Java
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Java – use custom accountauthenticator with multiple applications
I have two independent Android projects. One is the implementation of abstractaccountauthenticator for managing user a…… -
Java – can I expire all user sessions?
Can I expire all user sessions? I'm using tomcat, servlet / JSP In the session, I have a property userid On this basis…… -
Java – vaadin create modal dialog window
How to in vaadin 7 Create modal dialog window in X? I have found that I have a main window and added it to my new dial…… -
Get the range of values from the map in Java
Is it possible to get values that match a series of keys in a Java map Suppose I did, Map<Key,Value> //size 10,0…… -
Java date format is mmddhhmmss
I want to add a date to the file to maintain the archive So the file name is "cgroup0307131614", but I want to add a t…… -
Java 7 try with resources (autocolosable) implementation
My question is more about the type than how I know that there are the following jobs in Java 7: try ( File…… -
Java – redraws jpanels with different images each time you click
I'm still a novice in Java. I have the following questions public class Level { JPanel panel String img1Path = "im…… -
When specifying types, javac “uses unchecked or unsafe operations”
The following codes: public void addGrillaListener(Stage stageToClose,Grilla listener) { GrillaHandler<WindowEv…… -
Best practice – how do I test for strings in Java?
I render some data according to conditions Support method execution to check whether the string exists But I don't kno…… -
Socket programming between Java and TCL
I have to write a program for a scenario in which a java program will communicate with a TCL program using socket prog…… -
Java – rotate the image in the override paintcomponent (…) method
I just want to know how to use the paintcomponent () method of jlabel component to rotate the rectangular image and se…… -
JavaFX: drawing on ImageView with mouse
Use the mouse in ImageView I don't know any method of drawing on, such as using canvas? Solution My coming here is a g…… -
Vectorization insert element
I wrote an R function to insert a given element E at a given position P of vector v Here is: insert <- function(v,e…… -
Java JXL exception with largest row
I am creating an excel table from my vector, which contains 127923 records. When I try to enter records, I will encoun…… -
Boundaries in java games, how do “professionals” do this?
How do professionals make boundaries in 2D games? My way is to say that I don't want elves to enter an area: //Example…… -
Sort alphanumeric string Java
I have this array to store the suffixes of some URLs added by the user: [U2,U3,U1,U5,U8,U4,U7,U6] When I do this: for …… -
Synchronous multithreading in Java
I teach myself Java. I want to know about multithreading I created the myThread class, whose job executes a loop until…… -
Java – no suitable driver Try using hibernate to connect to the PostgreSQL database on heroku
I'm sorry to bother you, but I've been receiving errors. I don't understand why As specified in the title, I'm trying …… -
Java – how does null work in this code?
See English answers > method overloading and choosing the most specific type 9 class Test1{ public void doStuff…… -
Java – need ideas on how to insert small text phrases on the panel
I tried to insert the "puzzle game" text circled in red in the attached image I have put all four blue buttons and tex…… -
Java – ArrayList of arrays, how to make the size of the last array different from other arrays in the list
Explain what I want to achieve: I get a file. I have to read data from the file and create a block with a size of 1 KB…… -
Java – does a lot of annotated code affect the size of class files?
I have a code that I no longer need This is about 1000 lines So I just want to know if keeping this code in my java fi…… -
How to use private Java classes for effective API design
I am writing my first "API jar", which will be an open source library and used by (possibly) other developers I read J…… -
Set the “user agent” parameter for urlconnection to query Google from Java applications
I tried to get the results from the Java query as follows: String urlquery = "https://www.google.com/search?hl=en&…… -
Java – replaceall boundaries and exceptions
I'm trying to use replaceall to eliminate all spaces in the string, except two areas If my string is AB CD #E F# #…… -
Are there any problems when the project has different versions of the java compiler?
I have an eclipse workspace with several Java projects (in Maven); These are interdependent Recently, I started to cha…… -
Java: a neat mysterious veil
I have a list of filled integers: List collection = new ArrayList(); collection.add(this.score1); collection.add(this.…… -
Java – sort a two-dimensional array based on a row of data
I'm not sure whether the title correctly indicates the question I want to ask Suppose I have a two-dimensional int arr…… -
Java – Hibernate: two onetomany attributes mapped by the same entity with different columns
I know this can be easily solved through HQL query, but I prefer hibernate to handle some onetomany attributes for me …… -
How do I distinguish between two pending change lists in perforce?
I have several similar pending change lists, based on the top of the code branch and the same workspace in perforce I …… -
Java – MVC architecture for working with servlets
So, yes, that's my understanding >Servlet is just an intermediary, which is responsible for finding out the meaning……