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Codename One - autoscroll the screen

In a Codename One GUI builder app when I navigate back to my Main form, the screen is always shown at the top.
How can I get the screen to auto scroll down to the part I want and retain its previous scroll?

I'm assuming that this is a GUI builder app.
Normally this should be seamless as the UI will scroll to the last focused component but if you don't have focusable elements this might be harder. You can store the scroll Y value on the exitForm event and restore it the beforeShow event using something like:
f.addShowListener((e) -> f.scrollY(yValue));

How to "Unclick" a JButton without releasing the left mouse button?

I have set up a mouse dragged listener. I trying to set it up where you can click one button then drag your mouse over others to click the other ones. The problem I am having is when you click the first button it turns grey like its waiting for you to release the mouse button. When you move your mouse off the button (still holding the left mouse button) it returns back to its normal color but you cant highlight anything until you let go. Is there anyway to simulated letting the mouse go and "unclicking" the button so you can highlight other things?

What you observe is the typical behavior of the ButtonModel used by Swing buttons. A complete example is examined here, but note how the effect depends on the chosen Look & Feel's ButtonUI delegate.
To get the effect you want, you would have to create buttons using your own variation of BasicButtonUI and a custom ButtonModel that uses isRollover() to add buttons to your program's notion of a selection model.
As an alternative, consider JList, which contains a ListSelectionModel that allows MULTIPLE_INTERVAL_SELECTION. A compete example is shown here.

Image Click event in Java LibGdx

I am working on a Street Fighter Game. I need to have a character selection screen for the user. How can I do this character selection in Java libGDX? This is my image code. Can I do this using ImageClick event?
splashTexture1 = new Texture(Gdx.files.internal("assets/gui/Character1.PNG"));
splashTexture1.setFilter(TextureFilter.Linear, TextureFilter.Linear);
splashSprite1 = new Sprite(splashTexture1);
splashSprite1.setX(100);
splashSprite1.setY(180);

My suggestiong is using scene2d for menu or HUD stuff.
Check this out : https://github.com/libgdx/libgdx/wiki/Scene2d
scene2d is a 2D scene graph for building applications and UIs using a hierarchy of actors:
buttons
labels
sliders
text buttons
scrollable views (lists)
tables
your custom widgets
group of actors
You can add ClickListener to an actor. (In your case the actor is a Button)

You can do it in two ways. I'd recommend using both.
Common stuff
You can list images of all characters in a screen. And let the user select any one using one of the following.
Click event
Each image will have a separate ClickListener (If you have problem regarding that, you should search 'How to add clicklisteners to libgdx actors).
On clicking any image, the variable storing selected character (for the rest of the game) will be set with the image that has been clicked. And the screen is changed.
Keyboard event
One of the image will have focus drawn around it. The user can move focus around to other character images using arrow keys. When user presses enter, the character that currently has focus gets selected and the screen is changed.
Hope this helps.

I would recomend to use the Table-Layout from libgdx for it. Add an ImageButton to a Table and add an ClickListener to the ImageButton. Add the same Texture as up and down Texture and you are done. Maybe change it later so the user see that he has clicked a figure.
The Table gives you the ability to arrange those Buttons in the way you like and it's structured. Moreover it is easy to create a dynamic view, that does have new ImageButton for every new Texture you add to a folder for example. Just create a ScrollPane with a the Table of "figures" (which are the ImageButton with an listener) and you can add a bunch of it and let the user scroll down and up to check which he likes.

Android Radio buttons do nothing on click

Is there a way to make radio buttons do nothing when they are clicked? I am trying to make a Score Board and need a way to show the periods/halves/quarters ect. The radio buttons will be selected by the program to display periods/halves/quarters ect. Is this a good way to do it or is there a better way?

Check out the clickable attribute for Views
Defines whether this view reacts to click events.
Must be a boolean value, either "true" or "false".
http://developer.android.com/reference/android/view/View.html#attr_android:clickable

If the user doesn't ever need to click the radio buttons (ie if its always controlled by the program), why don't you just use images instead of radio buttons.
The benefits of using images for this are...
Images aren't clickable by default
It'll look nicer (you can make the Images look like a real scoreboard)
It doesn't rely on the default Android appearance (which is different for each phone)

Add icon button beside tree item in eclipse tree

I wonder how to add an icon that acts as a button in the right side of a tree item
the selection of this icon should have different action than selecting the tree item itself.
How can I do that?
Example:
consider this is the main tree
http://www.eclipse.org/articles/Article-TreeViewer/images/main.gif
and I want to add icons to the right side of some tree items' label
like
http://store2.up-00.com/June12/8QI59630.gif
just as when I click on the black star icon, I make a different action than selecting the tree item

Such facility does not exist in the tree widget, but you can implement this yourself using a technique called owner-draw where you take over the painting of tree items. See OwnerDrawLabelProvider. To respond to clicks you will need to listen to mouse down even and check whether the coordinates match the bounds of your button before invoking your action.