Recent Posts
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Scope of the Java – do while loop?
In Java, the body of a do - while loop and the loop condition do not belong to the same scope Therefore, the following…… -
Java – enforces return types for classes that implement interfaces
How to enforce the getfoo () method in an implementation class to return a list of types of the same implementation cl…… -
Force target printer in Java
Is there any way to force the target printer to use hashprintrequestattributeset in Java? I don't want users to be abl…… -
Java – can date changes be detected on the JCalendar jdatechooser field?
I want to detect when to change the date in the jdate chooser field so that I can update another field Is that possibl…… -
How to calculate the number of rows of JPA 2 criteriaquery in a general JPA Dao?
I am a novice in JPA. To implement a general JPA Dao, I need to find the number of rows in the query result set to rea…… -
Java – find the difference between two strings
Suppose I have two long strings They are almost the same String a = "this is a example" String b = "this is a examp" T…… -
Java – get anchor from URI
I'm writing a JSP / servlet, and I'm trying to get the main part of the URI, for example: blabla.rdf#mark How do I get…… -
Rotate the image 90 degrees in Java
There is already an answer to this question: > java: rotating Images2 private void rotateClockwise() { …… -
Java – “return” stop executing the method?
I have written a method as follows: if (something) { return 1; } the rest of the code In my opinion, the method ret…… -
Java – is it a bad style to use NullPointerException to test null?
I have some code along the following pattern: return a().b().c().d().e(); Now, since each of these methods can return …… -
Using Java Exe executes silent mode
I wonder if there is a way to execute "Java. Exe" as a background process (in silent mode) For example: Java - CP. MyC…… -
Java – GWT: gotcha’s
My team is starting its first GWT project We are quite powerful for swing applications, and almost all our work involv…… -
Java – code color styles in eclipse
A good simple question: is there anything similar to http://studiostyl.es/ Eclipse? Update: since I use this link to l…… -
Java – used in Apache POI instead of the deprecated cellrangeaddress valueOf
I wanted to add conditional formatting in this region, but one of the methods I saw in the tutorial has been deprecate…… -
Macros in Java?
I know there are no macros in Java, but there is a solution to do this: #ifdef _FOO_FLAG_ import com.x.y.z.Foo; #else …… -
Java – general purpose card lists API calls in the file system of Hadoop
tl; Dr: in order to be able to use wildcards (globs) in the listed paths, just use globstatus (...) Instead of liststa…… -
Java – changing bit values with byte
I have some data in the field type byte (I save eight inputs in the byte, and each bit is an input) Solution Set the s…… -
Java – how does actionlistener work?
I have an idea of how to use action listeners and implement them, but I wonder if anyone can tell me how they listen t…… -
Java – error deploying to Tomcat
I use apache-tomcat-7.0 thirty-seven Git： https://github.com/IRus/jMusic When deploying an application: [2013-03-15 1…… -
Java – change the state of the toggle button from another button
I am using swing with eclipse and window builder pro to create a Java GUI I'm using jbuttons and jtogglebuttons I want…… -
Java – spring MVC @ requestmapping does not work
I have a strange situation where my controller is not invoked unless I map the scheduler servlet to the web / *. In XM…… -
Java – pdfbox: the problem of converting PDF pages into images
My mission is simple: convert every page of PDF file into an image I try to use the open source version of icepdf to g…… -
Clojure – why do I hang when a block is inserted into a channel? (core.async)
Consider the following code snippet: (let [chs (repeatedly 10 chan)] (doseq [c chs] (>!! c "hello")) (doseq…… -
Java – working sun misc. Base64encoder / decoder get bytes []
I tried to use sun misc. Base64encoder / decoder, but this Code: (new sun.misc BASE64Encoder()).encode(new sun…… -
Java – how do I prevent the spring boot daemon / server application from shutting down immediately?
My spring boot application is not a web server, but it is a server using a custom protocol (using camel in this case) …… -
In Java util. Date or Java sql. Select between date
I should use Java util. Date or Java sql. Date？ I have a visual fox database, and I have retrieved entities using the…… -
Java – spring auto assembly of parameterized collections
Hello everyone, thank you for your help I have a problem that spring cannot automatically assemble parameterized membe…… -
Java – reverse color
I have a user setting where they can choose the color of the alarm The alarm is the background color on the text or bu…… -
Java – recursively find the nth element in the linked list
I'm practicing basic data structures. I have some difficulties in recursion I understand how to do this iteratively, b…… -
Calculate Sha 3 hash in Java
I have been using the Sha-3 hash from the cryptojs (i.e. cryptojs. Algo. Sha3. Create()) library to the front end (see…… -
Java – how to run a single JUnit test method in eclipse?
There is already an answer to this question: > running a single JUnit test in eclipse 12 For example, how to run a …… -
Java – JAXB generated XML – root element prefix problem
I'm trying to generate XML using JAXB I created XSD and generated Java classes For example: I want a root tag <repo……