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Use setKeepWithNext in IText7.0.2

I need to keep more than one paragraph in the same area. See the image, I want title "Proposal Summary Report", solid line, and next paragraph in the same area. When I used the method setKeepWithNext, it just keep two paragraph in the same area. How can I do it?

You could check the remaining space available on the page, and compare that to the height of the elements you want to render. If there is not enough room to have all of these elements on the same page, insert a new page and then insert the elements.
The wonderful thing about this approach is that it becomes very modular. You can create a virtual element used solely for grouping elements together that imbues this logic. Then, whenever you want elements held together, use this container-element to ensure the logic.

Java Selenium - How to interact with id-less/class-less element?

I'm trying to interact with a button on a page. Linktext and xpath do not work, there are no classes or combinations of selecting elements and looping through them I can find that work.
Here is the screen shot of the code I'm trying to do a .click()
Please help me how do i achieve the same ?

I think you have 2 options as below. I simplified your example HTML code to smoke test these queries:
Select an element based on its content. The drawback is of course that as soon as "Historical Scans" label changes to something else your query will stop working.
//nav[#id='secondaryNav']//ul[contains(#class, "menu")]//a[normalize-space(.)="Historical Scans"]
(working example on xpath tester http://xpather.com/dqZ7UWvz)
Select an element based on the position on the list. The downside is that it will stop working once this element changes its position.
//nav[#id='secondaryNav']//ul[contains(#class, "menu")]/li[3]/a
(http://xpather.com/rgexHKBB)
Based on my experience you should not rely on any other attributes or elements. Ideally, the best option would be to add ids/classes. Please let us know if this solves your problem.

Best way to implement a selection box from a large number of entries

I have a large set of data from which the user has to select one. I'm thinking of a way to implement it (of course, in a GUI). I have a few ideas. But just thought of posting here as there may be better alternatives..
Say, user has to select a name from a large set of user base. If I simply put a text field for user to enter the name, then there can be issues like entering same name in different formats, misspelling etc...
I see two options here
Using a combo box
Using a list (Actually i'm thinking of something like a tool tip. As I cant show the whole list always due to space issues)
But combo box won't be much user friendly i guess. As the user will have to scroll around the whole list to select an entry. If the number of entries are too large, this will be
Which means, now I'm left only one option. A popping up list, which will change the content according the text user is entering in the text field. So he can type first few letters and the list will show all the entries starting from the entered text. Got my point, right?
Are there any other better to achieve this kind of need?
If I'm going to implement above, what will be the best way to follow. I'm thinking of extending the JTextField to add required functionality. Well, I'll put some method to set the popup list entries. And I'll add some actionListner to watch the text field, and control the popup list accordingly...

Autocomplete is what you are probably looking for. Google for "java swing jcombobox autocomplete" and limit results for the last couple of years to get relevant results. There will be a lot of examples and ideas on how to implement this with custom code.
I believe there is also some custom libraries like "swingx" that provide at least partial or full implementations to save time.
http://swingx.java.net/
They have released code as recently as the beginning of this years so it appears active and might have what you need.

You could take a look at SwingLab's autocomplete feature, it allows you to attach it to a JCombBox, JList or JTextComponent

use AutoComplete JComboBox/JTextField
based on Standard Java Classes
no issue with larger sets of data
no issue with Focus, BackSpace Key, Caret
for better performance to required sort the array before use
simple workaround for setStrict(true/false), restrict input to array

Make Label Displayed Inside a Vertex Box (jgraphx library)

I need my vertex label displayed entirely inside vertex bounds. I mean if my label is too long then part of it will be displayed outside the vertex box. Is there any way to automatically split label into multiple lines and make it fit the vertex bounds? This line breaks should be recalculated after vertex resize. Can i do it using styles? mxUtils.wordWrap() seems to be the way but i cannot figure out how to use it properly. Give me an example of using it please. Thanks for your answers

Another similar question: Calculate the display width of a string in Java
Abstract:
Graphics.getFontMetrics + FontMetrics.stringWidth
From this, I suppose you could create a List<String> and add the words of the text one at a time until you reach your max length, then add a new node to the list for the overflow. Finally, append each node in the List to each other with a line break in between.
On another note, from what research I did, it seems jGraphX runs on swing. Swing now supports HTML. Here's a link to further info: http://docs.oracle.com/javase/tutorial/uiswing/components/html.html.
I will see if I can get a quick test coded up, but that must wait until I get home.

Selecting nested subexpressions in a Swing GUI

As a part of a GUI design that I'm implementing in Java swing, I need the user to be able to select parts or subparts of a tree like structure represented as a string.
For example, if I were to display the following expression, ((a|b)|(c|d))
The user would need to be able to select any of the following
(a|b), (c|d) or the entire thing ((a|b)|(c|d)).
Ideally I'd like them to be able to navigate via the keyboard arrows, moving up and down though the nested subexpressions, and hit enter when they come to the subexpression they want. However if its only possible to do this on mouse click, thats also acceptable.
The main issue that I'm having with this is the nesting component. I could easily make the entire expression selectable, but I don't know how to allow subexpressions to be selectable using SWING components. Based on my research Swing doesn't allow nesting of labels of text areas in the manner that I need so I'm looking for any alternatives.
Any help or suggestions would be much appreciated.

You could use a Highlighter and a DocumentListener on the read-only JTextField suggested by Joop in the comment above, following http://docs.oracle.com/javase/tutorial/uiswing/components/textfield.html in the section about JTextFieldDemo. That way you can highlight your (partial) string and listen to what (sub)string is selected, and compare it to the original string to check for matches.