Java
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How to use gridpane JavaFX to make buttons span multiple columns / rows?
I am new to JavaFX and am trying to use gridpane for simple button design I can't figure out how to make buttons span …… -
Java – empty all field swings at once
I have a JPanel with many jtextfields and JCombo@R_779_2419 @Es and jradiobuttons, so I want them to be in the default…… -
Java – left to right evaluation of expression and operator priority Why does the left to right assessment seem to win?
Consider the following codes: public class Incrdecr { static int x = 3; static int y = ++x * 5 / x-- + --x; public s…… -
Group object lists and count them using java collections
Which Java collection class better groups object lists? I have a list of messages from the following users: aaa hi bbb…… -
How to programmatically trigger mouse events in JavaFX?
The following code shows two panels, yellow and blue, where blue is the child of yellow If I click the center of the b…… -
Java inheritance and method parsing order
I have the following code example: class p { public void druckauftrag() { // ... drucke(); } …… -
Java – prevent jsup. Java Parse delete end tag
I'm using jsup Parse parses a piece of HTML Everything else is great, but I should parse this HTML later in the PDF co…… -
Java – why UUID Will the initial call to randomuuid () slow down?
Given the following code snippet, it generates a UUID Randomuuid(), I get the following performance results (in millis…… -
java – Android. Search and filter in recyclerview
Translate using "Google translate"! Briefly describe the problem I decided to try recyclerview There is no need to imp…… -
Java – how to convert an object to an enumeration to use it in a switch statement
Using java 8, I have a map. I need to convert it to another map to replace the key name and sometimes the value For ex…… -
Java – get the month name of a specific date range
I have a date range '2015 / 01 / 01' to '2015 / 12 / 31' From this date range, I want to display the unique device of …… -
Java – Best Practices for passing parameters
Suppose I have an application class with about 10 fields In other utility classes, I have one of the following two met…… -
Java – use variable class names instead of many if clauses?
I'm trapped now. I don't know it's easier to solve this problem. Maybe you can help me I have an interface called anim…… -
Java 8: extracting sub streams from streams
I have an object stream from which I need to extract a stream with only some object properties For example, from strea…… -
Java – use mockmvc to get the HttpServletRequest attribute
I have a very simple controller defined in this way: @RequestMapping(value = "/api/test",method = RequestMethod.GET,pr…… -
How to replace the occurrence of the nth character in a string?
I need to replace all commas after the fifth Therefore, if a string contains 10 commas, I want to leave only the first…… -
The Java – H2 console and spring security – permitall() do not work properly
I'm creating a rest API and implementing spring security – everything is fine, but I want (now, when I'm still develop…… -
java – Mono. AndroidTools. Installfailedexception: failed
I encountered this problem and my application will not compile I tried to use the playback service in my application, …… -
Java – dumptreshold does not work properly
I use Jax - WS RI to exchange soap XML with other services at org.apache.cxf.transport.servlet.ServletController.invok…… -
Java, symbol error not found?
I tried to calculate the total price of unit price 17 and the quantity of goods 20 public class hw1_task3 { public…… -
Java – avoid isinstance statements
How can I refactor this example to avoid the need to check isinstance in each data type? Can I follow any pattern? pub…… -
Why does this code snippet not have runtime errors as described in the Java tutorials documentation?
public class @R_150_2419@ { public class @R_150_2419@ { private Object object; public void set(Object object)…… -
Java – what is the syntax for creating serializable groovy classes for Jenkins workflows / pipes
When using Jenkins workflow groovy, I encountered a serialization error while trying to create an object for a dead si…… -
Vector – clojure – define a data structure for a person
In other languages, how to create structures is very self - evident How would you do such a thing in clojure? For exam…… -
Java – why does jasperreports try to load org. Org springframework. core. io. Resource class?
Recently, we integrated Jasper reports into our enterprise applications Some of our users get Java. Com on the client …… -
Java – how to add metadata to PDF documents using pdfbox?
I have an input stream of PDF documents for me to use I want to add the topic metadata to the document and save it I d…… -
Java – spring stomp over websocket: message / buffer / cache / stream limit
I can't understand my different parameters in the websocket configuration for developing chat applications involving i…… -
Java – why can’t the final variable be used in a switch statement?
When I type the following code in eclipse, it complains that "case expressions must be constant expressions." If the a…… -
How can I avoid doing a lot of if in Java?
In C, I will use the mapping of int / pointer to implement such a function: @ h_ 404_ 7@ std::map = { {Code::Value1,Ha…… -
Java – streams: how maps in streams work
In order to better understand the map function in streams, I tried this: String inputString="1+3+5"; Stream.of(inputSt…… -
Java – Android studio does not parse classes written in kotlin (. KT) in the IDE, but compiles well
I started working on an existing project that uses standard Java and some classes of kotlin Question: These projects c…… -
Java 8 optional how to handle too many orelses
Let's look at an example without Lambdas: @H_ 502_ 8@ @H_ 502_ 8@ Credentials credentials = CredentialService.get(id);……