Recent Posts
-
Java – what is a hibernate dirty session?
I wonder if anyone can tell me what a hibernate dirty session is? I seem to have a problem with standard queries when …… -
Java – how to create a hazelcast instance embedded in process memory without networking?
In my unit test, I want to create an embedded (in-process / in memory) hazelcast instance that does not attempt to sta…… -
Java – sends a post request using a user name and password and saves a session cookie
After sending a post request with a user name and password, how do I save cookies using jsup? Or do I have to provide …… -
Java – how to write InputStream to a file using NiO?
I write InputStream to a file in the following ways: private void writeToFile(InputStream stream) throws IOException {…… -
Java – NullPointerException when trying to run Jar file
I've just started learning Java and only know a small amount of code, but it's still a simple program This is a prank …… -
Java – generate thumbnails of websites?
For my application, I need to dynamically create thumbnails of the website So far, I have such code from so: public cl…… -
Java – the strange “reduce” method group is in the jdk8 batch collection operation library
Why does the new jdk8 stream class only contain the following reduce methods: T reduce(BinaryOperator<T> reducer…… -
Java – slf4j log level as a parameter
There is already an answer to this question: > setting log level of message at runtime in slf4j11 Logger.log(Level.…… -
Java – the job gives an unexpected answer
Today, I encountered the following problems, and I can't seem to find a solution: int i,j,k; i = j = k = 3; i = k++;…… -
Removes a specific character from a string in Java
For example, when we specify the character to be deleted as aeiou, we give a string of "vowel war": Hawaii vs. groney,…… -
Java – why is anyvalue% 1 “stupid math” double anyvalue in sonar?
Sony math should not be performed Explanation In my case, anyvalue is a double This is as intended for me The followin…… -
Syntax – clojure: [] What do you do in the function parameter list?
I'm trying to solve clojure's joy and want to know_ The function of syntax in function parameter vector Example: (def …… -
How to read files from a remote system using Java?
I have a file copied on one computer and I need to access the file from another computer to update: I'm using Ubuntu L…… -
Java – how to set JSON instead of XML in Jersey?
Use Jersey java. Net if no title or is accepted in the URI How to set JSON to default serialization instead of XML whe…… -
Java – convert a C long type to JNI jlong
I use JNI to transfer data between C and Java I need to pass a "long" type and use something like this: long myLongVal…… -
Java – how to print exceptions using logger?
I have a situation where I want to use the logger to print all exceptions caught in the catch block try { File…… -
Multithreading – runspace problem with PowerShell: downloadfileasync
I need to download files using webclient in power shell 2.0. I want to display the download progress, so I do this: $a…… -
Java – ant waiting for file creation
Can ant be configured to pause the build process until the file is created (with a relative timeout)? Solution <wai…… -
Java – two different preparation statements in a single batch
I want to send two different prepared statements in a batch I'm currently doing two things. You can see its role in th…… -
Java – major. Not supported on Mac OS X El capital Minor version
Following the incorrect solution of Java in the major and minor versions of El Capitan, I see several solutions that e…… -
Java priority of multiple operators
This is more a theoretical problem to understand Java's evaluation of arithmetic operations Since and – have the same …… -
Java 8: find the index of the minimum value from the list
Say I have a list of elements (34,11,98,56,43) Using the Java 8 stream, how do I find the index of the smallest elemen…… -
Java – how do I know the number of worksheets in a workbook?
I use the HSSF API to read data from XLS files But there is no way to get the exact uncertainty Worksheet in workbook …… -
Java – how to learn jsp / MVC, previously in ASP Net MVC?
I'm just beginning to enter the Java world In the past three years, I have been in c# programming and have been doing …… -
Java – application engine data storage: how to implement posts and tags without connection?
I am building an application in Google App Engine (Java) where users can post. I am considering adding tags to these p…… -
Java – what is the best way to find all addresses at a specific distance from the selected point?
I'm developing an application that should display addresses in specific locations I know how to find the distance betw…… -
Java – Hibernate: how to use concat and group_ CONCAT
How to use concat() and group in HQL queries_ CONCAT()？ Solution About concat: its working principle is the same as t…… -
Java – how to run formbackingobject and referencedata objects in spring web MVC cycle?
I am new to the spring framework and try to understand the functions of formbackingobjects and compare them with the r…… -
Java – how to use mockito to display all simulated calls
One of my units failed the test. I'm not sure why I want to be able to see all simulated calls that occur in the syste…… -
Java – Jackson and jettison’s use in Jersey
The Jersey framework uses Jackson and jettison libraries for JSON unmarshalling / marshalling For the same JSON genera…… -
Java – spring data JPA If no result returns the default value, find max
I implemented in my spring repository interface: @Query("SELECT max(ch.id) FROM MyEntity ch") Long getMaxId(); If DB i…… -
Using Java objects as clojure mappings
I have a Java class that I want to use in clojure But I want to use it as a clojure map What steps are required to do ……