Recent Posts
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Splitting strings in Java streams
I have a POJO product List<Product> list = new ArrayList<>(); list.add(new Product(1,"HP Laptop Speakers",…… -
What methods can be used to return valid and invalid XML data from files in Java?
I have the following data, which should be XML: <?xml version="1.0" encoding="UTF-8"?> <Product> <i…… -
How to use a java interface with multiple implementation classes
public interface Foo { public interface Foo { } public class SpecificFoo implements Foo { } public interface SomeInt…… -
Java – an unexpected error occurred when using the expression language only for a specific attribute in JSP – please check this item
I have this unusual situation: I have a registrationvo, which has few properties and getter setter For example, city o…… -
In general, what does Java mean when it returns “incorrect parameters”
I am creating such a file try { File file = new File(workingDir,obj.getName() + ".xls"); outputStream = new Fi…… -
Binary and non binary socketing Java
I heard there was binary communication I'm a beginner in Java. I use plain text. I'm from Java sun. Com tutorial So I …… -
Java servlet pool
Servlets 101 under Tomcat 6: Someone can give me a good explanation of the best way, for example Create a collection o…… -
Java – is there any practical reasoning to force the build of the JDK version?
There is a maven enforcer plugin that can force the build to run only on a specific JDK version I wonder if there is a…… -
. net – LinkedList. Contains. What is the method used to compare objects?
LinkedList. Contains method (.NET 2) How to compare objects in it? (equal to "CompareTo") MSDN knows nothing about it …… -
Java-8 – stick with Java 8 streams
I'm trying to learn how to use streams in Java 8, but I don't know how to operate here I have a list of courses I need…… -
Java 8 stream, converting object list to map >
I've experienced some examples that don't work for me This is what I want to do: I have a list < someclass > of …… -
How to prevent Java from exceeding the container memory limit?
I am running a java program in the docker container with a memory limit of 4GB I have set the maximum heap to 3gb, but…… -
Java – how do I use a project in another project as a module?
I want to modularize the Android project so that it is easy to maintain in the future I wonder if it is possible to us…… -
Java – how to sort conditions using the flow API
I study stream API. I have this task I need to sort the list set according to their length order, and if several rows …… -
Java – hibernate is much faster when executing native queries
The following query should return about 800 objects The problem is that hibernate actually executes 800 queries to get…… -
How to correctly format SOAP message envelopes using a custom soaphandler
I have a class that implements soaphandler interface Handlemessage is defined as: public boolean handleMessage(SOAPMes…… -
How to use reference methods in unaryoperator Java 8
At present, I have an unaryoperator like this UnaryOperator<Object> defaultParser = obj -> obj; I don't know …… -
Java OS X dock menu
Can I add items to the application dock menu? Editor: I think I miss this problem. I don't want to find a way to add a…… -
How to rewrite the valuemapper function using java lambda
Is it possible / correct (to) or rewrite the following with lambda? Here, I provide an inline implementation for the k…… -
Java 8 stream priority filtering
My code looks like: for (SomeObject object : objects) { if (object.getSomething() == Something.somethingHighPriori…… -
Java – HTTP request object
Is there an object in standard Java se that can accept HTTP requests from sockets? I've found how to create and send o…… -
Java – finds the second min element from the array
Anyone can convert it in the Java function style (lambda): public int findSecondMin(int arr[]) { int min = Intege…… -
Java – shared variables without synchronization
I read from Java concurrency in practice that it is not good to share variables in threads without synchronization How…… -
A module error occurred while running the JavaFX media application
When I run a JavaFX 11 application with the following command: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -p ~/.m2/r…… -
Java – regular expressions that match strings from partial or hump cases?
Given a partial or humped string, I want a regular expression match For example, if the search set contains the string…… -
Java – pass reference type variables as method parameters
After running the following code, I get this output: Who can explain why the value of a variable of type person is cha…… -
Java 8 – streaming with objects and raw wrappers
I am using the Java 8 stream and trying to modify the object content in the foreach terminal operation The problem I f…… -
Java dynamic proxy without target object?
Strange question How to use Java's call interceptor when using a dynamic proxy without actually owning the target obje…… -
Java – how to collect logs in JBoss related to a single request?
I am developing a Java EE web application running under JBoss I want to do the following: when a user sends an HTTP re…… -
Java – how to sort a two-dimensional array in dictionary order?
Suppose we have a two-dimensional array as follows: int[][] source = { { 3,5,6,1},{ 3,3,-6},{ -1,-3,-5,{ 124,43…… -
Java – JIT – micro optimization – if statement elimination
We assume that we have the following code: public static void check() { if (Config.initialized) { ..…… -
Comet programming and ASP net
If an event occurs on the browser, I want to push the data to the user's browser We can do this using commet programmi……