Java
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Java – round to 2 decimal places
(Math.round(doubleValue*100))/100.0 (Math.round(doubleValue*100))/100.0 Is there a better way to round the decimal to …… -
Java – what is imageobserver?
When you draw an image, you need an image observer New comments new new new flag new new new flag new new flag new fla…… -
Java – Lucene index problem with “–” character
I came across a Lucene index that indexes words with "–" characters It applies to some words that contain "–" but not …… -
JPA: what is the behavior of merging with lazy initialization sets?
The following is the sequence that caused the problem: >I have a team record and 3 player records in the database T…… -
Java – sort double values in JTable
I found many problems related to this, but I didn't find a simple way to solve my problem I can't find a way to make m…… -
Threshold image using OpenCV (Java)
I'm working on a project with OpenCV I need to convert the following image to a threshold image I tried this function:…… -
Java – how to comment that all lines contain some text in eclipse
I'm using eclipse to cook Java Now, when I want to comment on all lines containing specific text / variables, I have e…… -
Java XML schema validation: prefix unbound
I have followed this tutorial to validate XML files However, an exception was received while validating the XML file W…… -
Register a Microsoft authentication service certificate for a user from a java program
With microsft certificate services, users can register / create their own certificates How do I create this certificat…… -
Java – Find Unused public members in eclipse
I have a class with 1600 public static members I have to find and delete unused Is there any way to do it in eclipse S…… -
Java – spring MVC passes a list of values from the JSP page to the controller
If I have HTML in < form >, like this: <input type="text" value="someValue1" name="myValues"/> <inp…… -
Java – friends list of friends who use twitter4j
How can I use twitter4j to get a friend list of friends or fans? Using getfriendsid (), I can only retrieve the list o…… -
Java – serialize POJOs using gson
I use gson to serialize POJOs – objects before and after changes The changed (called a) set by struts 2 can be easily …… -
How do I turn the monitor on and off in a Java application?
How do I turn the monitor on and off in a Java application? If you want to know why, this is a self-service terminal s…… -
Java – how to bind two parameters using play 2.0 routing
I'm learning play 2.0 (using the Java API) and want to have a double / float parameter (location coordinates), like ht…… -
Using multiple SSL client certificates with the same host in Java
In my java application, I need to use SSL to connect to the same host, but I use a different certificate every time Th…… -
Java – is there any way to create a basic array without initialization?
As we know, Java always initializes arrays at creation time That is, new int [1000000] always returns an array with al…… -
How can the Java – @ Autowired annotation be used for private fields?
See English answers > what is reflection and why is it useful? 21 Solution It applies to reflection Here you can fi…… -
Java – does any program recognize that it crashed last time?
What is the best way to let the (Java) program recognize the crash when it was last run, and display a message "it loo…… -
Java – is it acceptable to use the hamcrest matcher in non test code
I tried to find a clear answer to using hamcrest matchers in non - Test code I have done some research and have some c…… -
Java – what is the reason for the failure: “jarsigner: failed to try to rename {file} to {file}. Org” sign up with ants?
I received an error: When trying to sign a set of cans with ants in eclipse Ant build works well in this project and h…… -
Multithreading – prevents / removes threads from publishing messages to the main UI thread
My problem is that if a thread quickly publishes messages to the main UI thread, and if I update the UI at that time, …… -
Java n-dimensional array
I need to be able to have an n-dimensional field, where n is the input based on the constructor But I'm not even sure …… -
Java – spring MVC: Form: RadioButton of Boolean attribute
I just want to know how to use Boolean values in spring MVC forms I try to use this Code: My jsp: <form:radiobutton…… -
Concurrency – can a single process run in multiple cores?
Can a single process run different threads on different cores? (I think they can) @ h_ 301_ 3@ In this case, different…… -
Use the latest JRE instead of the old java version. Can I guarantee that it will work?
Suppose I have a java project encoded in Java 1.5. I use a newer version of Java, but set the target to 1.5 If the cod…… -
Java – find the largest connected component in the adj matrix graph?
I try to find a way to find the largest connected component in adj matrix graph For example: 0000000110 0001100000 000…… -
Parallel for loop
I want to use the go routine to parallelize the for loop I tried to use the channel, but it didn't work My main proble…… -
Java – multiple object types in an ArrayList
I have an abstract class named user, which can be created as student type or teacher type I have created an ArrayList …… -
Java – do you know what this error means in SVN?
Send example java I try to restore my changes and then even add only one additional character, and I'll see this error…… -
How to create mongodb objectid in Java
How to add an array to a mongodb document using Java? after { "_id" : ObjectId("5399aba6e4b0ae375bfdca88"),"addressDe…… -
Java – how to work comfortably in large (Android) projects?
I created an app for Android some time ago and uploaded it to Google play I'm happy because users like my application ……