Java
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Java – how do you unit test custom assertions?
Am I writing my own JUnit asset? How do I test? I know how to provide it with something that will pass and make it fai…… -
What are the best practices for Java – JDBC connections / result sets / statements
I want to know what is the best practice in the following code snippet. Do I have to close all stmt and RS every time …… -
Java – JNA pointer retrieval value
I am using JNA to access a DLL, everything is normal... I am debugging! The problem is that I run my java code in non …… -
Java – check if there is a card with name in CardLayout
I have a CardLayout. I only add cards as needed Therefore, when I need to display a specific card (identified by its n…… -
Java – JFrame multiple screens
I've been programming for Android, and I use intent to switch between specific screens I've always wondered how to do …… -
Overloading methods with derived types as parameters in Java
Suppose I have extended the existing code, but also avoid changing the code as much as possible Somewhere in this code…… -
Java – how to combine multiple multi page TIF files into one TIF
I tried to take multiple pages TIF files and combine them into a multi - Page TIF file I found some code in this quest…… -
Java – can ESB / BPM completely get rid of coding in addition to wrapping web services?
In the large company where I work, I have purchased a very (expensive) ESB, which aims to quickly align with business …… -
Java – how to set a formula in JDBC Preparedstatement
I have a Preparedstatement that I use to insert a pile of rows containing a large amount of column data However, for o…… -
Java – redraw graph on Jung
I use Jung (Java common network / graphics framework) to build graphics using the following code: Now, I want to add m…… -
Java – the ideal data source for stand-alone applications?
Suppose I create a standalone application in Java and distribute it through my website What I need to know is what ide…… -
How do I tell the java compiler to allow public as the package name?
In the GWT code, I use a Java sub package named public, which contains HTML / CSS / etc Documents I noticed that the j…… -
Java – JTable column headings are not displayed, but ‘a’, ‘B’,
I'm new to the Java GUI and I'm trying to make a table containing my socerteam score results At first I used the defau…… -
Java – private access with self-contained generics
Combining private field access with CRTP in Java seems to find a strange edge in visibility rules: public abstract cla…… -
Java is equivalent to typeof (someclass)
I try to achieve one Hashtable<string,-Typeof one Class-> In Java But I don't know how to make this work I tried…… -
java – Apache Commons Math 2.2 Percentile bug？
I'm not 100% sure whether it's a mistake or I didn't do the right thing, but if you give percentile data of the same s…… -
Java – serialization and subclasses
If I define a class as serialable, when I create a subclass, it will require me to define a serialVersionUID Is this n…… -
Is there the equivalent of colander / dictshield for Java / Scala?
Colander is a python pylons tool for: It is a bit like orm of semi-structured data; In my opinion, it will be particul…… -
java – org. apache. struts. action. Actionmessage cannot be cast to org apache. struts. action. ActionError
I'm working on Struts 1 2. Application I created a formbean that extends validatorform and then overridden the method …… -
Java – capture EditText lost focus
I am a long-term, self-taught amateur VB programmer. Now I am trying to teach myself Java and Android I say so, so you…… -
How does garbage collection work with session objects in Java?
How does garbage collection work with session objects in JSPS? Will each session collect garbage after the session exp…… -
Upgrade path of Java – JSON file format
We use Jackson to store user preferences for Java applications in JSON files As we continue to develop applications, w…… -
Java：System. Getenv (“appdata”) returns null. What is it now?
I just found that when a java program is started on windows as another user through "run as..." (from the context menu…… -
Java – how do you know all the exceptions that a method can throw
Is there any way to get some details about the exception security of Java standard classes? Mainly using C and C #, I …… -
Java EE – NetBeans generate different JPA code in “JPA controller from entity beans” and “JSF page from entity beans”
When using JPA entity beans in Java EE and web projects, there are two different JPA code generator wizards in NetBean…… -
Java – test for color equality
I was finishing the breakout task from the Stanford speech (still green) on iTunes u and got into a roar I'm trying to…… -
Java – PDF417 image generation API recommendation
In Grails application, I need to generate PDF417 image and send it by email Who can recommend me a (hopefully free) Gr…… -
“Change the modifier of ‘frame’ to ‘static’ in Java”
I was told by eclipse to change the modifier of my string variable to static I don't understand why I think I'm declar…… -
Java algorithm problem
Problem statement: in Java, given an integer array, can you select a group of integers so that the group is added to t…… -
Java – is it a good habit to package SQL databases in jars?
I want to create a Java library without any dependencies, but it needs to use an embedded SQL database Is it a good pr…… -
Java – bouncycastle error: the key type in the ECDSA based signer is not recognized
I have been using bouncy castle's encryption library and RSA's encryption library for some simple tests What I'm doing…… -
Java – typesafe delegation without instanceof
I have a service program: filter(List<Criterion> criteria); Is there a good way to internally assign method call……