Queue which wait until something happen
I want to implement the queue, which waits for shared resource. When this resource is free, queue take the first added element and change the info in this resource. But when no, just wait. Is there any...
View Articleissue in ‘onCreate’ methode on android
Before everything, I apologize, my question might seems silly. I’m a beginer with the making of android software. I’m seeking help because i have got no idea where the problem comes from. public class...
View ArticleJPA and Postgres generate_series
I have problem with JPA. I start with something like that (I have reduced the query to a fragment that causes an error): entityManager.createNativeQuery("select * from generate_series(:from::date, :to,...
View ArticleIs there something like a "build-once" builder?
our framework provides some kind of “log” objects; which actually represent legacy structures in our legacy C/C++ code. Today I started writing a helper class that uses the builder pattern to allow a...
View ArticleHow to click and drag something without it deselecting
The program is an animation that creates a car and/or truck icon on the screen. The way I have it now it isn’t working correctly. Specifically, the program is not clicking and dragging right. If one...
View ArticleCompare two regions of char array in Java without creating new objects
Is there a way to compare two regions of a char array in Java (or of two different arrays) without creating new objects in the heap? I know I can do something like this: char[] region1 =...
View ArticleJPA Joined inheritance query
I’m new to inheritance in JPA. I dont know how to query something like this: Let’s suppose a joined inheritance mapping where A is an entity with ‘id’ and ‘name’. And there are entities A1 and A2...
View ArticleHow to stop execution of a called method in java and continue execution of...
Consider the following code snipett: public String testMethod1(int i, int j) { //do something testmethod2(i,j); return "some string"; } public String testMethod2(int i, int j) { //do something if(some...
View ArticleLearn Java Technologies [on hold]
Sorry for my English. I could be wrong and write unintelligible sentence. But I want to learn English and Java. Please understand )) I learn JavaSE and something from JavaEE in courses. We will go to...
View ArticleCleanly wrap a legacy class with lots of overloads behind an asp.net webapi?
I have a class which I need to expose via a WebAPI. However, the class has around ten overloads of the same method, ranging from four parameters up to around 12! I’m not in a position to change this...
View ArticleWCF timeouts only when using binary serialization
We have a .NET 4.0 WPF client application that uses WCF to communicate to a server component (hosted in IIS). Most of the communication is done using basicHttpBinding and SOAP (Content-Type: text/xml);...
View ArticleBoolean "!" Java
I need some clarification. So if someone does: boolean something = false; and then they do: while(!something){ } what exactly is that ‘!’ telling the while to do? also what is the if statement...
View ArticleonBackPressed() can’t make MainActivity to reload
I am trying to reload my MainActivity after I do something in my SettingsActivity. My Up button in SettingsActivity works great and reloads MainActivity when returned from SettingsActivity. But back...
View ArticleReading from a file without using Scanner
I’m reading from a pretty simple file that displays items and how much they cost. It looks like this: Shoes 10.00 Jersey 20.00 Cookies 15.00 Light Bulbs 2.00 Paper 5.00 I want to map every item to how...
View ArticleDateTime Filter AngularJS not Giving Correct Date?
I am using backend as Tomcat which gives me timestamp as follows :- 1448966450000 If I use the website to convert this time to datetime it gives me something like below :- 1448966450000 -> Wed, 02...
View ArticleForeach over certain part of a loop
Let’s say I have the following int array. String[] arr = {"Index0", "Index1", "Index2", "Index3",..."Index n"}; I can iterate over the entire array using: for (String eachIndex : arr){ //Do something }...
View ArticleHow do I take the result of something and use it
I’m trying to take the answer of my multiply code and then store it in a local variable called result public int multiply(int x, int y) { return (x*y); } is what I have so far. After testing it, I get...
View ArticlePassing List of Exception Types as type parameter to generic method
I’m trying to write a generic helper method that’d call methods and handle exceptions if any. The method should be able to accept a List of acceptable Exception types, and handle them in a specific...
View ArticleOne method called in several methods
I have a class that looks like this: class A { public void method1(){ iniCall(); // Do something finalCall(); } public void method2(){ iniCall(); // Do something different finalCall(); } // ... more...
View Articlewhy is FileReader not a class in NetBeans?
So I just switched to NetBeans today because my eclipse had been crashing for a bizillion times. However when I am learning something on reading files, I can’t seem to import the class for FileReader....
View Article