Recent Posts
-
ORM – laravel 4: eager to load
I have a table called userwords with a word in it_ ID column, which I want to use to get rows from the words table and…… -
java – BufferUnderflowException？ here?
I am writing a small UDP server in Java When the server receives a command ('get_video '), it reads a file ('video. Ra…… -
Java – swingworker – we can call a swingworker from another swingworker instead of EDT
I have a swingworker as follows: public class MainWorker extends SwingWorker(Void,MyObject) { : : } I called t…… -
Get the location from the execution location of the Java code
I have a swing Java application that can save a lot of data (for example, you can consider games and their saving) The…… -
Java monthly timer
I'm trying to create a timer / TimerTask that will run on the same day of each month I can't schedule a repeat timer b…… -
Override the list result type in Java
I want to compile some variations of this code in Java class X { List<X> getvalue(){...}; } class Y extends…… -
Java – when using Grails sortedset, the first () element cannot be accessed from an empty list
I'm trying to dynamically create some Grails domain objects and then add a sortedset declared in another Grails domain…… -
Java ThreadLocal singleton – what is it?
Laymen say, what does it mean when someone says that an object is a thread singleton in Java? I'm attending a lecture …… -
STD:: sum of vector members C
I have sample classes: class Example { private: int testValue1; int testValue2; int testValue3; public: Examp…… -
What does javac – version show?
Even official documentation of javac Solution Javac - version tells you the JDK version That is, it provides informati…… -
Java – I can’t start the timer twice
I'm making a timer in Java. I need help The main class adds a swing timer I have a JFrame with two panels, one has jla…… -
Java – calculate occurrences in Multimap
I have a Multimap with multiple similar values: {Entertainment=[5],Food=[2,2,2],Products=[11],Health & Beauty=[3]}…… -
Parsing timestamp with time zone in Java?
I'm trying to parse a string of time stamps using the time zone obtained from DB The string is as follows: SimpleDateF…… -
Java – when deploying spring app in Tomcat 6, an “access denied” message appears
When I tried to deploy my spring application on Tomcat 6, I received an error message java.util.logging.errormanager:4…… -
Java – retrieves the number of types in the list
I have a list The list can contain multiple items of the same enumeration type Let's say I have an enumeration: toy is…… -
Is there a “noreturn” keyword in Java
Sometimes I want to write an error () function, which will eventually call system Exit(), which means that this functi…… -
Java – when to merge code duplicates
We use the code static analysis tool (sonar) to detect duplicate code in the project It seems that there are many repe…… -
Java – use jtextfield – cannot convert value to int
I want to start from JCombo@R_333_2419 @Get the selected value in, search for it in the database, and update the quant…… -
Java – automatically in ‘system out. Display date in println() ‘statement
I know that every line you print can be marked with a date (and saved as a log file) For example, in minecraft: [16:21…… -
How to implement (x POW y) in Java, where x and y are double?
I want to calculate the power of X, y, x, y are double values Why did Java give me a compilation error? What is the be…… -
Algorithm – search for the 7th largest element in the largest heap?
So my friend and I don't agree on this issue It requires the time complexity of searching the 7th largest element in t…… -
Java – under what circumstances thread Is sleep () the best way to pause a thread?
Thread. Sleep () seems like a very useless concept to me, because the only way I see it work is in the following scena…… -
Java – helps create generic classes to avoid code duplication
I have a simple question. Try to use appengine to keep dry The following two functions are the same except for the obj…… -
Too many Java – MySQL connections
I hate to ask a question that is widely asked on the Internet, but I can't seem to solve it I started a project after …… -
java. Lang. IllegalStateException: you need to use theme. In this activity Appcompat theme (or descendants)
I received this error while trying to run my Android application Oddly enough: it only happens when Android applicatio…… -
Java – why do derived class constructors always access base class constructors?
I saw this problem in a problem paper: Why do derived class constructors always access base class constructors? I wond…… -
Java – Android – error connecting using login URI
I'm trying to connect Google spreadsheets in my code It worked for some time, but recently it stopped working 06-01 17…… -
In Java, is it an existing object on the heap?
In Java, is it an existing object on the heap? I try to understand the difference between an uninitialized local varia…… -
Java says this method has a constructor name
I want to return the value of my array plus the return value of the recursive call But for some reason, Java doesn't w…… -
Java findbugs: suspicious comparison of long references
Findbugs identified the following error in my code: @ h_ 404_ 7@ if (materialDeFinition.getId() == deFinitionToRemoveF…… -
Java – how to find the maximum value in a binary tree
I have to complete the method maxelem (node) in this way, and the method maxelem () returns the maximum value containe…… -
Java – how to set the correct last modified header value for spring Web Services cached using spring cache?
I have a spring MVC controller: @Controller @RequestMapping(value = "/user") public class UserController { ..... ……