Java
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Java – cannot set setvisibility() parameter dynamically
I am setting the visibility of a button as follows: public Bundle setActivityState(Bundle bundle){ startBtn = (But…… -
java – Scala：String“”vs“”
I am a newcomer to scala. I have seen the code for connecting strings in Scala, as shown below: "test " ++ "1" And I'v…… -
Using zxing to read QRcode in Java
Some questions about using zxing I write the following code to read the barcode from the image: public class BarCodeDe…… -
Setting the file creation timestamp in Java
I know that setting the creation timestamp does not exist in Java because Linux does not, but is there any way to set …… -
Java – how to send cookies with selenium webdriver?
Every time I run my test, the first step is to log in, not I get to the page If you run this test, the login operation…… -
Java – JSF CDI: dialog scope bean [S] best practices
I am currently learning JSF 2.0 and am very happy with the existence of this session scope function, which is very use…… -
Where to place I18N key strings in Java
When Internationalizing in Java, you can assign a string key to each message What are best practices and where to plac…… -
Java – how to generate JList with alternating colors
How do I get an alternate color JList in Java? Any sample code? Solution To customize the appearance of JList cells, y…… -
If a host is lost, the datastex Java driver will not connect
If I am not wrong, I can connect to a Cassandra cluster, know that there is at least one node in the cluster, and then…… -
Java – how to get the depth of the current node in JTree?
I have a JTree with several nodes and children When I click on a node, I want to know its depth (0,1,3) How should I k…… -
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 – MVN jetty: running failed to find my loginservice
I set up a dock security domain as follows (for MVN jetty: run) POM xml <plugin> <groupId>org.mortbay.…… -
Put the object into Java util. In properties
I'm trying to understand why I implemented Java util. Properties. It has two interfaces: getproperty / setproperty, wh…… -
How to make the java desktop application of the installer multi platform?
How do we make a jar file installer that can run on multiple platforms Is there any simple way because I don't know mu…… -
Java – how do I get all the files indexed by Lucene?
I created a Lucene index I want to get all the files, just sort according to the fields, no search criteria! Solution …… -
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 ……