Java
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Java – which length is the string key of a HashMap that is considered a bad habit?
I always pay attention to good performance and clean code I tried to grasp whether it was reasonable to have a HashMap…… -
Java: interface vs abstract class (about fields)
From the content I collected, I want to force a class to use specific private fields (and methods). I need an abstract…… -
Java – using Apache velocity and spring framework 3.2 four
I'm new to spring. I want to use velocity to set it up Therefore, I created a new spring project, a new spring MVC pro…… -
Java – this: cannot be used in a static context
Can you help me with the following code? The error is: "cannot be used in static context" public class Sample2 { /…… -
Java – eclipse command line parameters
I know how to run my application using the run configuration menu and command line parameters My problem is that wheth…… -
Solution to the problem of Chinese garbled code in Java compressed zip file
Usually, after using java to package files to generate compressed files, there are two places where there will be garb…… -
Java – record JSON requests and responses for JSON
I have a Java Web application that exposes restful APIs My requirement is to record all JSON requests and responses pr…… -
Java – use spring boot actuator without spring boot application
The actor Library of spring boot with production information endpoints is very useful for any server application But t…… -
Java – use JNA to get getforegroundwindow();
I once asked a similar question（ https://stackoverflow.com/questions/5206633/java-find-out-what-application-window-is…… -
Java multithreading: unexpected results
I am developing an enterprise application I encountered some problems running applications in a multithreaded environm…… -
Java – using welding and dropwizard
I tried to use weld se for dependency injection in the dropwizard application I can boot weld and inject it into the a…… -
Java – wierd syntax – underline between numbers
See English answers > java 7 underscore in numeric literals8 int _ = 8; System.out.println(5_5); The question is "w…… -
Java – where does JIT compiled code reside?
So I have this method written in Java: public void myMethod(int y){ int x = 5 + y; doSomething(x); } And suppo…… -
Java – enumeration is null
I am developing a LALG compiler to my college course Java 1.6 So I made a type class and grammar class EnumTypes publi…… -
Java – the xmlstreamreader does not close the open XML file
To use xmlstreamreader, I'm initializing it like – XMLInputFactory f = XMLInputFactory.newInstance(); XMLStreamReader …… -
Check whether the resultset in Java is empty
See English answers > java resultset how to check if there are any results21 //check if empty first if(results.next…… -
Does Java sync update the full cache, or only my synchronized objects?
If I access objects in a synchronization method or synchronization block, are all objects in the accessed element sync…… -
java – Hibernate – hibernate. hbm2ddl. auto = validate
I'm interested in hibernate hbm2ddl. Auto = interested in the actual work of verification, I am trying to find compreh…… -
Effectively find unique vector elements in the list
I have a list of numeric vectors. I need to create a list that contains only one copy of each vector There is no list …… -
Java – findbugs and Google codepro Analytix (Eclipse Plug-in)
I've used Google codepro Analytix, but I've never used findbugs Findbugs' first impression is that configuration is mo…… -
Java – benefit from getters and setters generated in play! skeleton
Play for each public farm of the runtime model class! framework generates getters and setters. public class Product { …… -
Java – determines if the file is duplicated
Is there a reliable way to determine whether the two files are the same? For example, two files of the same size and t…… -
Does Java – spring AOP compile time weaving or load time weaving?
I started using spring AOP for projects, and I was a little confused about weaving I know that spring AOP relies on as…… -
Java – how to see an array in Android’s logcat
I want to record arrays in my logcat, such as arrays, so I know what the output is File[] mp3List = ... Log.v("test",m…… -
Java optimized string and character array
In my program, I'm doing a lot of string operations I'm trying to improve performance and wonder if using char arrays …… -
Java soap request – read soap response
I am trying to get the specific value in the response from WebService Unfortunately, I don't know what to do. I use th…… -
Java – how do I start Jfilechooser in the details view?
I want my Jfilechooser to start with the details view instead of the list view it starts with How do you do it? Soluti…… -
Java – guava charmatcher static initialization slow
Update: looks like my 13.0 1 is the calling code from this diffed charmatcher http://code.google.com/p/guava-libraries…… -
Why is this code not compiled in javac, but there are no errors in eclipse?
The following codes: @Retention(RetentionPolicy.RUNTIME) @Target( { ElementType.METHOD,ElementType.FIELD,ElementType.A…… -
Java – how to subclass the general ArrayList so that the instance of myarraylist will become a subclass of ArrayList?
I want to keep my subclass generic. All I want to change is the add (object) method of ArrayList to call ArrayList Add…… -
Convert Java bytecode to other presentation and programming languages
I am looking for ways / tools / projects to convert Java bytecode to other programming languages, or at least in struc…… -
Java – spring data findfirstby throws correctresultsizedataaccessexception?
I want to use SQL SELECT. XML with method name in spring data The selection should be sorted by price @Entity public c……