the ListSelectionModel. I use getMinSelectionIndex and getMaxSelectionIndex to tell which row has been selected. It has one small problem. If the row has already been selected and the same row is selected again the Listener will not trigger. I need to know if a ...

Dear All,Could someone please shed some light on the following.I set a component's Opaque variable to false and then it is serialized into a file for storage. When reloaded from the file, the opaque variable has been reset to true?Does anyone have any ideas?Many thanks in ...

If my View is simply presentation; my Model is "pure" data; and my Controller is behavior, in which class do I put any TableModels, TreeModels, etc? Derek

Morning all!!This is probably a stupid question but I have a program I wrote that runs a piece of semiconductor tester equipment. In the program there is a loop which sets the voltage/timing parameters then runs a test to determine pass or fail.The screen only updates when the loop completes ...

Hi,I have a JTable and want to have an special Header in the following way:--Title for column 1,2 y 3 --|--Title column 4 y 5-|--colum1--colum2-colum3|-column4-column5|cell1 - ...I want to put the table in a JScrollPane so the whole header is adjusting to the cells of the tableAny ...

Hi,I need some urgent help regarding setting the background of the list to whiteand displaying the string in black in my cell renderer.The background is blue,the selected index is red,which I dont want.I want the entire background white,the list elements displayed in black,and theselected list ...

In today's episode of I can't believe I can't find it in a forum...I want to create platform-independent icons (ImageIcons). I'd love it if Java could render disabled ('dimmed') versions of those icons for me, but it's not essential. I know I can draw them with code, but in a lot of ...

I need to paint a JTextArea directly to the JPanel like so:JTextArea t = new JTextArea();t.paint(g);But when I do so I cannot edit the JTextArea. Are there methods I can invoke which allow the JTextArea to become editable?

Hi,I wonder if it is possible and if, how you do, to tile a background image in a JApplet.Here is one answer I got previously:import java.awt.*;import javax.swing.*;public class TestApplet extends JApplet { public void init() { setContentPane(new MyContent()); this.getContentPane().add(new ...

Hey. This might be something that shows up on here alot but, does anyone know how to set the background of a JFrame or JPanel to a .gif file? I am struggling big time on this problem. It's a simple program that I'm working on that deals 2 hands of blackjack in a JPanel, and I'm trying to set ...

public class aPanel extends JPanel {//...protected void PaintComponent(Graphics g) {System.out.println("repainted");}}if I have a custom JPanel that looks like this, i can't seem to repaint it:ie:aPanel p = new aPanel();p.repaint();nothing happenshelp.. ...

HiNot sure if this is the best place to ask this. I've searched without finding much.Basically I am trying to create a HTML template system for output. User's can change the templates to change the program output.The templates are basic HTML with custom tags inserted, that reside in a ...

Hi allIt seems to me that the convenience method MouseEvent.getButton() always return 0 when called from within a MouseMotionListener's mouseDragged() method. Can anyone please enlighten me as to the reasons why?ThanksHannespublic class MyMouseListener implements MouseListener, ...

hi, i am a newbie here, just wantto ask a simple question. How to hightlight or set a color of a particular word in a textarea which consist of text.

Hi everybody,I need an application window which should not have title bar, but in menu bar right corner we should have minimize/resize/close buttons. application window should resize and move from the menu bar location. Also the side corners of the window should not be a rectangle, it should ...

After reading a lot of posts and samples the main question stays already:IS THERE NO WAY TO SAVE IMAGES FROM THE RTFEDITORKIT?I really really need this function!!Please Help

Hello!I am writing an application in that on clicking on the Button another window will open. In that frame 4 buttons must b visible. I was not able to see untill i am pressing twice on the button. Can any one tell the reason for that problem.Thanks for any help.Rajani ...

If I want the same label on 4 panels,is it a good idea to just create onelabel and add it to all the panels?

Hi to everybody,I have this problem: when I update the tree sometimes it happens that the JTree component displays a very huge (400 pixel) white space between two rows. The content of the tree is correct but there is one row that is very tall: it's only one row but very tall!! To update the ...

I've got a JDialog object (with Windows look/feel). The top right of the dialog box has an 'x' to close out. Is there a way to get rid of the 'x' so the user doesn't have the option of closing the box?

Hello!,do you know how to change Vertical Bar colour in a JScrollPane?Thanks!

I got so bored of manually putting the components onto the Jframe that i decided to go the VB way ;)check out this http://omega.uta.edu/~mvn6491/gui.gifIf anyone of you want the source code. i would be ready to share it with the person who requests for the ...

hello!i have a big probem,...i have written a program which should run with no gui, but i'm still using the gui(if i start this in the console there is an exception, because i have written class myclass extends jframe...)how can i get very easy an nogui ...

Hello,I have a result set which needs to populate a jtable - i can get hte headings but the actaul content is not showing or else coming up with with 'ClassCastException'Any help is appreciated.Regards,Longieimport javax.swing.*;import javax.swing.plaf.TableHeaderUI;import java.awt.*;import ...

hi,Border Layout consists of five areas (north,south,center,west,east), i wantto know how to set or adjust the height of each area because when i create a textarea in the "south" area, seems that the height is too small..how to solve this?thanks

Hi! I'm having trouble with using JScrollPane and I would apreciate some help. I'm trying to do the following:I have an object that extends JPanel (TestPanel) and in this object I draw some Strings and some graphics. I'm trying to set this object as the viewPort for a JScrollPane in a JPanel ...

I need a scrollable non-editable text browser to display text that can be computed on the fly. The text is too big to fit in the virtual machine, but it has a knownnumber of lines, each line contains the same number of characters, and each line can be computed on the fly given the line number ...

Hi there,I am trying to print a JTable by having it implement the Printable interface. It works, but it works only because I use the string values from the renderers of the cells. This works fine if its just simple left alligned strings. But when you are using formatted text strings for ...

Hows it going, just want to save what i have on a white board to a file, just freehand lines.i store the co-ordinates in an object and place all the objects in a vector.should i just write the vector out to a file or is there another way of saving the whiteboard to a file?a way that microsoft ...