Recent Posts
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Java – why does this Scala code throw an illegalaccesserror at runtime?
I have a simple application: object Test extends App { implicit def t2mapper[X,X0 <: X,X1 <: X](t: (X0,X1)) = …… -
Pattern: converting Java classes from pivot objects
I use an axis to automatically generate web service artifacts, and then I convert them into objects used in our applic…… -
Java – 500000 street names – data structure and purpose for fast search?
So we have many street names They came in with a document When starting servers in production, IDS may cache them The …… -
Java streams – filter previously filtered values
I am trying to use Java streams and try to find out the possible contents and their advantages and disadvantages At pr…… -
Java – how are software and game templates designed?
Please don't mind my question, because I know little about software, because I come from the network perspective For e…… -
Java – how to use the switch () statement to convert numbers to letter levels?
It's not homework, but it's a practice for the teacher to help us study the exam But I won't hand it over to the teach…… -
Java – SBT: how to package instances of classes as jars?
My code is basically like this: class FoodTrainer(images: S3Path) { // data is >100GB file living in S3 def train…… -
What’s the use of E. consumer () in Java
I didn't get a clear explanation about the use of e.consumer () when I searched on the Internet. E.consumer () is ofte…… -
Forms – wicket – reusable panel with Java inheritance
>I have the following Java classes: >I have two form components that map to type1task and type2task using compou…… -
Java – what is a good way to keep application properties?
I have a series of application properties, all of which have different types Types can include Boolean values, dates, …… -
Interface design: serialize java graphics into D3 js
I am currently discussing legacy Java Swing applications with d3.0 in my workplace Interface design between the final …… -
Convert the calendar object to a string in Java format, with the format “yyyy MM DD HH: mm: SS”
I am converting the date stored in the calendar object in the string into a query in MySQL I need a string in the form…… -
Java – how complex is the prims algorithm using priority queues?
I use adjacency matrix and priority queue is data structure According to my calculation, the complexity is v ^ 3 log V…… -
Java – invalid method reference for overloaded methods with different arities
Try compiling the expression comparator When comparing (string:: tolower case), the java compiler returns an error For…… -
How to use strips to clear bean fields
In JSP, I have the following fields: <stripes:text name="email"/> This field is in my action bean (fragment): pu…… -
Java – running standalone Hadoop applications on multiple CPU cores
My team built a Java application using Hadoop library to convert a pile of input files into useful output When I run t…… -
Java – how to use a custom sslcontextfactory in a restlet application running on jetty?
I'm trying to use restlet's clientresource to connect HTTPS to a server using a self signed certificate I use an indep…… -
JavaFX 2 charts and freehand zoom
This code draws xychart and performs freehand drawing using a combination of right-click and drag, while left-click an…… -
Run compiled Java code at run time
I want to run the previously compiled code It doesn't matter if I compile anyway, but running code is a problem My cod…… -
Java hashcode from multiple fields
In view of such a class: class MyObject { private String id1; private String id2; @Override public boolean eq…… -
Compare two integer arrays using java stream
I have two arrays of integers, for example – int [] a = {2,7,9} int [] b = {4,2,8} I want to compare it element by ele…… -
Java – inheritance relationship between square / rectangle (with constraint invariants) sharing quadrilateral cardinality
I have an interface polygon, and then I have a quadrilateral Then, I have two classes, square and rectangle, which ext…… -
How do I interpret runnable in a java thread without a stack trace?
I am debugging legacy Java applications, and the thread dump (obtained through jstack) contains some entries as follow…… -
Java-8 – why do filters with side effects perform better than splitter based implementations?
How to skip even lines of a stream obtained from the files Lines, I follow the accepted answer method and implement my…… -
Java: how to prevent ‘systemid’ #resolveentity (string PublicID, string systemid) in entityresolver from being absolute to the current working directory
I want to parse the following XML document to parse all entities in it: <!DOCTYPE doc SYstem 'mydoc.dtd'> <d…… -
Hash table – analyze the target and select a good hash function
This is not a specific problem of a specific solution; Instead, it's a response to any good stack overflow question I …… -
Java – how memory is allocated to lambda | how is it referenced through non superclass reference variables
I'm creating an implementation of the functional interface. Here's my code Consumer<Integer> consumer=new Consum…… -
Java – unsupported class: com mediatek. common. telephony. IOnlyOwnerSimSupport
After updating the dependencies, I did not respond after the application ran My dependence: dependencies { …… -
Java – use locale to change the English country name to German
I have this requirement. I need to convert the equivalent country / region code to German country / region name I'm us…… -
Java – the Tomcat docker container stops and exists after stopping the Tomcat server
I am using docker container / image here After running the docker container, everything is normal But if I run / usr /…… -
Java – how do I set the message when I get an exception
public class XMLParser { public class XMLParser { // constructor public XMLParser() { } public Str…… -
Java – algorithm: mixed mergesort and insertionsort execution time
Good day, so community, I am a CS student and am currently conducting an experiment combining mergesort and insertions……