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  • Is there a Swing JPanel toolbar background that fits all OSs?

    - by Nazgulled
    I'm using a JPanel to have a toolbar on my background, but I don't like the look of it. Actually, there's basically no look, no background and the buttons are flat when the mouse is not over them. This is on Windows. How can I have a better look for this? Something that would fit better on Windows? Maybe something like the ToolStrip in Visual Studio? Or maybe something better that would look much better depending on the OS version (Windows, Mac, Linux)? Suggestions?

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  • any way to simplify this with a form of dynamic class instantiation?

    - by gnychis
    I have several child classes that extend a parent class, forced to have a uniform constructor. I have a queue which keeps a list of these classes, which must extend MergeHeuristic. The code that I currently have looks like the following: Class<? extends MergeHeuristic> heuristicRequest = _heuristicQueue.pop(); MergeHeuristic heuristic = null; if(heuristicRequest == AdjacentMACs.class) heuristic = new AdjacentMACs(_parent); if(heuristicRequest == SimilarInterfaceNames.class) heuristic = new SimilarInterfaceNames(_parent); if(heuristicRequest == SameMAC.class) heuristic = new SameMAC(_parent); Is there any way to simplify that to dynamically instantiate the class, something along the lines of: heuristic = new heuristicRequest.somethingSpecial(); That would flatten that block of if statements.

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  • Sending an SMS in Android

    - by D4N14L
    Hey, I have been making an Android app which needs to send a text message. Here is the current code I have: public class getMessage extends Service { @Override public IBinder onBind(Intent intent) { return null; } @Override public void onStart(Intent intent, int startId) { super.onStart(intent, startId); client Phone = new client(); String[] msg = Phone.getMsg(user[0],user[1]); PendingIntent pi = PendingIntent.getActivity(this, 0, new Intent(this, getMessage.class), 0); SmsManager man = SmsManager.getDefault(); Log.e("GOT MESSAGE", msg[0]+ " : " +msg[1]); man.sendTextMessage(msg[0], null, msg[1], pi, null); Log.e("Message", "Sent the message?"); } Now, for some reason, the text message will not send using this code, and I'm not sure why. I was hoping that someone here could help me out in finding why this message won't send. No error is raised, nothing appears in the log (except for the log messages that I make myself in the code). Also, the manifest does have the correct tags. Suggestions?

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  • ontouch - Switching positions of two views(images) in Android

    - by idish
    I've been looking for that 2 days long and haven't found anything related to it. I'll give an example for my goal. Let's say I have 2 images positioned side by side horizontally. I want the user to be able to switch their positions onlongtouch listener. so let's say that the first image was on the left and the second was on the right side, after switching positions between them, the first image would be in the right and the second would be on the left side. Basically, it is just like in the launcher where you can switch apps positions. Please, if anything is not clear for you, I would like to know, and I'll try to explain it better, thank you.

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  • What is microbenchmarking?

    - by polygenelubricants
    I've heard this term used, but I'm not entirely sure what it means, so: What DOES it mean and what DOESN'T it mean? What are some examples of what IS and ISN'T microbenchmarking? What are the dangers of microbenchmarking and how do you avoid it? (or is it a good thing?)

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  • lookup datasource in context every time, Is it right?

    - by Srikanth Dyapa
    In my application i configured more than one datasource (for diff databases). Whenever user sends a request depends upon user category i need to look up for the respective datasource in the context and get a connection from that datasource to execute queries which are assigned to that user. Is it right way to achieve my requirement? I am using tomcat 6, struts 1.3. The databases may be oracle or mysql or both. Give me an optimized solution. Thanks in advance.

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  • Communicating between classes

    - by zachary
    I have a form that is divided into two classes. Each class represents the widgets on part of the form. What is the best way to allow these classes to share data between each other and update each other. Example: Button in class A is clicked. Update text field in class C

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  • Hibernate subclass with foreign key relationships

    - by shikarishambu
    I need some help defining the following object hierarchy/ database relationship in Hibernate From the object sense – Agent is inherited from Person and Agency is inherited from Organization. they are inherited from Party which can have multiple Addresses associated with it The database consists of Agent - ID - Name -PartyID (references Party.ID) Agency -ID -Name -PartyID (references Party.ID) Address -AddrID -PartyID (references Party.ID) -Street Party. -PartyID

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  • Key that yields multiple Results

    - by SgtStud
    I'm pretty new to programming so I'm sorry if this is a stupid question. I was wondering if there was a type of data that returns (possibly) more than one answer per key. For example: TestType<int,String> test = new TestType<int,String>(); So if you typed, test.getKey(1), you could get {"hello","this","is","a","test"}. Basically, is there a type of data that can return multiple answers, sort of like a HashMap and List combined?

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  • AtomicInteger for limited sequnce generation

    - by satish
    How can we use AtomicInteger for limited sequence generation say the sequence number has to be between 1 to 60. Once the sequece reaches 60 it has to start again from 1. I wrote this code though not quite sure wether this is thread safe or not? public int getNextValue() { int v; do { v = val.get(); if ( v == 60) { val.set(1); } } while (!val.compareAndSet(v , v + 1)); return v + 1; }

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  • Efficiently fill resultset in object model

    - by Zeeshan
    Hi, I have an object model whose structure is Dashboard  List of panels     List of containers       List of widgets If i get whole dashboard, with panels + containers + widgets, from Database then multiple I/O requires I want to get it in one I/O .For this i prepared a query which gives me this resultset. DASHBOARDID   PANELID  CONTAINERID  WIDGETID 13                          11                    5              2 13                          11                    5              3 13                          11                    6              4 13                          11                    6              5 13                          12                    7              6 13                          12                    7              7 13                          12                    8              8 13                          12                    8              9 Using list datastructure this model is able to be filled but it takes time i want to efficiently fill this resultset in above object model. is there nay way ?

