hide/show a Composite

I want to hide/show a Composite (an SWT widget) based on some checkbox selection. When hidden, I want the Composite to be completely hidden (occupying no space at all). How can I do this? <composite>.setVisible (false) makes it invisible but the space occupied by the widget still remains and looks like a void in the application.

Class Literal ???

Just reading through the java documentation - been a long time coming really, lol. However I came across this 'Class Literal' idea and not sure if I understand it. The documentation says: "Finally, there's also a special kind of literal called a class literal, formed by taking a type name and appending ".class"; for example, String.class. This refers to the object (of type Class) that represents the type itself. " http://java.sun.com/docs/books/tutorial/java/nutsandbolts/datatypes.html If I say: String stringOne = "abc"; String stringTwo = a + ".class"; //Apply this to the string

java to exe

I was wondering, does anyone know of a free java to exe compiler, been looking all over including in usenet and have had absolutely no luck. I tried gcj and it simple deson't work no matter what I try to get it working and I don't think it will. Is someone using one or is there anyone hwo knows of a good one? -Robin

What does this error description mean?

While compiling a program in Java I got this big WARNING warning: [unchecked] unchecked call to LinkedList(java.util.Collection) as a member of the raw type java.util.LinkedList on this line: LinkedList<Integer> li2 = new LinkedList(li); What does this warning mean? Edit: It should have been infact: LinkedList li2 = new LinkedList(li); But still if you please answer the question.

Brackets in pattern matching

Hi, I'd be grateful if anyone could let me know how I can escape a single round bracket (unicode \u0028) when doing: Pattern.compile("(S "); Pattern.compile("(N "); etc. I cannot for the life of me figure out how to do this as if I try things like the unicode it simply treats it as though I were trying to enter a 'grouped' regular expression and throws an error. Regards

ArrayIndexOutOfBoundsException

Hi, With the following code I get an ArrayIndexOutOfBoundException, and I can't figer out why. (This is a really newby question, I know) <snip> class TestArray { public static int testarray(int w, int x) { int[][] matrix = new int [10][10]; for (int a = 0; a<10; a++) matrix[a][0] = w; for (int b = 0; b<10; b++) matrix [0][b] = x; return matrix[w][x] ; } } public class ArrayTest { public static void main(String args[]){ int k = 1; int l = 1; for (int j = 0;j<10; j++){ System.out.print(TestArray.testarray(k,0) + " "); System.out

ObjectInputStream: is this correct way to unblock

ObjectInputStream blocks when created until it recieves a serial input stream ans verifies it. I was trying to make my first program using sockets through it and found this. I used a dummy object so that it doesn't block. The code is here: http://pastebin.com/CYPAM5ET Is this the right way. Please comment.

Java me ui

I have an application written in java, however i want to export it to my cell. I cannot find any information about the UI of java ME on the Internet an no book descibes it help would be useful

uninstall jre error

The jre seems to be corrupted. Tried to uninstall, get an error that a dll is missing?? It will not uninstall or reinstall. Any suggestions??

Convert encodings

I am downloading a webpage using the HttpURLConnection, where I get the InputStream, but are there are any ways I can convert the webpage's charset to the client's charset I am getting the webpage's charset by using this: // Get the charset String charset = conn.getContentEncoding(); // Check if the charset is not known if (charset == null) { // Get the Content-Type String contentType = conn.getContentType(); // Get the charset charset = contentType.split("charset=")[1]; } But how do I convert it? I have an idea by using the constructor of InputStreamR

HTTPUrlConnection does not download the whole page

I have a problem with this code, as you can see in print, where it prints the error in the page's code: public void print(String link) { String page = this.getPage(link); // Here I can see the error as it prints the error in the page's code System.out.println(page); System.err.println("1234567890+"); } public String getPage(String link) { String pageEscaped = ""; try { URL url = new URL(link); // Open the Connection HttpURLConnection conn = (HttpURLConnection) url.openConnection()

error at LeadPipeInputStream.read(): Pipe broken

ANT signjar issued the error message: error at LeadPipeInputStream.read(): Pipe broken All seemed to work fine otherwise. I was curious what the message means. I thought it might be a joke or virus, but there is truly a LeadPipeInputStream as part of ANT. -- Roedy Green Canadian Mind Products http://mindprod.com Computers are useless. They can only give you answers. ~ Pablo Picasso (born: 1881-10-25 died: 1973-04-08 at age: 91)

Serializing a non-Serializable class...

