Recent Posts
-
Java – how does hibernate ensure that the L2 cache is updated with the latest data in the database
I've read about using hibernate's L2 cache, which can improve application performance by reducing database hit data / …… -
Java – Super call in custom exception
I just want to know what we call super. in the custom exception we created. public class MyException extends Exception…… -
RX Java – what is compositedispose in rxjava
I'm an Android student I think leans RX Java My question is "what is compositedisposal in Rx Java" PL detailed descrip…… -
Java – logging and dependency injection
I try to build and applications based on Java For dependency injection, I use Google Guice Now I came up with the prob…… -
Java – how to load fragments in viewpager to select
Im uses three segments in viewpager. The problem of loading big data in large data loader works well in devices like H…… -
Lambda – merge different types of mappings into one in Java 8
There are two maps >< integer, string > MAP1 is < ID, question > < integer, string > MAP2 is <…… -
Why is it necessary to return a response object instead of a string object to an HTTP request in Java?
I defined my rest method to return a string data type as a response to an HTTP request That's it: @Path("/users/{name}…… -
Search date range using Lucene in Java?
Can I search for a date range using Lucene in Java? How to build Lucene search query based on date field and date rang…… -
Java – stop all tasks in executorservice
I have some executor services to schedule local tasks, such as reading files, connecting to databases, etc These proce…… -
How do I return an instance of an object of the same type as the class passed using java 6?
I want to return an instance of an object of the type of the incoming class object The type passed in can be arbitrary…… -
Java – automatically create unit tests (semi)?
Is there a framework that supports generating some standard unit tests from annotations? An example I think of is: @Ha…… -
Java – what is the difference between atomicreference and synchronized?
What is the difference between atomicreference and synchronized? public class Internet { AtomicReference<String…… -
In Java, when is the constructor of an enumeration constant called?
To use a creative example in Java, here is the code: enum Commands{ Save("S"); File("F"); private String sho…… -
Subdivision objects in Java
I have a huge object. Of course I have its class. I extract some values from it, but because it's really big, I don't …… -
Java – using paint Setstrokejoin() and paint setStrokeMiter()
I am curious about what these methods do and how to use them, because there seems to be no detail except the single se…… -
java – joda-time：new DateTime(String)vs DateTime. parse(String)
Using the joda-time-2.0 version library, I want to know which function is more suitable for building from ISO date (up…… -
Java – how to use polynomials instead of bits to improve performance?
I have a 128 bit string, and my supervisor asked me to express the 128 bits as polynomials This is a scan of the paper…… -
Java – how to use jmockit to pass an empty string to a private method during unit testing?
The following is the private method in my datatap class. I tried to JUnit test this private method with jmockit – priv…… -
Java – button click causes the application to crash
I just set up an onclick method, which is written in the activity class and will be called as soon as I click the butt…… -
Check whether the user is root in the Java application
How do I verify that the user is root in a Java application? thank you Solution Simple Just use System.getProperty("us…… -
How to force the java server to accept only TLS 1.2 and reject TLS 1.0 and TLS 1.1 connections
I have an HTTPS web service running on Java 7 I need to make changes so that the service only accepts tls1 2 connect a…… -
Java EE – why not use session beans instead of message driven beans?
I wonder, why not use session beans instead of message driven beans? If you can call remote methods from EJBs, why sen…… -
How do I check if a string contains the second string in its character order?
I've just started and I'm completely lost in how to do this I want to be able to check whether the string has a smalle…… -
No Na in R forces the conversion of characters to numbers
I work in R and have a data frame DD with a digital vector_ 2006. When I first import data, I need to delete $, decima…… -
Java – I can deploy my on the nginx server war
I really like the stability and way of nginx And I really like Tomcat's Java and user-friendly Is there any way to dep…… -
Java – size of serialized null values
I have to send a complex object over the network. These references are almost null, but I want to know the size of the…… -
java – Collections. synchronizedMap(new LinkedHashMap()); Map thread is not made safe
I am using the following construct to create a thread safe map Collections.synchronizedMap(new LinkedHashMap()); Altho…… -
Java – how to reduce the “cyclomatic complexity” of the following code
I want to know how to reduce the cyclomatic complexity of the following code, if this is something I should worry abou…… -
Java – display HTML5 in swing
There are many questions about displaying HTML content in swing applications But no library supports HTML5 (I can't af…… -
JavaFX tableview resizes to fit the window
I'm trying JavaFX and forcing my way because it's hypothetical and future I'm trying to create a 4 - column table The …… -
Draw lines on the canvas with the mouse: Java AWT
The attempt is to draw a figure (now a line) with the mouse on the AWT canvas I tried java graphics for the first time……