Search Results

Search found 35663 results on 1427 pages for 'embedded java'.

Page 618/1427 | < Previous Page | 614 615 616 617 618 619 620 621 622 623 624 625  | Next Page >

• Null pointer exception on .iterator() call

  - by Peter

  I'm getting a strange NullPointerException, evidently thrown by the following line of code: Iterator<Note> it = notes.iterator(); I've checked, and at the time the java.util.TreeSet notes is always non-null (with 15 elements). The TreeSet API says nothing about iterator() throwing NullPointerExceptions. What else could be going here?

  Read the article

• Jaxws notifications

  - by akmer

  Hi, Could you please help in the following? Is there an acceptable design guideline to implement WS Notification Messaging in java? My scenario is the following: a web service client makes a web service call to a web service. After that, the web service should be able to send asynchronous notifications to the web client (as a result of the first web method call). What approach should be used? Thank you, Regards

  Read the article

• How to handle error in this case? By Exceptions or boolean or something else

  - by TP

  I am trying to create a Response class in Java which has a method void setResponse(String response); Different response subclasses will have different requirements for the response. The string that is passed to the function is received from the user. What is the correct way of handling a wrong response? Should the function throw an exception like IllegalResponseException Should the function be declared like boolean setResponse(String response, String errorMsg) and return false if the response is wrong and set the error message to the appropriate value

  Read the article

• Floating point arithmetics restricted to integers

  - by user396672

  I use doubles for a uniform implementation of some arithmetic calculations. These calculations may be actually applied to integers too, but there are no C++-like templates in Java and I don't want to duplicate the implementation code, so I simply use "double" version for ints. Does JVM spec guarantees the correctness of integer operations such a <=,=, +, -, *, and / (in case of remainder==0) when the operations are emulated as corresponding floating point ops? (Any integer, of course, has reasonable size to be represented in double's mantissa)

  Read the article

• j2ee good and reliable books

  - by user161004

  Can anybody suggest some good books for starting J2EE? I have done Core and Advanced Java ( up to Swing).

  Read the article

• Set Date in a single line

  - by hibernate

  According to the java API, the constructor Date(year, month, day) is depreciated. I know that I can replace it with the following code: Calendar myCal = Calendar.getInstance(); myCal.set(Calendar.YEAR, theYear); myCal.set(Calendar.MONTH, theMonth); myCal.set(Calendar.DAY_OF_MONTH, theDay); Date theDate = myCal.getTime(); However, I would like something shorter to replace it with (ideally one-two lines). Any suggestions?

  Read the article

• Strange eclipse error

  - by Gandalf StormCrow

  Has anyone expirience this error before: this happens when I hit CTRL + space , here is the error : For those who has tinyurl blocked: This compilation unit is not on the build path of the java project. This is a maven project, mvn eclipse:eclipse doesn't help I mean it compiles and runs just fine just something is wrong and I can't figure out what. I checkouted this project from SVN, it wasn't developed on my PC.

  Read the article

• Eclipse Type Hierarchy Question

  - by Tom Tresansky

  In Eclipse, the Java Method Override Indicator is the little upwards arrow next to a method in the Type Hierarchy view. A solid arrow means a method overrides an existing method lower in the hierarchy. What does the hollow arrow mean? Do annotations effect either arrow?

  Read the article

• What is the performance cost of calling Thread.isInterrupted()?

  - by Michael Barker

  From the java sources, it look like to drops into native code. Is the cost roughly equivalent to a volatile read or does it need to acquire a lock of some type?

  Read the article

• Can I assign array size using NSMutableArray?

  - by Tattat

  I used to be a Java Programmer, which the array need to declare the very first time, like this: int[] anArray; // declares an array of integers anArray = new int[10]; // allocates memory for 10 integers I don't know whether the Objective C , NSMutableArray also give me this ability or not. Actually, I want to make a 10*10 array. thz in advance.

  Read the article

• CMS for a fairly large Mobile Website - Please Help Select.

  - by Vinod

  I am looking for :- A mature, scalable and proven CMS solution With Support for Mobilization (Android and iPhone) Good Amount of Customization using Java / .NET Lots of out of the box components to choose from. Please help with recommendations. p.s Are there any Mobile CMS providers which works in a SaaS model?

  Read the article

• android get URL path

  - by Tom91136

  I've got a string: public://imageifarm/3600.jpg How can I extract the imageifarm/3600.jpg Part out using android? What I've tried so far: URL drupalQuestionNodeImageURI = new URL("public://imageifarm/3600.jpg"); Log.d("TAG", drupalQuestionNodeImageURI.getPath()); but it throws this exception: 09-16 17:24:39.992: W/System.err(3763): java.net.MalformedURLException: Unknown protocol: public How can I solve this? I know I can use regular expressions but that seems to defeat the purpose of URL(URI) in this case.

