Recent Posts
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Java – NullPointerException in Avro reflectdatumwriter
I have a specific problem with Avro serialization of Java objects I have POJOs generated from the XSD schema, and then…… -
Java – replace duplicate substrings in string
I work in Java and I want to take the following string: String sample = "This is a sample string for replacement strin…… -
Java string finder – how do I switch case sensitivity?
I have a method to search the file for the string you give it and return a count But I have a case sensitivity problem…… -
Java – reload via array
So suppose I have an array of length 5 (let's call it myArray [5]) If I add 4 to myArray [3], such as myArray [3, 4], …… -
Java – why system Nanotime() is incorrect at the beginning of the iteration?
I noticed system The mode of nanotime() Whenever I start an iteration, nanotime () becomes very incorrect in a few lap…… -
Java generalized linear model library
I'm trying to port some R code to Java / Scala and need an equivalent GLM function Is there any Java / Scala library t…… -
Java – using interfaces on the service layer
In our project architecture, we use the classic MVC pattern, including the classic service layer (open transaction and…… -
java. sql. Sqlexception: user ‘admin’ login failed
Disclaimer: I have never used SQL server before I'm trying to connect to SQL Server Express using java code public cla…… -
The collection object cannot display the output of some undefined values in Java, ArrayList and collection
When I try to print a collection object, it prints employee @ 122392iie92 Why print this instead of the details of the…… -
What is the best way to split an array in Java into smaller arrays?
What is the best way to split an array in a Java method into smaller arrays? I want to be able to put arrays of any si…… -
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Java – countdowntimer cancel() does not work
I am new to Android development and try to make small games Any ideas? Thank you for your answer! CountDownTimer cdt =…… -
Java ternary operator syntax
See English answers > terminal operator, syntax error when using assignment In the first case, the ternary operator…… -
Java – GCM: how to send heartbeat to GCM server
I want to send a heartbeat from my application to the GCM server, so the connection will remain active How can I do th…… -
Java – Android NullPointerException when trying to retrieve data from sqliteopenhelper
When trying to retrieve all SQLite rows from sqliteopenhelper, I encountered the following error in logcat Caused by: …… -
The Java input date from scanner is on one line
I'm trying to read the date from the user to pass to the Gregorian calendar variable At present, I have an embarrassin…… -
Java Spring JPA FetchMode. Join does not use join
I use JPA to have a very complex model structure in spring When using spring data to query my database, I expect a que…… -
Java – how does the spring jdbctemplate record exception parameters?
Using spring's jdbctemplate, I've been trying to find a concise way to record exceptions in the Dao layer, but I can't…… -
The Java 8 stream aggregates a map
I tried to do something that seemed straightforward, but so far I have no luck I have a list of maps from a bunch of p…… -
Java – how do I set alerts that are always displayed?
Now, I just want to get some kind of battery status indication when the user accesses the application For example, if …… -
Java – how to obtain module int_ Max’s results?
If I try to apply: integer valueOf(String.valueOf(Integer.MAX_VALUE)“9”); But I need to get the remainder modulus from…… -
Java – how do I import my own classes?
I have this Java class: package myClass; public class myClass { private int herAge ; public void setHerAge (i…… -
Mouseevent – get mouse from a node_ After the pressed event, the mouse event cannot be obtained from any other JavaFX 8 node
I'm creating a rich text component that contains the selection function of JavaFX projects and face some difficulties …… -
Is it a Java RMI remote object (server) singleton?
I've been using Java RMI for some time, but I can't figure out whether RMI remote stubs (on the server side) is a sing…… -
Java – openshift Tomcat log: Catalina Out and localhost Out content
I have deployed my war application under the openshift tomcat7 cartridge In my application, I use log4j My log4j Prope…… -
java. Lang.numberformatexception: occurred for input string: ”
I have a problem deploying the application on the server (everything is OK on the local computer) In my application, u…… -
java. Lang. IllegalStateException: getoutputstream() has been called for this response
See English answers > getoutputstream() has already been called for this response 12 So I created a servlet and got…… -
Who can explain the steps to calculate this equation? Java
Write a program to calculate the following equation I'm not asking for a solution Yes, it's a homework question, but I…… -
Java – why didn’t this gridbaglayout appear as planned?
I try to achieve the final result required by setting an arbitrary width in gridbaglayout For reference, here is: This…… -
Java – how Jenkins finds out if a given slave server is running a job
I have this unique requirement to check whether a given node is running a job I'm thinking about using groovy because …… -
Java – how do I force MKDIR to overwrite an existing directory?
I need my program to create a directory with a specific name and overwrite any existing directory with that name At pr…… -
Java – remove the back arrow button from the action bar
In my android project, whenever I go from first activity to second, I get a left arrow button, followed by some text i……