包含标签：Java 的文章
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java – . Nextval JDBC insertion problem
I try to sequence Nextval is inserted into the table as a primary key, and SQL in Java is sql = "INSERT INTO USER …… -
Java – how to control the centering of JButton HTML text in NetBeans?
I tried to put one or two lines on JButton; for example +----------+ | READER | | STOP | +----------+ But I can'…… -
No Na in R forces the conversion of characters to numbers
I work in R and have a data frame DD with a digital vector_ 2006. When I first import data, I need to delete $, decima…… -
Java – how to put Google Adsense in GWT
Does anyone know how to put Google Adsense ads in GWT web applications? Solution You can put the JavaScript code in Ad…… -
Java nested list to array conversion
What is the most effective way to convert data from a nested list to an array of objects that can be used as JTable da…… -
Java – logback – no line end delimiter
I'm using logback 0.9 21. Unfortunately, it prints all messages to a single line, without end characters, or even the …… -
How do I check if a string contains the second string in its character order?
I've just started and I'm completely lost in how to do this I want to be able to check whether the string has a smalle…… -
Get heap dumps from remote applications in Java using jvisualvm
I run jvisualvm (Windows XP, Sun Java 1.6.0.13, 32-bit client VM) to monitor remote applications (Linux, Sun Java 1.6.…… -
Java – POJO to org bson. Document and vice versa
Is there a simple way to convert simple POJOs to org. POJOs bson. Document？ I know there are many ways to do this: Do…… -
Java PBEWithMD5AndDES
I'm using password - based encryption My initial idea was to use AES to encrypt files containing passwords Prove that …… -
Java EE – why not use session beans instead of message driven beans?
I wonder, why not use session beans instead of message driven beans? If you can call remote methods from EJBs, why sen…… -
Java – is writer an atomic method?
I want to write some strings to the file Therefore, I use the bufferedwriter class Since many threads tend to write to…… -
Java – can I tell bufferedimage what the original file type is?
In my code, I have a bufferedimage loaded with the imageio class, as shown below: BufferedImage image = ImageIO.read(n…… -
Java – why toolkit getDefaultToolkit(). Beep() does not work in windows?
When I try to use toolkit getDefaultToolkit(). When beep() beeps, it doesn't seem to run on any of my windows computer…… -
RX Java – the difference between interval() and repeatwhen() for polling from observable in the interval
What is the difference between: Observable<String> observable = Observable .interval(0,1,TimeUnit.SECOND…… -
Java – good programming style when dealing with multiple objects
I've been programming a software version of a board game So far, I have written classes corresponding to physical obje…… -
Java – New phonegap 3.0 import org apache. Cordova can’t solve it
I'm using the omnipotent command line to install the new phone gap 3.0 cordova create hello com.example.hello HelloWor…… -
How to convert a string to a domsource in Java?
I need some help In my string filedata variable, I store an XmlDocument Now I want to convert this variable to domsour…… -
How to avoid memory waste when storing UTF – 8 characters (8 bits) in Java characters (16 bits) two-in-one?
I'm afraid I have questions about the details of a rather over saturated topic. I searched a lot, but I can't find a c…… -
Java – stream lists are grouped
I'm looking for refactoring how to use streams in some of my code The first example is my current practice The second …… -
Java – what is the difference between the non xadatasource with JTA = “true” and xadatasource?
I'm confused that we can allow JTA transactions using non - XA data sources So what's the difference between Xa and no…… -
How do I call clojure macros from Java?
Did you call the clojure macro from Java? This is what I am trying to do: RT.var("clojure.core","require").invoke(Symb…… -
Java – string tokenizer: separate strings with commas and ignore commas with double quotes
I have a string like the following – If I mark the string above, I get comma separated marks But I want to use the str…… -
Java – how should I check whether a stream is sorted?
Using Iterable < T >, it is easy to: T last = null; for (T t : iterable) { if (last != null && last.…… -
Java – does anyone locally parse Jax WS catalog. XML of schemalocation on metro xml？
I'm in my A jax-ws-catalog.xml file has been added to the war file XML to parse schemalocation. XML locally rather tha…… -
Java – export JSP tables to excel, word, pdf
Anyone can suggest me any library / jar file that I can use to export my table to excel / PDF / word Please tell me if…… -
Java – JDBC batch execution is extremely slow
Anyone can tell me what I did wrong. I execute 350 plug-ins in MySQL and it takes 40 seconds This is the code long t0 …… -
Unit testing – unit testing is worth the effort, in a large and old (5yr) code base?
I just joined a team that has been working in the main mode for the past five years (Java, Maven based projects) There…… -
Java – get the result of searchresponse in elasticsearch
I am trying to use es as the index of mongodb I successfully integrated them together, but I found the Search API quit…… -
Add – javaagent to Tomcat 6 server, where can I put it and what format?
I'm trying to install an application health monitoring application that can monitor J2EE Web transactions. I need to p…… -
Java – how is this eclipse view formed?
I am developing an eclipse plug-in, which will add a new context menu. When clicked, a dialog box will pop up, and use…… -
JavaBeans comparison
Does anyone know a free open source library (utility class) that allows you to compare two instances of a java bean an……