  Read the article

• The fundamentals of Hash tables?

  - by kylex

  I'm quite confused about the basic concepts of a Hash table. If I were to code a hash how would I even begin? What is the difference between a Hash table and just a normal array? Basically if someone answered this question I think all my questions would be answered: If I had 100 randomly generated numbers (as keys), how would I implement a hash table and why would that be advantageous over an array? Psuedo-code or Java would be appreciated as a learning tool...

  Read the article

• How to switch between the two spring context in runtime?

  - by Selector

  I have current ApplicationContext and I want to replace it by newAppContext ApplicationContext currentAppContext = getOldAppContext (); ApplicationContext newAppContext = loadAppContext (); If i do: currentAppContext.stop(); currentAppContext.close(); currentAppContext= newAppContext; And then try: currentAppContext.getBean("SampleBean"); I have follow error: java.lang.IllegalStateException: BeanFactory not initialized or already closed - call 'refresh' before accessing beans via the ApplicationContext How to substitute spring context?

  Read the article

• Set seed on Math.random()

  - by Kevin

  Hi - I need to write some junit tests on java code that calls Math.random(). I know that I can set the seed if I was instantiating my own Random object to produce repeatable results. Is there a way to do this also for Math.random() ?

  Read the article

• Can I move another program's window to the front of focus?

  - by TwentyMiles

  I am interacting with a third party application using it's API, and would like to move it to the front of focus (so that it is on top of all other open windows) when a user performs a certain action. While I can move my application up and down in the hierarchy pretty easily, there doesn't appear to be a way to interact with other windows. Is it possible to move another program's window to front with Java?

  Read the article

• Is Spring hard compared to Ruby on Rails?

  - by johnny

  If I have no to little experience in either of them, but know enough Java and Ruby to be comfortable, is one framework harder to learn than the other? Is one easier to use for the beginner on these? I know it is hard to answer. Just looking for general thoughts on it.

  Read the article

• Dependency Injection: What's wrong with good old-fashioned refactoring?

  - by Chuck

  DI creates an extra layer of abstraction so that if your implementation class ever changes you can simply plug in a different class with the same interface. But why not simply refactor when you want to use a different implementation class? Other languages like Python and Ruby work fine this way. Why not Java?

  Read the article

• How can I convert IPV6 address to IPV4 address ?

  - by newbie

  I have application that uses IPV4 addresses (it stores them as long), so it only understands IPV4 addresses. Is it possible to convert IPV6 address to IPV4 with Java?

  Read the article

• Web Application

  - by Raydon

  I'm designing a web application. I was wondering if it was feasible to design a php front end (using some php framework e.g. CakePHP), which stores and retrieves data to display to the user. Then develop a java backend which listens to the database for changes, and depending on what was changed, performs some actions and updates the database. Any thoughts on this type of implementation would be appreciated.

  Read the article

• Why does date is calculated from January 1st, 1970 ?

  - by Vijay Shanker

  Hi, Is there any reason behind using this date as standard for time manipulation? I have seen this standard in Java as well as in Python. These two languages I am aware of. Is other popular languages also follows the same standard? Please describe.

  Read the article

• What does it mean when a ByteInputStream keeps returning 0?

  - by Zombies

  I have a ByteInputStream, created from a Socket in Java. The connection is to a simple web server that uses chunked transfer encoding. The web server does in fact work in normal browser. But in my program, I am attempting to read, I read the first first bytes (some 5kb of data). But each read after that returns 0 bytes read. Isn't it supposed to block until it can read?

  Read the article

• JSONDeserializer.use doesn't convert correctly

  - by user530846

  I'm trying to use flexjson to convert the following json string into a java object: {"inboundDataNotification": { "callbackData": "12345", "inboundData": { "message": "Hello World", "messageId": "mes1234" } }} Using the following method: import flexjson.JSONDeserializer; @RooJavaBean @RooToString @RooJson(fromJsonArrayMethod="", toJsonArrayMethod="", toJsonMethod="") public class InboundData { private String messageId; private String message; public static InboundSMSMessage fromJsonToInboundSMSMessage(String json) { return new JSONDeserializer<InboundSMSMessage>().use(null, InboundSMSMessage.class).deserialize(json); } } All fields are null after this method is invoked. Any ideas what to change here?

  Read the article

• Please explain the usage of Labeled Statements.

  - by kunjaan

  Is breaking and continuing the only uses of labeled statements in Java? When have you used Labeled Statements in your programs?

  Read the article

• Scanner method to get a char

  - by bizarrechaos

  What is the Scanner method to get a char returned by the keyboard in Java. like nextLine() for String, nextInt() for int, etc.

  Read the article

< Previous Page | 614 615 616 617 618 619 620 621 622 623 624 625  | Next Page >