Java
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Java – OO game design issues
I'm writing a simple game in Java, but I'm trying to be 'right' with a beautiful and clean design without hacker attac…… -
Java wildcards behave strangely when classes are generic
I think I have some good understanding of Java generics This code is not compiled. I know why We can only pass the typ…… -
Java – string constant pool and intern
I've tried to understand the concepts of string constant pool and Inter in recent days. After reading many articles, I…… -
java – HttpProtocolParams. Setuseexpectcontinue (params, false) – when is it set to true?
I'm using org apache. http. impl. client. Defaulthttpclient retrieves XML from WebService and tries to determine wheth…… -
Java – use application Properties is localized to logback.com in spring boot Location of XML
How to use application Properties customize logback in spring boot Where is the XML? I tried the following, but it did…… -
Java – static variable vs volatile
I'm just asking questions from a thread perspective... I may have answered many times, but please help me understand t…… -
Conflicting overloading of Java – hamcrest matcher
The matcher isiterablecontaininginanyorder has two overloads on the static factory method containsinanyorder (both hav…… -
Java speed access array index and temporary variable
What is java faster Directly access the array index multiple times, or save the value of the array index to a new vari…… -
Java – how do I use garbage collection to delete files?
Hi, I use a lot of temporary files in Java. My problem is that they won't be deleted There is no need to implement my …… -
Java – use mockito’s argumentcaptor class to match subclasses
The following code shows my problem In fact, I'm trying to use mockito's argumentcaptor to verify whether a method is …… -
Missing project in Java build path – project settings
Import two Java projects for the eclipse workspace: > MainProject > SecondProject Mainproject. Is required on th…… -
Java – polymorphic deserialization of JSON using Jackson, and the property type becomes “null”
I'm using Jackson to convert a large JSON string into categories and subclasses I have a list of objects. Each object …… -
Java – Dbunit error – the following bean is missing: [dbunitdatabaseconnection, datasource]
I'm trying to use Dbunit to load multiple databases from different configuration files (different projects) In my foo …… -
Java – why does the time zone mode “oooo” not display the full GMT 00:00 offset format?
Is this an error or a function? Datetimeformatter Javadoc clearly states that when I use oooo mode in the formatter, I…… -
Check whether the Java object is an array type in JNI
Suppose I have a MyClass class in Java, is there any way to check that the jobobject is MyClass [] [] in JNI? My initi…… -
Java – hibernate cascading delete does not work as expected
I'm using hibernate 3 and trying to delete records in the database, and deletion doesn't work properly Pattern hiberna…… -
Java – Stax parsing – resolves child nodes based on the selected parent node
I need to parse a huge XML file on the server and send it to the client Solution >No, you can't skip the subtree of…… -
Java – can I nest classes in enumerations and create ArrayLists in enumerations?
I'm trying to do that I have a week's schedule I use enumeration because weekdays are constant public enum WeekDay { …… -
Java – JfreeChart: you need to delete the vertical white line in the stackedareachart
I created a stacked area map A vertical white line appears in the chart I need to remove the vertical white line How c…… -
Random identifier in Java
I want to generate random identifiers in Java The identifier should have a fixed size and the probability of generatin…… -
Java – opencv mat processing time
I want to know whether the SRC (source) and DST (destination) of OpenCV function have different variables that will af…… -
Is general SQL query in Java feasible?
If I have a method to create an SQL query, it is as follows: public List selectTuple() { boolean status = true; …… -
Compile Java and xStream. XML with gcj (exception: cannot create xmlpullparser)
I am strengthening a client, which is part of a larger project Due to insufficient speed, I was forced to switch to CN…… -
Innovation / security method of data protection based on shared key in Java
I have been trying some basic encryption techniques in Java (my preferred programming language), and there is a simple…… -
Java – do not generate log files until Weblogic is restarted
I am developing an application deployed on Weblogic 10.3 It is packaged as ear and contains a module The application i…… -
Generics (and wildcards) in Java
I'm reading a book on Java. It tells me that the following two pieces of code are equivalent: public <T extends Ani…… -
java – file. canWrite(); file. canRead(); file. canExceute(); Although my file / directory does not have access rights, it always returns true
I need to check the permissions of the files / directories I use //filePath = path of file/directory access denied by …… -
Java – use the runtimemxbean instance and system Getproperties reads the difference between system properties
What is the difference between reading system properties in this different way RuntimeMXBean RuntimemxBean = Managemen…… -
java. io. Is filedescriptor #sync() specific to a single filedescriptor
I want to force synchronization to disk after writing files at some point in my application Because it runs on Linux, …… -
java – Class. Getresource (classname) gave me NullPointerException
I have built a platform - independent library and I want to use it in J2SE and Android projects In this library, I hav…… -
Java – filter collections using lambdaj
I have two classes: public class Order{ private Integer id; private List<Position> positions; ... } ……