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I want to update a particular image on TextArea(swing) ,when I enter a particular Alphabet on my keyboard. How?

I am trying to print particular images(which include some drawn symbols) on textarea when I type a particular Alphabet on my keyboard. How?

You can't use a JTextArea since it can only display text.
You can use a JTextPane as it supports the display of Icons.
Check out: Auto Replace Smiles. It shows how to replace the two text characters :) with an Icon.

You are asking me to do your homework, but still. I will give you only the pseudo code, you will have to write it on your own.
Write a JFrame.
Add a JLabel to the JFrame (using a label is easier than using a text pane, and it is impossible to use a text area).
Add a Key Listener to either the JFrame or the JLabel depending on your application.
In the handler write code to add a ImageIcon to the JLabel when the key you want is pressed or whatever.
Cheers!

JFrame 'Console' style text

I have probably a quick question but here it goes. I am making a game (new to programming) and I want a text field in the middle of my game that I can easily add to kind of like a console. You will be able to view the beginning from late into the game.
Example:
Welcome to the game.
Added when you click a button
More text is added.
You click a different button
More text is added.
I am currently using a JLabel for this but it's a .setText which is inconvenient when I want to have tons of text throughout my game. As well, how could I add a scrollbar to this?

I'd guess you are looking for JTextArea .

Trying to recreate Skype conversation panel with Swing

I am trying to recreate the Skype handles instant messaging using Swing components. I am using JList with a custom ListCellRenderer to render each cell in the list. The ListCellRenderer extends a JPanel, the JPanel simply contains a label (where I will put the username) and a JTextArea which is where the users' messages will go. The JTextArea is what Im having problems with.
Here's an image of what I have a the moment -
Ive removed the scrollpane that automatically comes with the textarea in netbeans.
I am showing the Navigator, the Design view and the actual program (the list has two elements) in this image.
The the text in textarea is actually much longer than in this image but it is not word wrapping. I have set lineWrap and wrapStyleWord to true in the properties box for this textarea but it doesn't seem to take any effect. I then tried to set maximum size using the properties box and that doesn't have any effect either.
Is there any way to control the padding/margins around components with netbeans gui designer. The automatic placement it gives me for spacing between components is either several pixels too small or two large. I need exact placement on the list's cell components.
For reference here is how skype's convesation panel looks (ive added in the red "Brian cs"'s as thats how I will be doing it in my program). As you can see the sentences wrap and there is an appropriate amount of space between cells. So anyone know how to achieve this using Swing?

The JTextarea is not the problem. The JList sets the heigth for each row. See JList.setFixedCellHeigth or setPrototypeCellValue

how to make java run time sizable image box

I'm making a Unicode translator in Java. I did all hard parts, but now I want to add a resizable, relocatable image to the textpane. The user must be able to resize image with its corners and drag & drop the image within the textpane where he likes. (like Microsoft Word or Photoshop)
Something like this:
I tried the Styled Document properties. But I couldn't find way except inserting only an ImageIcon.

May be a better choice would be not to use textPane.
If you have an custom editable label, that can be edited by double clicking on it to show a text box to edit the contents, and change the text of the label when enter key is pressed.
Also give a shot of JDesktoppane, JLayeredPane, and check what components can be added to it.

try this
http://mgeisler.net/downloads/browser/src/ImageBox.java.html

try loading the image inside a JLabel component in JFC Swing.
Otherwise try some other non editable components in the same technology with resizable property.

try this http://sourceforge.net/projects/ird/
the iRD is a component for Resize and move(drag&drop) compoennts on runtime in java.

on click add dynamic text area -like object in Java

The title is a bit confusing, but I will be using Java and Jframe. Basically, I want to be able to click anywhere on the form and have a "text area/box" show up (maybe use a JTextField or JTextArea ?). I want the user to be able to edit, delete and move this string around as well.
I am thinking I need an actionlistener to listen for clicks on the form. Each click will call for a new text"box" to be created. I am not sure how to make this "box" editable, deleteable, or moveable by the user though.
I need a way to store the string and co-ordinate data too. Would it be a good idea to simply extend the JTextField or JTextArea to add co-ordinate information to them? I see that swing is event based, so I need some kind of trigger to "save" the text (was thinking the enter key, but I realize I'd like the user to be able to enter multi-line strings).
Any thoughts would be appreciated. I am familiar with Java but only have a bit of experience with the UI portion.

Instead of an ActionListener you will need a MouseListener to track clicks.
Sounds like you need an undecorated JInternalFrame with a text box in it on JDesktopPane. However, I don't think you can create an undecorated JInternalFrame, maybe start with a normal JInternalFrame with a TextBox in it and create new frames on mouse clicks on the Desktop Pane. Then see if you can make the JInternalFrame more like a Window.
Another route is a custom component that does everything you need. This is possible, just a lot more custom code.