Java
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Multithreading – JPA and threads in the playback frame
I'm trying to create a multithreaded server The problem is that I received the following error: What I want to do is a…… -
java – Spliterator – size vs subsized flags
https://docs.oracle.com/javase/8/docs/api/java/util/Spliterator.html >Is there a case where the sized flag is on bu…… -
Java – tableview cell span
Is there any way to make TableCell horizontal span? I want to create a tableview similar to the one shown in the figur…… -
How do I delete extra space between rows in Jasper reports?
This is my JRXML Code: <?xml version="1.0" encoding="UTF-8"?> <jasperReport xmlns="http://jasperreports.sourc…… -
Java – eclipse and NetBeans web services tools
Some time ago (about 4-5 months ago), I attended a lecture on Java EE, and at some time, the lecturer began to discuss…… -
Java – how driver classes reside in JDBC 4
A good addition in version 4 of JDBC is that you don't have to load it explicitly What's my problem? What if there are…… -
Java – is the localecontextholder secure in the service layer
According to the official documents, the localecontextholder is: So it's related to the current thread, but it's about…… -
Java proxy authentication
I have a Java webapp running in Tomcat 6 that loads RSS feeds from remote URLs I use Rome to handle RSS feeds and diff…… -
Java integer tags and bitwise operations for memory reduction
Is the use of integer tags and bitwise operations an effective way to reduce the memory footprint of large objects? &g…… -
Do java 8 lambda expressions use GPU?
I recently got in touch with Java 8 and I'm trying to learn lambda expressions IntStream.range(0,(screenSize.width * s…… -
Java – how to set a value to a class variable without using a setter
I want to insert a value into the object variable without using a setter How is that possible? This is an example Clas…… -
Java – using wildfly 8’s simple rest API
First of all, I am a novice in this environment I've developed Java before, but I'm not an application server I've nev…… -
Java – JSP string format truncation
Does anyone know how to use tag library to truncate strings in JSP? I want to use Jakarta taglibs, but say it's retire…… -
Java – where can I specify Jackson serializationconfig. In spring 3.1 Feature settings
I'm confused about why the default Jackson is included. Spring seems to have customized the default Jackson configurat…… -
Java – can I statically import private subclasses?
I have a private enumeration. Don't expose it outside class Anyway, can I statically import this type so that I don't …… -
Java Apache spark: long conversion chain leads to secondary time
I have a java program that uses Apache spark The most interesting parts of the program are as follows: long seed = Sys…… -
Java – find JDBC datasource in WebSphere 8.5
I want to use JDBC connection in my webapp, which is configured in WebSphere (like here: how to use JDBC in JavaEE?) I…… -
Java byte data type
In the sun tutorial, it says a byte: How does it save memory? What is 2's praise? Solution It saves memory by consumin…… -
Java – HTTP header is used to “accept” httpurlconnection get request
I have read some related questions, but unfortunately they didn't answer my questions because I had specific requireme…… -
Java – is there any way to make SharedPreferences global in my entire Android application?
Is there any way to make SharedPreferences global in my entire application? Now I use these lines in many parts of the…… -
Java – change the shape of the scatter point
I have thousands of points on JfreeChart's scatter chart //* I'm using shapeutilities, but when I use xyitemrenderer /…… -
Java – fileoutputstream: does the “close” method also call “flush”?
I really care about the flush and close methods In my code, I always close my fileoutputstream object But I want to kn…… -
Java – hibernate – forces container resource cleanup when a transaction completes
After several queries are executed, I get the following message from Hibernate: HHH000106: Forcing container resource …… -
Java – use Apache POI to thicken the entire line
I'm using Apache POI's HSSF workbook to write data into an Excel spreadsheet I want a whole line bold Can anyone sugge…… -
Download and write files using retrofit and rxjava
I'm downloading a modified PDF file. The way I download it is block I use the content range header to get a byte range…… -
Java array list problem
I have the following java code, int a[] = new int[] {20,30} ; List lis = Arrays.asList(a) ; System.out.print(lis.conta…… -
Java – how to disable echo when sending terminal commands using Apache commons net telnetclient
So, I have this class using org apache. commons. net. telnet. Telnetclient class It attempts to send a command and rea…… -
Java – what is dot casting?
In this Code: c = (char)(c - 'A' + 'a'); Why do we need a char? Is that foundry right? Suppose that C on the right sid…… -
Java – is it effective to handle runtimeexceptions in some cases?
As I have understood from several tutorials, runtimeexceptions should not actually be caught because they should revea…… -
Java – Android canvas does not draw path. When the point of path is not present
I encountered some problems with Android canvas when drawing the path canvas.drawPath(polyPath,borderPaint); I also ha…… -
Java – struts 2 “%” and “#” login to ognl
Can someone tell me how to use the "%" and "#" numbers in Struts2 ognl? I'm around Google, but I can't find any valuab…… -
Java – Android: the sampling microphone does not record to obtain real-time amplitude / level?
I'm trying to get the microphone amplitude level on Android: MediaRecorder recorder = new MediaRecorder(); recorder.se……