包含标签：Java 的文章
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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);…… -
Java – Click to confirm the modal dialog with selenium webdriver
I have a modal dialog like this: I want to click OK to save this text So I use switchto switch to this dialog box: web…… -
Java – render Android support. design. widget. Coordinatorlayout problem
I upgraded Android studio to 2.2 Problems faced after 3 I tried to fix the build path, but it didn't work for me When …… -
Java spark streaming JSON parsing
I have started to learn spark flow from spark engine, and new data analysis and spark I just want to create a small IO…… -
Java – TestNG – @ aftermethod priority
Can the @ aftermethod method method be called in a specific order? public class PriorityTest { @BeforeClass(alwaysRun…… -
Java – how do I reverse the seekbar value?
I have the following code: int min = 1; int max = 255; seekBar.setMax(max - min); seekBar.setOnSeekBarchangelistener…… -
Accessing poloniex HTTP API using java
I tried to connect to poloniex com API https://poloniex.com/support/api/ , which says: But I always get {"error":"Inva…… -
BufferedReader in Java Does readline() put the entire file in memory?
Yes? Or maybe only a single string is placed on each readLine (), and the maximum memory space is the volume of the lo…… -
JavaFX drop-down button
How to create a "drop-down button" in JavaFX? So far, I'm using it Choice@R_206_2419 @, now I have to Choice@R_206_241…… -
Java – static nested subclasses of closed types can still reference private field members. Why?
I've found something vague. With all due respect Suppose we have the following class structure: public class A { p…… -
Java – place numbers on random points in a 2D array
I have a 2D array with 5 rows and 5 columns I want it to place a '1' character at 8 random points in the 2D array (mak…… -
Java – if value is empty, delete the key
Suppose we have a map < key, collection < value > > mymap and a method to delete values from the collectio……