LxLxBlog

Java – interprocess communication between wars in the same container

What is the choice between two wars running in the same jetty container to achieve low latency communication? I basica……

Java

2020-02-19

Java – can anyone provide a good explanation for dagger 2?

It's really hard for me to understand dagger 2 dependency injection system I understand that using the @ inject annota……

Java

2020-02-19

Protected members access from different packages in Java – a curiosity

package packageOne; package packageOne; public class Base { protected void display(){ system.out.println("in Base"); }……

Java

2020-02-19

Java – why does NetBeans generate hashcode () in its way?

I've been using NetBeans for java development. There are some things I just rely on working without asking how These i……

Java

2020-02-19

Java – getgeneratedkeys() in Preparedstatement After executebatch()

I want to insert a few lines using Preparedstatement: ps = con.prepareStatement(query,PreparedStatement.RETURN_GENERAT……

Java

2020-02-19

Java – XPath: is there any way to set the default namespace for queries?

Is there any way to set Java XPath as the default namespace prefix? For example, instead of: / HTML: HTML / HTML: head……

Java

2020-02-19

What does Java – HashMap check when calling containskey()?

ArrayList<Integer> lis = new ArrayList<Integer>(); ArrayList<Integer> lis = new ArrayList<Integer……

Java

2020-02-19

Java – include the contents of the JSP in the servlet

I have this servlet: public class SaveImage extends HttpServlet { protected void doGet(HttpServletRequest request……

Java

2020-02-19

Pyspark: exception: the Java gateway process exited before sending the driver’s port number

I tried to run pyspark. Com on my MacBook When I try to start it, I get an error: Exception: Java gateway process exit……

Java

2020-02-19

Java – maximum size when parsing XML using DOM

I am currently implementing a rest client that will parse XML response messages Later, it will run on Android devices ……

Java

2020-02-19

Java – the most efficient way to calculate query rows

I'm using hibernate to retrieve the number of rows for a particular query Suppose I have a table named 'person', which……

Java

2020-02-19

Java – Final fields and anonymous classes

I'm still not satisfied with the explanation of anonymous class and final field There are many questions trying to exp……

Java

2020-02-19

Java – add code to package private library method

I have a library class that contains private methods Overriding this method directly through subclasses is not optiona……

Java

2020-02-19

Java – what is a component

I listen to podcast Java pose. There are often discussions about components here (note that components are not (clear)……

Java

2020-02-19

Java EE – inject CDI managed beans into custom Shiro authorizationrealm

In the application I'm building, we use direct Java 6 EE and JBoss (without spring, etc.), JPA / Hibernate, JSF, CDI a……

Java

2020-02-19

Java – how do I start and continue running HSQLDB in server mode in my web application?

I don't want to use it in embedded mode because I may allow other external applications to access it And I want to sta……

Java

2020-02-19

Java – cannot convert from actionprovider to shareactionprovider

I tried to implement a shareactionprovider in my actionbarsherlock The following code gives me this error: ReadingActi……

Java

2020-02-19

Java – imagine a real concurrency scenario where StringBuffer should be used instead of StringBuilder?

I know the difference between StringBuffer and StringBuilder read here！ Usually, as Javadoc says, However, the Javado……

Java

2020-02-19

Multithreading – cross thread communication in Delphi

Is there a document about cross thread communication in Delphi? How do I send messages to threads without windows? Sol……

Java

2020-02-19

Java pdfbox – read and modify PDF (Metaphone) with special characters

I'm trying to modify the PDF using this method (the first code block – use the pdfstreamparser and iterate over the pd……

Java

2020-02-19

Java – how to get the response body in zuul post filter?

How to read the response body when zuul is used as a proxy in the post filter? I try to call the code like this: @Comp……

Java

2020-02-19

The JavaFX CSS style of textarea does not work

I'm writing a simple JavaFX application, but I can't use some CSS styles This is the relevant CSS: .text-area { -fx-……

Java

2020-02-19

Java – MySQL InnoDB pending table level lock

I have a large production network application (GlassFish 3.1 MySQL 5.5) All tables are InnoDB The application hangs co……

Java

2020-02-19

Where can I find the source code of Java arrays?

Where can I find the source code of Java array? Example: double[] arr=new double[20];@H_301_5@ 所有具有任何维度的数……

Java

2020-02-19

The Java decompiler has the saved line number of the actual physical location

Many ide debuggers match physical line numbers http://java.decompiler.free.fr/ Not one Solution I have released a supp……

Java

2020-02-19