Recent Posts
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Java – error reading type of elexception
When I showed my JSP page and tried to call a defined getCurrentlocation () function in the Person type, I received an…… -
Java – Jersey 2.7 has problems running on Apache Tomcat 7.0
I am using Apache Tomcat 7.0 and eclipse to create a sweatshirt application import javax.ws.rs.GET; import javax.ws.rs…… -
Java – why are private fields on enumeration types visible to containing classes?
public class Parent { public class Parent { public enum ChildType { FIRST_CHILD("I am the first."),SECON…… -
Opencv – how to interpolate between data points?
I am developing a software using OpenCV and QT to draw data points I need images that can fill in incomplete data I wa…… -
Java – why string Indexof does not use exceptions, but returns – 1 when no substring is found?
Why string Indexof does not use exceptions, but returns - 1 if no substring is found? The purpose of this problem is: …… -
Java – generic image loader: bad bitmap attached to ImageView
I've been evaluating Nostra's universal image loader library to asynchronously download images and display them in lis…… -
Java – the keyword “class” is in the declaration
I was faced with a rather simple question in the interview Why do we use the class keyword to declare classes? Solutio…… -
Make the Java program return value to call the shell script
UNIX master! I have a java program that passes some parameters to a servlet The servlet inputs the information into a …… -
Java regex: matches (pattern, value) returns true, but group () cannot match
I have a strange problem with regular expressions in Java I tested my regular expression and my value here, how it wor…… -
Java – file path / name from InputStream
How do I get the file path / name from InputStream in Java? Solution It's impossible. (not FileInputStream in Java API…… -
Java – I need to know how Haskell represents data and can write a good Haskell program?
I'm learning Haskell from a Java background When I program java, I think I know very well how objects are arranged in …… -
Enable MySQL general query log using JDBC
Is there any way to enable MySQL general query records through JDBC? The closest thing I found through my search was t…… -
Java – transformation 2.0b2: how to get InputStream from response?
I'm using retrofit 2.0b2 After getting the response, I try to get an InputStream from the response: Response<JsonNo…… -
Java – how to: access restful web services for beginners using play framework 2.1
Many concepts and techniques I use in this problem are quite new, so I hope to know and help beginners in the communit…… -
How should I name my java 9 module?
Suppose I have a libraryid = org ABC and artifactid = libraries of MyLibrary The recommended name for the module name …… -
The name of parameter binding cannot be null or empty! For named parameters, you need to use @ param to query method parameters on the Java version
This is over, but my problem is different This is a problematic jpql query: @Query("SELECT NEW com.htd.domain.ShopOrde…… -
Java – singleton mode
Recently, I asked questions about Java in an interview with the following code. Because I just started using Java and …… -
java. Lang.illegalaccesserror: attempt to access field concreteentity. From class entity instance
OK, so here's the deal I'm trying to access concreteentity Instance, which is the default field of the access type exi…… -
Java – set the default value to a variable when deserializing with gson
I'm trying to convert JSON to Java objects When a value of a pair is empty, some default values should be set This is …… -
Java – multithreaded gae servlet to handle concurrent users
I want to multithread my gae servlet so that the same servlet on the same instance can process up to 10 concurrent req…… -
Java antivirus… Is it possible? What about?
Can I write anti-virus programs in Java, for example, can I intercept the execution of programs? Can I have such deep …… -
Java – a design pattern that transforms one model into another
Basically, there are some objects in my application that I have to convert to another third-party object before sendin…… -
Java – logback file error: [rollingpolicy] has no applicable operation. The current mode is [[configuration] [appender] [rollingpolicy]]
I am using login akka to write the log to the file. Everything is good until my log file stops writing the log. Maybe …… -
Java – how to get a class literal from a general specific class
Such a method requires class text as a parameter Collection<EmpInfo> emps = SomesqlUtil.select( EmpInfo.…… -
Java – JTable – press tab to put the cell into edit mode
There may be a trivial solution, but I'm already at the end of my tether, so I hope someone can help I use a JTable wi…… -
SIGTERM is not received by the java process using ‘docker stop’ and the official JAVA image
I use Debian / Jessie based image Java: 7u79 to run the dropwizard Java application in the docker container My java ap…… -
Java: use decimalformat to format doubles and integers, but keep integers without decimal separator
I tried to format some numbers in a java program Numbers will be double and integer When dealing with double precision…… -
Java – what is the purpose of using final for loop variables in an enhanced for loop?
I understand how the following statement works for(final Animal animal : animalList){ //do some function } But what is…… -
Java – Jersey rest server: instantiating resource classes
The tutorial on Jersey rest server [1] said to Jersey small server: When the servlet "selects the correct class and me…… -
Java – Eclipse console exception color
This seems simple, but I can't seem to find a setting in eclipse to change it I like my console with dark white text I…… -
Java EE replaces Scala?
Many Java x Scala comparisons seem to focus only on languages (syntax, collection APIs, actors, etc.), but what about …… -
Java – Android: how to set the default value of parameter variables
Android features PHP example: Function haha ($a = "test") {print $a;} The question is how to do it in Android public v……