Java
-
Java – why should you try to throw an unchecked exception on a checked exception?
See English answers > the case against checked exceptions 32 If I have this method title, two exceptions will be th…… -
Model view controller – questions about Java EE 6 architecture
>From the above figure, I can conclude that Java EE 6 architecture is a 3-tier architecture What I don't understand…… -
Java – Canny’s algorithm: lag error function
I'm writing Canny's algorithm. I seem to have a lag problem The threshold seems to be working, but my lag doesn't seem…… -
Java keystore and password settings
I have the following problems on Java keystores and keytool I assume that the keystore may have multiple certificates …… -
Java – why does overridepending transition not take effect when jumping from fragment to new activity?
The first activity contains a clip with a button inside. When I click this button, I want to jump to a new activity wi…… -
Java – base64encoder is an internal API and may be removed in future versions
See the English answer > how to avoid warning for the base 64? 2 code: public static String Encrypt(String Data) th…… -
Is the Java – quartz scheduler no longer applicable to spring since version 3.0?
Spring's internal scheduling function starts with spring 3, including support for cron type expressions, which is very…… -
Openid architecture for Java
I try to understand the concept and benefits of implementing openid in the project Moreover, since I am a java develop…… -
Java – set the list parameter to native query
I want to set the parameter to local query, javax.persistence.EntityManager.createNativeQuery Such a thing @ h_ 419_ 5…… -
Java – why Catalina home_ IS_ The undefined directory is generated by logback in the same project directory?
I wrote the logback configuration file for my application, but when I was doing Maven clean install (MVN clean install…… -
Java – you cannot use expressions to increment byte values, but use the increment operator
See English answers > why byte + = 1 compile, but byte = byte + 1 not? 8 byte i=0; i++; The following is invalid by…… -
ADO. Optimistic concurrency in net Entity Framework
I found that an MSDN article describes how EF handles concurrency when saving changes: I have two questions: >There…… -
Criteria – multiple expressions in the JPA querybuilder where clause do not work
I'm using javax persistence. criteria. Criteriabuilder encountered a problem creating the query I am using eclipse lin…… -
How to use java8 lambda expressions to throw exceptions for custom checks?
See English answers > java 8: lambda streams, filter by method with exception 13 private static void readStreamWith…… -
Java – the key in treemap returns null
So I have a very strange mistake When I first used keyset () to iterate over the first 10 keys of a large treemap, I s…… -
Migrate Jersey project to work in Jersey repackaged. org. objectweb. asm. Java. In classreader Java 10 result used in lang.illegalargumentexception
Previous projects run well on Tomcat 8 and JDK 8, but when I migrate my projects on Tomcat 9 and JDK 10, it gives the …… -
com. sun. JNA and net java. What is the difference between dev.jna?
I'm looking at the central Maven repository and looking at net java. Dev.jna and com sun. jna groupId for JNA. JNA's G…… -
Java recoverable hash calculation
I want to realize the recoverable instant hash generation of some files uploaded on the server The file is very large,…… -
Java video processing library
I want to extract frames from video and apply some filters on them, such as Gabor / Hough, etc Which Java library is p…… -
New constructor in xxxsummarystatistics java-10
I see that java-10 adds a constructor for intsummarystatistics (long summarystatistics and double summarystatistics), …… -
Java – spring MVC: should the service layer return dto specific operations?
In my spring MVC application, I use dto in the presentation layer to encapsulate the domain model in the service layer…… -
Using SDK to develop mobile phone (Java) or not?
Recently, I have to use java to develop mobile phones. I plan to develop on the following brands: NOKIA Samsung Sony E…… -
Java – validate HTTP requests from signed jars
I am writing a client for my web application, and I signed the release jar with my developer certificate. How can I ve…… -
Memory leak using tensorflow for Java
The following test code leaks memory: private static final float[] X = new float[]{1,2,3,4,5,6,7,8,9,1,0}; public voi…… -
JavaFX removable pane system
This is what I like. I've seen it in several different software I don't know its origin or actual call content, but he…… -
How do I use JNDI to pass parameters to an LDAP custom socket factory?
I am using JNDI to establish an LDAP connection Example: Hashtable env = new Hashtable(); env.put(Context.PROVIDER_URL…… -
Strange behavior of Java scanner reading files
Therefore, I encountered an interesting problem when using the scanner class to read content from a file Basically, I'…… -
Java – someone can explain spring security basepermission Create?
I'm developing a project involving spring security ACL, and I encountered creating permission basepermission CREATE. S…… -
Java – iterator of wildcard type variables with upper bound
Hello, I'm trying to extend HashMap < string, string > to enforce the "all lowercase" rule public class HttpQuer…… -
Java – create only one object for the class and reuse the same object
I want to create only one object of a class and reuse the same object over and over again How can I do this? Solution …… -
Java – if there is no code: is it just an intellectual challenge or is it useful?
A friend of mine is discussing these design techniques for object state transformation (he is a Java master, by the wa…… -
Emacs – Tuareg mode and CAML mode
I am currently using Tuareg mode, but I hope to be able to use the function of cam mode In particular, I want to be ab……