包含标签：Java 的文章
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Java EE – inject @ EJB beans according to conditions
A novice question: can I inject different beans according to the conditions I set in the properties file This is what …… -
Java – convert bufferedimage to byte without I / o []
Hi, I have a buffered image instance in memory and want to convert it to byte [] to encode it into Base64 string witho…… -
Java – how to programmatically kill a storm topology?
I'm using a Java class to submit a topology to the storm cluster, and I'm also going to use a Java class to kill the t…… -
Java: accessing subclass variables using parent methods
I have the following conditions: public class A { private int x = 5; public void print() { Syste…… -
Java – converts a string to a date using a time zone
I have a string pattern yyyy MM DD HH: mm a I want to convert it to the following format yyyy-MM-dd HH：mm：ss Z What …… -
java. util. What is the runtime of equals() in arrays?
As the title shows, Java util. What is the runtime of equals() in arrays? For example, if you compare two ints [], doe…… -
Is there a way to disable short circuit evaluation in Java?
Say I have this Code: boolean ret = a() && b() && c() && d() && e(); E () is called on…… -
Selenium webdriver works but slow (Java)
I'm using selenium webdriver to capture screenshots of web pages It works well. However, the time from when I run in e…… -
How to quickly find main () in a java project and use eclipse?
In this case, I have a SRC folder of the project, which has many classes. How can I detect what classes start with the…… -
Java – counts objects with the same attribute value
I'm creating a poker ranking solution. I have to count cards of the same suit or the same ranking in a set of cards He…… -
What is the classpath in Java?
I wrote a program that works on my laptop, but I really hope it works on the server I own Using netbean, I have cleane…… -
How to upload and scan files with anti-virus software on Java?
I'm working on an application that needs file upload, and it also needs I've heard of the APIs application server prov…… -
Java – opencv’s performance in template matching
I'm trying to do template matching basically on Java I use a direct algorithm to find a match This is the code: minSAD…… -
How many array dimensions are supported in Java, such as [1] [1] [1]… [1]?
There is already an answer to this question: > maximum number of dimensions in a Java array3 Solution The array dim…… -
Java solutions for C-style compiler instructions
I have a Java array: String[] myArray = {"1","2"}; I want to assign different values according to the conditions known…… -
Java – Android 8 or later: check Google play service
The method keeps returning 0 According to the developer documentation, if the device obtains the latest version of Goo…… -
When do java generics use transformations at run time?
I'm reading a discussion about C templates and c# generics and how they differ from Java type erasure generics I read …… -
Java – disable digital grouping in jspinner
I need a widget to select TCP / UDP ports, so I wrote the following: public static JSpinner makePortSpinner() { fi…… -
How to randomly select a letter (A-Z) in Java?
If I want to randomly select a letter between a and Z, I assume I have to use the random class: Random rand = new Rand…… -
Java-8 – why can’t @ functionalinterface be applied to Sam abstract base classes
I just started learning camels. The first thing I saw was context.addRoutes(new RouteBuilder() { public void c…… -
Conditional if else statements in Java
See English answers > why does the internal operator unexpectedly cast integers? two public class Pre { public …… -
Java – retrieves the first number of a number
See the English answer > return first digit of an integer18 int number = 534; String numberString = Integer.toStrin…… -
Java – spring does not have an XML hibernate mapping class
In my ApplicationContext XML, this is how I map XML to POJO How do I map directories to class files without creating X…… -
Java – thread safe date parser
I am looking for a thread safe alternative to simpledateformat Parseobject is not implemented in the old fastdateforma…… -
Java – how to determine if the incoming connection is from the local computer
I have a socketserver that accepts incoming connections For security reasons, I should only allow local connections (f…… -
Does Java – mybatis implement JPA?
An easy question, I think Solution No, ibatis is not an ORM mapper like hibernate, so it does not implement JPA JPA is…… -
SBT java. io. IOException: not in gzip format
The windows 7 Pro computer did not shut down properly When the machine is restarted, running 'SBT test' will cause thi…… -
Java – how to limit the file types uploaded to spring mvc3 controller
I am using spring MVC 3 to handle the file upload of my web application Now, I can limit the size of the file being up…… -
JMX – MBean simple chart monitor
I have some JMX beans that expose performance information in my application I want to draw an MBean attribute in the d…… -
Java – detect objects (words) in images
I want to realize object detection in license plate (city name) I have an image: I want to detect whether the image co…… -
Java – how to determine if the incoming connection is from the local computer
I have a socketserver that accepts incoming connections For security reasons, I should only allow local connections (f…… -
JUnit – main difference: mockito and jmockit
This is what I found when I first tried to use jmockit I must admit that I found the jmockit document very concise abo……