Java
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Java – how to merge a single selected PDF file into one PDF when downloading?
How do I merge a single selected PDF file into one PDF when downloading? I want to achieve the following goals: http:/…… -
MacOS – clojure dependency for Java 1.5 only?
I hope this is not the subject of so (I hesitate between so and programmers. Stackexchange), but as far as I know, thi…… -
How do I know if a Java se class or method is thread safe?
For example: static private DateFormat df = new SimpleDateFormat(); public static void format(final Date date){ fo…… -
What is the best way to learn security in Java A-Z
I am a J2SE / Jee developer, a novice in Java security, and plan to learn more about this topic You can help me guide …… -
Variable declaration in Java – if clause
if(someCondition) if(someCondition) int a=10;//Compilation Error else if(SomeOtherCondition){ int b=10;//no compilat…… -
Extract flow graph from Java stream >
I have a stream (this format is not set by me and cannot be changed) for example Stream<String> doc1 = Stream.of…… -
JavaFX – how does cellvaluefactory() and cellfactory() work? What’s the difference between them?
I want to know about these methods cellvaluefactory(); And cellfactory(); When will it be called? What is their purpos…… -
Java – what does the @ modelattribute annotation at the method parameter level mean?
The spring 3 reference tells us: I don't understand this magic spell because I'm sure that the alias of the model obje…… -
Java – wait for the third-party thread to complete
I have a thread running a third-party library, which will also run its own thread When the run method of my thread com…… -
Java – download files using asynctask
I tried to download a file with asynctask, but it didn't work, no error message or nothing, just didn't download the f…… -
Java – weak reference instead of getactivity () (Android avoids memory leakage)?
In order to avoid memory leakage, I wrote the following method, which will be used for activities, mainly for fragment…… -
Java – SQL prepared statement for creating tables
I want to know some methods of dynamically creating tables based on user input (SQL prepared statement) CREATE TABLE ?…… -
java – JAXBElement vs boolean
What exactly is a jaxbelement Boolean value and how to set it to Boolean equivalent to "true"? method: public void set…… -
Java – use pdfbox 1.8 8 visual signature
I'm trying to use visual signatures and pdf@R_486_2419 @Make PDF I have two streams, it seems pdf@R_486_2419 @Only fil…… -
Java – the spring boot rest controller returns 404 when deployed on an external Tomcat 9 server
I have a spring boot rest web application that runs perfectly on an embedded server However, in accordance with the bl…… -
“Cannot reproduce” – is java deterministic multithreading possible?
Can this run multithreaded Java applications in a deterministic manner? I mean, always use the same thread switch in t…… -
What types of encryption are available in Java?
I am implementing the data transfer model in Java I have implemented DES, 3DES and AES in my application. I would like…… -
Returns c# the dictionary in a multithreaded environment
I have announced a dictionary of dictionaries: Dictionary<String,Dictionary<String,String>> values; I have…… -
How to write large byte ByteBuffer to small byte in Java
I currently have a Java ByteBuffer, which already has data in big endian format Then I want to write a binary file as …… -
How to use java to calculate the number of options in the selection drop-down box in selenium webdriver?
I have a selection drop-down list: xpath //*[@id="ddlTablePay"] I need to calculate the number of options in this drop…… -
JavaFX CSS error (attribute style sheet does not exist)
I've just started building JavaFX applications in IntelliJ using the latest Java 7 SDK I have built my interface using…… -
Java – allows you to provide maps for equals comparator and hash functions, respectively
When trying to model polynomials, especially their multiplication, I encountered the following problems During multipl…… -
Flickr API JAVA – flickrj
I want to use Flickr Java API (flickrj) to download a group of photos of specific users in Flickr Does anyone know how…… -
Help use Horner’s rules and hash functions in Java?
I'm trying to convert words to integers using Horner's rules I understand how it works. If the word is long, it may ca…… -
Java import class system
I have a question about class import. If you import a class, you seem to be able to call a method with a reduced line …… -
Java – how to add a gap at the edge of a JButton?
I want to keep the default borders on my jbuttons, but also put a blank area around them I'm using vertical @ r_ 518_ …… -
Java – find the next occurrence of the day of the week in jsr-310
Given a jsr-310 object, such as localdate, how can I find the date of the next Wednesday (or any other day of the week…… -
Filtering lists using java 8 lambda expressions
I have a project class: class Project { List<Name> names; int year; public List<Name> getNames…… -
Java – monitoring dbcp2 connection pools using JMX
I read from the dbcp2 documentation that this new version supports JMX monitoring of connection pools, but I can't fin…… -
Java – use another list to sort the list
Can the Java collections sorting method be used with a comparator because it sorts one list to sort another by the ind…… -
Java 8: why does the functional interface in Java 8 have an abstract method?
As we know in Java 8, new concepts and functional interfaces are introduced The function interface has an abstract met…… -
Java – displays JPA SQL statements when using play framework 2
I am developing a web application using play framework and JPA / hibernate For debugging purposes, I'm glad to see the……