包含标签：Java 的文章
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Java – Eclipse: is there any way to force import in organize import to resolve ambiguity?
I use eclipse. Com on Android projects I updated to the lion, the problem began to appear... Try something for a few h…… -
How to write good Javadoc comments?
I am a java developer. I am interested in improving the quality of my Javadoc comments in the code and programs I writ…… -
java – NoSuchMethodError：org. slf4j. helpers. MessageFormatter. format
This error occurred while running my application: [ERROR] Apr 12,2013 10:18:56 AM com.google.appengine.tools.developme…… -
Java – how to insert batch generated keys from JDBC into oracle?
I use JDBC to batch insert many records I'm using Oracle jdbc. OracleDriver final String insert = "Insert into Student…… -
Java – why does hashcode () return the same value for an object in all successive executions?
I try some code about object equality in Java As I read somewhere Now I have a sample program that I run 10 times in a…… -
Java – @ before method in testrule is not called
I implemented a JUnit 4 testrule (extending an externalresource) and injected it into my test class as a @ classrule: …… -
Java – how to reduce short circuit on stream?
Suppose I have a Boolean stream and the reduce operation I write is 𞓜 (or) Can I write in such a way that if I encount…… -
Java – how to map maps
I tried @ManyToMany(cascade = CascadeType.ALL) Map<String,Double> data = new HashMap<String,Double>(); But…… -
Introduction to Java graphics library
I have just entered information visualization and scientific visualization and have used Piccolo and some with JfreeCh…… -
Java – CPU usage and object wait
I use jpprofiler to analyze my application, so in the "CPU view" section, it shows that more than 40% of CPU time is s…… -
What is the best way to deal with low memory in Java?
We have an application that generates a new JVM and executes code on behalf of our users Sometimes, there is not enoug…… -
Javafx2 – poor performance when dynamically adding custom (fxml) panels to grid boards
problem My attempt I tried to expand from the pane public class Celli extends Pane{ public Celli() throws IOExcept…… -
Java – should the constructor of a private inner class be declared public or private?
Is there any practical difference public class OuterClass { private class InnerClass { public InnerClass()…… -
Java – what does “container” mean in the context of programming?
I'm learning spring. The term "spring container" often appears in this article However, I know that "container" is not…… -
1 field of multiple regex @ patterns?
I tried to apply multiple @ pattern annotations to a single field: @Pattern(regexp = "(?=.*[0-9])",message = "Password…… -
Java wrong time zone
I have an instance of Java that seems to use a completely incorrect time zone Instead of using the Australia / Sydney …… -
Pop up and start JPA2 hibernate – enable L2 cache
I use spring boot 1.2 5 and JPA 2 annotation entities (and Hibernate as the underlying JPA Implementation) I want to u…… -
How to display images in Java applications
I want to display an image in my java application I found a code that downloads images from web server and displays th…… -
Java immutable classes are much slower
I need some complex math libraries, so I hesitate to use immutable complex libraries and variable complex libraries Ob…… -
Java – empty array is an empty list
Arrays. Aslist (E [] e) returns the view of the array as a list, but it throws a NullPointerException when the array i…… -
Java – templates in spring MVC web applications
I have many common areas in my web application design, such as footnote, title, sidebar, block... And change some thin…… -
Java – example implementation of httpservletrequestwrapper, setreadlistener / isfinished / isready?
I try to adjust an httpservletrequestwrapper (see how to read InputStream multiple times) so that the HTTP post body c…… -
Java – what is digital promotion?
Can anyone tell me what digital promotion is? Solution Number promotion is to convert a smaller number type to a large…… -
Java – how do I retrieve the size of a file from a URL download (using an HTTP connection)?
I am using a project to download files using an HTTP connection I display a horizontal progress bar with progress bar …… -
Java – soap WS – make @ webparam optional
I have a very simple method. I use jax-ws annotation in WS API: @WebMethod public MyResponse sendSingle2( @WebPara…… -
Java – @ AspectJ cuts into all methods in the package
I have this working code for a specific package, but I want to configure it for all controllers, services and Dao pack…… -
Java – spring boot: persistence cannot be used
I've entered this stage, and - although I'm learning a lot - I'm starting to despair I've tried all the suggestions on…… -
Prepared declarations collected in the in clause of the datastex Cassandra CQL driver
I am trying to run the following query SELECT edge_id,b_id FROM booking_by_edge WHERE edge_id IN ? I bind Long's Java …… -
Why does the same code work differently in Java?
I wrote the following code in Java and C, but the output of these programs is different Can you describe it This is ja…… -
Libgdx collision detection with tiledmap
I'm trying to implement a collision detection system by tiling maps I have a 2D Pokemon style game with a tiled map Sp…… -
Java – custom string class creation
I tried to use Java. Net in my eclipse workspace Lang package to create a custom class string Now I'm confused 1) why …… -
Java – dagger 2
Using dagger 2, I tried to inject singleton objects at multiple locations within a single range However, it seems that……