Recent Posts
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Java – simplejdbctemplate and null parameters
I use simplejdbctemplate and mapsqlparametersource in a simple way: MapsqlParameterSource parameterSource = new Mapsql…… -
Java – the comparator must override superclass methods
I'm making a treemap < < string, string >, and hope to arrange it in descending order I created the following…… -
Java – how to give an enumeration “valueof” with a class name?
Suppose I have a simple enum named animal, which is defined as: public enum Animal { CAT,DOG } I have a method, su…… -
Java – parsing of external (third-party) beans
I know it's still not very popular because the specification was released a few months ago I haven't "installed" weldi…… -
Java – symbol class onclicklistener not found
I'm a novice in Android development This is my problem Anyone can help me with this. I've been looking for a solution …… -
Java stream – collection combiner
Why the following codes: StringBuilder sb22 = IntStream .range(1,101) .filter(x -> x > 50) .@R_91…… -
Java – how to identify anonymous inner classes in notserializableexception
Trying to debug the application in NetBeans received the following error message: During debugging, I have to insert "…… -
Java Generics Pass . Class reference
I need to call a super constructor that requires me to pass a generic type Class reference How can I achieve this in J…… -
Can I use them in Java code to take advantage of kotlin’s coroutines?
What is my goal? My goal is to be able to use kotlin's coroutine system in Java I want to be able to pause execution f…… -
Java – GWT and guava issues
It's hard for me to get GWT to work with guava I added guava-r09-gwt.net to my classpath Jar and < inherits name = …… -
Java – best practices for installing third-party libraries into a hosted Maven repository?
Suppose you have a project that uses a third-party library, such as Google's Analytics data API (gdata), which does no…… -
Suggestions for good java build tools are well integrated with eclipse
I work in several modules (about 10 at present) of a small team (3 people) The compilation, integration and management…… -
Java – field lookup method of spring data repository
I have two entities, one user and one registered user The registered user has a field of type user I think there is a …… -
How to handle exceptions when instantiating class objects
java version "1.7.0_45" java version "1.7.0_45" Hello I'm initializing class methods in the constructor However, the n…… -
The Java conversion from PNG to JPG changes white to red
See English answers > JPEG image with wrong colors7 UploadedFile uf; //as a paremeter in function; PrimeFaces Objec…… -
Shadow of generic Java and type parameters
This code seems to work properly class Rule<T> { public <T>Rule(T t) { } public <T>…… -
Java – eclipse RCP: using the configuration directory
My eclipse RCP application needs a configuration file that contains some information about connecting to a remote data…… -
Java – grouping sequences is a subsequence of a given sum with dictionary priority
I'm looking for a way to search for subsequences in a given sequence that sum up to a given number (sum, here 4) and h…… -
Java – how to find fully qualified table columns from hibernate metadatasources
I have an entity, and I have a class < myentity > reference: @Entity class MyEntity { @Id int id; @Colum…… -
Java – extends multiple classes
I know that Java does not support multiple inheritance because it does not allow multiple classes to be extended I jus…… -
Java – syntax error on the expected token variabledeclaratorid after this token
In the next line, I get "syntax error of the expected token variable declaration after this token" listAq = new AQuery…… -
Version control – advantages and disadvantages of version control Javadoc
I'd like to know whether to submit Javadoc files to my project's SVN repository I've read about SVN good practices, in…… -
java. lang.NoSuchMethodError：org. springframework. http. MediaType. getCharset()Ljava / nio / charset / Charset
When I tried to run my TestNG test through ant, I got Java lang.NoSuchMethodError：org. springframework. http. MediaTy…… -
What are the Java system classes?
When I read some documents about assertions, I found that: java -ea -dsa Which is the system class? Solution According…… -
Java – how to use the web XML contains additional configuration files
I need to define many servlets, but I don't want to use them on the web Write all configurations in XML I can define s…… -
Java – JNA catch exception
I have a quick question about handling exceptions thrown by the Library under JNA JNA receives an invalid memory acces…… -
Java – how to use spring data to interact with elastic search aliases
Hi, I'm using elastic search for spring data The domain structure of my project is constantly changing So I have to de…… -
How do you get the mantissa of floating point numbers in Java?
I'm trying to get the mantissa of a floating point number (just for learning), but it doesn't work as expected Say the…… -
Converting classic nested for loops using java 8 streams
See English answers > Cartesian product of streams in Java 8 as streams (using streams only) List<Card> deck …… -
Java – real time thread synchronization with normal threads
How to synchronize a real-time thread with a normal thread in Java? For example, real time threads that calculate cert…… -
Java – how do I split strings based on the first occurrence?
How do I split a string based on the first equal sign "="? therefore TEST1 = TEST1 Should be converted to test1, test1…… -
Java – thinking in App Engine
I am looking for resources to help me migrate my design skills from traditional RDBMS data store to App Engine datasto……