Recent Posts
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Java – polymorphic call
I'm a novice to Java, and I've seen it in the code in many places that my old people claim List mylist = new arraylist…… -
Does the Java library manage CSS explosion or reuse?
Java asks: I'd love to use sass and compass, but they are Ruby programs, which will probably require some interesting …… -
Java bytecode: type of local variable?
According to this article http://slurp.doc.ic.ac.uk/pubs/observing/linking.html#assignment ： My question: why does by…… -
Java – hibernate batch deletion vs single deletion
Editor: according to some of my debugging and logging records, I think this problem comes down to why delete from tabl…… -
Java – how to calculate the number of instances of a specific class in ArrayList?
I have an array list that looks like: [new Class1(),new Class2(),new Class1(),new Class1()] I want to know the most ef…… -
Java method call expectations
This is a java program with two buttons to change the integer value and display it increase.addActionListener(incListe…… -
Java bean, BeanUtils and Boolean wrapper classes
I used bean utils to manipulate Java objects created through JAXB, and I encountered an interesting problem Sometimes,…… -
Java: pre, postfix operator takes precedence
I have two similar questions about operator precedence in Java First: int X = 10; System.out.println(X++ * ++X * X++);…… -
Java – the difference between restful WebService and httpservlet
See the English answer > servlet vs restful 1 Solution Rest is really an architectural style when designing APIs on…… -
Reduce the PDF file size of the drawing by filtering hidden objects
When generating a scatter plot of many points in R (for example, using ggplot ()), many points may lag behind other po…… -
java – Map. Add / addall operation not supported by keyset()
About the map < K, V > interface: Why does keyset () return a set that supports the remove operation but does no…… -
Maximize jinternalframe in Java
I try to maximize jinternalframe at startup I've searched the web and tried various code suggestions, but they don't s…… -
Java – spring-aspects-4 dependency not found
I want to upgrade my project to spring 4, but for aspectweaver-1.8 0.M1. Jar, I lack dependencies When I looked at the…… -
Java – how to set 40x errors using custom messages on jax-rs exceptions?
I am working on Web services on Jax - rs Now I'm looking for a way to catch some exceptions to send a custom message o…… -
Java – virtual web service
I received a WSDL file for the web service interface, which our system should call in the future Before that, I want t…… -
Java – unknownhostkey exception when accessing GitHub safely
I am using jgit to securely access the repository in GitHub I did the following to generate a secure communication key…… -
How to use java to type some text in the hidden field of selenium webdriver
I use webdriver and Java for test automation I have the following HTML code for hidden input fields: <input type="h…… -
Does Java 8 provide an alternative to the visitor pattern?
What's the difference between functional programming and object-oriented programming? Say I have an animal interface: …… -
Java – where can I place credentials when using Ivy League and private company repositories?
I use ant ivy, and our company recently set up a nexus server for our own private library Ivy can get dependencies fro…… -
Java – use org. Org apache. HTTP sends an HTTP post request with a soap operation
I'm using org apache. The HTTP API writes a hard - coded HTTP post request using soap operations import java.net.URI; …… -
Java – multiple dependency versions in gradle
I'm building a java project that uses gradle for version control I'm starting from the old version of drools rule engi…… -
Java – analyze JSON map / dictionary with gson?
I need to parse the JSON response: {"key1": "value1","key2": "value2","key3": {"childKey1": "childValue1","childK…… -
Java – JDK 1.7 jarsigner with HTTPS TSA is no longer valid
Looks like JDK 1.7 0_ The Thawte root certificate in 80 was revoked Using 7u80 jarsigner is no longer valid and worked…… -
Simple java date calculation
I want to do simple date calculation in Java For example, calculate the difference in days between dates (with a 0 tim…… -
Java – cobertura override and assert keywords
The line coverage of the unit test I measured on cobertura is being affected because I have asserted that it is not co…… -
Javafx-8 – how do I set up the controller in the scene builder?
I want to use scene builder for JavaFX applications I have a software package called testpac, which contains my folder…… -
Java – Request: https://www.w3.com Org / 2000 / SVG discovery: http://www.w3.com org/2000/svg
See English answer > XML namespace URI with HTTPS? 1 Now, when we render SVG files, we encounter this problem >T…… -
How do I create the following GUI in Java swing?
I want to create the following GUI with Java swing Since I don't have enough experience with Java swing, I'm not sure …… -
Java library maintains database structure
My application is always developed, so occasionally - when the version is upgraded - some tables need to be created / …… -
The Java – Scala ide – play 2 Eclipse Plug-in does not highlight the syntax of scala HTML templates
I installed the scala ide – play 2 plug-in (from http://download.scala-ide.org/play2/nightly_3.0-M_juno_2.10-M/site/ …… -
What is “self inhibition is not allowed”, and why does javac generate code lead to this error?
This new Java 7 try - with - resources construct is quite good Or at least, it was good until an exception ruined my d…… -
Java – method overloading uses float to display “incompatible type error” but does not contain double
I tried overloading the code with this method, and I got an error code: class Adder { static float add(float a,flo……