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  • Is this Leftist Tree piece of code from Wikipedia correct?

    - by they changed my name
    Link public Node merge(Node x, Node y) { if(x == null) return y; if(y == null) return x; // if this was a max height biased leftist tree, then the // next line would be: if(x.element < y.element) if(x.element.compareTo(y.element) > 0) { // x.element > y.element Node temp = x; x = y; y = temp; } x.rightChild = merge(x.rightChild, y); if(x.leftChild == null) { // left child doesn't exist, so move right child to the left side x.leftChild = x.rightChild; x.rightChild = null; x.s = 1; } else { // left child does exist, so compare s-values if(x.leftChild.s < x.rightChild.s) { Node temp = x.leftChild; x.leftChild = x.rightChild; x.rightChild = temp; } // since we know the right child has the lower s-value, we can just // add one to its s-value x.s = x.rightChild.s + 1; } return x; } What makes me ask this question is: if(x.element.compareTo(y.element) > 0) { // x.element > y.element Node temp = x; x = y; y = temp; } Isn't that just not gonna work, since the references are only switched inside the method?

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  • Putting sql result set into JList

    - by 0vertone
    hi there. im working on my second year project and im nearly finished but ive got a problem. i have a table set up in oracle that holds user names, recipients, and messages. i wanted to make a contacts list for sendin messages that would take the user names and put them into a swing jlist but i cant figure out how. i thought maybe if i put the usernames into an array from the sql itd be easier but that didnt work. any ideas?

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  • Is it standard behavior for this code to throw a NullPointerException?

    - by Eric
    I've had a big problem in some library code, which I've pinned down to a single statement: System.out.println((String) null); Ok, the code doesn't actually look like that, but it certainly calls println with a null argument. Doing this causes my whole applicaio to throw an unexpected NullPointerException. In general, should println throw this exception under that circumstance, or is this non-standard behavior due to a poor implementation of the out instance?

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  • Better alternative for PipedReader/PipedWriter?

    - by Esko Luontola
    I need to have a buffered char stream, into which I write in one thread and from which I read in another thread. Right now I'm using PipedReader and PipedWriter for it, but those classes cause a performance problem: PipedReader does a wait(1000) when its internal buffer is empty, which causes my application to lag visibly. Would there be some library which does the same thing as PipedReader/PipedWriter, but with better performance? Or will I have to implement my own wheels?

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  • Sort a list with element still in first position

    - by Mercer
    I have a String list: List<String> listString = new ArrayList<String>(); listString.add("faq"); listString.add("general"); listString.add("contact"); I do some processing on the list and I want to sort this list but I want "general" still to be in first position. Thx ;)

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  • How do I iterate over an Array field reflectively?

    - by kunjaan
    I have Class<? extends Object> class1 = obj.getClass(); Field[] fields = class1.getDeclaredFields(); for (Field aField : fields) { aField.setAccessible(true); if (!Modifier.isStatic(aField.getModifiers()) && Modifier.isPublic((aField.getModifiers()))) { if (aField.getType().isArray()) { for (?? vals : aField) { System.out.println(vals); } } } }

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  • Simple question on database query.

    - by GK
    I have been asked in an interview, To write a sql query which fetches the first three records with highest value on some column from a table. i had written a query which fetched all the records with highest value, but didnt get how exactly i can get only first three records of those. could you help me in this. thanks.

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  • Select SWT Library depending on OS

    - by phineas
    How do I ensure when I distribute a JAR-file that the proper SWT-library (either the windows, the linux or mac version) is loaded an ready to use? It would be very helpful because then you can do one export and your application can run on any platform like Swing apps usually do. Thanks a lot

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  • Why is this giving me an infinite loop?

    - by Chase Yuan
    I was going through a code used to calculate investments until it has doubled and I received an infinite loop that I can't seem to solve. Can anyone figure out why this is giving me an infinite loop? I've gone through myself but I can't seem to find the problem. The "period" referred is how many times per year the interest is compounded. double account = 0; //declares the variables to be used double base = 0; double interest = 0; double rate = 0; double result = 0; double times = 0; int years = 0; int j; System.out.println("This is a program that calculates interest."); Scanner kbReader = new Scanner(System.in); //enters in all data System.out.print("Enter account balance: "); account = kbReader.nextDouble(); System.out.print("Enter interest rate (as decimal): "); rate = kbReader.nextDouble(); System.out.println(" " + "Years to double" + " " + "Ending balance"); base = account; result = account; for (j=0; j<3; j++){ System.out.print("Enter period: "); times = kbReader.nextDouble(); while (account < base*2){ interest = account * rate / times; account = interest + base; years++; } account = (((int)(account * 100))/100.0); //results System.out.print(" " + i + " " + account + "\n"); account = result; } The code should ask for three "periods", or three different times the entered data is compounded per year (ex annually, monthly, daily etc.) Thanks a lot!

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