Hi there, I have an application I interact with via a Java API. The application is outside of my control (subscribed service) and it does not have a sandbox and has a limit on the amount of data you can download per day. While in development stage, I would like to be able to serialize the returned message object, so my application can call the API once and I can debug my code without having to continually call the application and potentially reach my download limit (hitting this limit can have some serious consequences) Unfortunately the API object does not implement Serializab

Can Someone please help me with my Computer stuff? 73382

I use the computer and the Net on a regular basis but I don't know a whole lot about it all, especially when it gets technical. I have an Acer Aspire AM5100-U5300A. I would like to speed this computer up, I would like a very good grasphics card without spending a fortune. Once I find out what I need I willo just go to ebay but I don't know what kind of meory, cards and such are compaitble with my machine. Help please. Virgina ghtpl@yahoo.com http://ipods-imacs.com ZTYtZ(J.^$zWht,v#.@U++H@K

Help needed using dnd to move images

Hi All, I am using Windows XP and jdk1.6.0_16 I downloaded DragPictureDemo2.java, from Sun,. http://www.java2s.com/Code/Java/Swing-JFC/DragPictureDemo.htm When I do a dnd for each image, the image is snapped into a nearest, pre defined, location as in a grid. I want to dnd each exactly where I move the mouse (cursor) position and not have the grid feature. I have tried to make happen by removing the grid, but each image during loading is placed on top of the other and nothing moves using dnd. TIA bH

483831 Information portals for computer and Web technology 49

I fell in love with the net and all the compuiter teahcnology in the very early years and have loved it ever since, I have an IT Degree and Communications degree and will be working on my doctorate for the next five years, in bwetween I design websites, databases, Multimedia Produxction or anything that wil make me a penny, just student scraping by. But Guess what? I don't want your money, your e-mail, or anything. Each of these sites has a specific topic but they have them style and layout sothey are easy to navigate and ther a search function should take you to exactly where youwant to, o

in gcj, undefined reference to winmain@16

In gcj I am getting an undefined reference to winmain@16. How can I fix this problem. -robin

Java & XML

Can anyone help me how to handle JAVA NullPointerException? Is it possible to continue to run in "<>" as shown below? Or I need to assign a new value if String A is null? Please advice. Thanks. String AA = getXMLInfo(XXX, "YY"); String A = myDate.convert(AA, inDateFormat, outDateFormat); String BB = getXMLInfo(VVV, "UU"); String B = myDate.convert(BB, inDateFormat, outDateFormat); catch (NullPointerException e) { System.out.println("main: Oops, null exception caught"); <continue to run and assign A=B, C=D;> }

DefaultCellEditor.EditorDelegate

Hi, I am studying the JTable object model (in the early days I got all learning arrested until I found a suitable metaphor for a transistor), and just bumped into DefaultCellEditor.EditorDelegate nested class. The documentation is laconic regarding its usage. I just did some googling and found nothing but references to the Java documentations, copies of it, and a few examples -which may be useful, but there's a lot of weed filtering to do before finding anything useful. Can anybody point me to a good example or explanation of what it is useful for? Thanks in advance.

java to .exe

Are there any good java to .exe progrms available for free. I looked and found none. Thanks. -Robin

What is the name of this?

Hi, I am studying the chapter devoted to JTables in Sun's Tutorial. I found a construct like this: JTable ltable = new JTable(new MyTableModel()) { //Implement table cell tool tips. public String getToolTipText(MouseEvent e) { ... } ... } If I understand it, this is the declaration and immediate initialization of an instance a class derived from JTable, whose method getToolTipText is being overriden. I don't know if I like this in practice (I find it obfuscating and exactly the opposite

folder vs directory

Is there any difference between a folder and a directory? I notice Windows people using both the terms folder and directory, where formerly only Mac types talked of folders. I saw some JPSoft docs that suggested directories are actual directories on hard disk, and folders also include virtual directories (I forget what Linux folk call them.) It when you have a directory entry that points to files that live in some other directory. I have also heard the terms "symbolic link", and "junction". I would like to sort out the precise meanings of these words for the Java glossary. --

dot notation question

Here's a very basic question I've come accross a I'm trying to learn Java. Given the code: class TestLoop { String[] firstNames = {"Bugs","Nancy","Betty","Jimbo"}; String[] lastNames = new String[firstNames.length]; void printNames() { for (int i = 0; i < firstNames.length; i++) System.out.println(firstNames[i] + " " + lastNames[i]); // Question! } public static void main (String arguments[]){ NamesLoop a = new NamesLoop(); a.lastNames[0] = "Smith"; a.lastNames[1] = "Jones"; a.lastNames[2] = "Pepper"; a.lastNames[3] = "Keith"; a.pr

Receiver in Outputstream.read() stops after 2735 bytes

Hi, I have written a sender-receiver and the receiver stops receiving any data after 2735 bytes. The sender seems to be fine, because when connecting with a telnet session, it sends all the bytes. I have tried to send the data in 100 byte pieces and flush() afterwards, to no avail. Am I missing someting? TIA Bart -- Bart Blogt Beter: blog.friesoft.nl

I have Java Applet that is free for educational use, but I would like to license (currently free) for...

....commercial usage. I don't want to restrict with a node locked license, and I'm sure it wouldn't be particularly robust, but I'd like to simply restrict an applet to running on a given domain via a license key retrieved from the server. For example, I'd like to have a server at www.something.com and it contain a license key containing encrypted information that equates to www.something.com. Ignoring the issues with encrypting in an applet (or any bytecode compiled resource), can an applet figure out what domain it is being served from, or just the IP address it is served from