包含标签：Java 的文章
-
Java – optimal time complexity of string reverse operation: O (n) or O (n / 2)?
The following is a snippet of string inversion private static String reverseString(String originalString){ char arr[]=…… -
Java – when to call getwarnings() on connections, statements, and resultset using JDBC?
In JDBC, connection, statement and resultset types all have getwarnings () method, which is specified to generate the …… -
How to use java to get all text files from a folder?
I need to read all ". TXT" files from the folder (the user needs to select this folder) Please tell me how to do it? S…… -
Java – how to dynamically change jlabel
I have a jlabel and a button. Jlabel displays the number of button presses, but I can't calculate how to update the jl…… -
If there is no system Out, what about printing on the console?
I recently encountered a problem in an interview The problem statement is – > assuming that you cannot access the s…… -
Java sliding jpanels
I have a menu showing various buttons. I can make the buttons call their respective jpanels when clicked The thing is …… -
How to centralize JavaFX controls
More specifically, why is my JavaFX control not centered? Here are two screenshots. The first one is after the beginni…… -
Java – writing files in clojure
I am using this function to write files in clojure (defn writelines [file-path lines] (with-open [wtr (clojure.java.…… -
Java NiO – memory mapped file
I recently encountered this article, which provides a good introduction to memory mapping files and how it is shared b…… -
How to convert float to double in Java?
See English answers > why converting from float to double changes the value? 9 public class DataTypes { static…… -
Java JDBC：Reply. fill()
I sometimes get the following exceptions: The problem is that the code executes successfully for a period of time, and…… -
Transform “Java. Net. Protocolexception: unexpected status line”, anyone?
My Android application crashed the following stack trace, but it worked well when I tried it from the desktop rest cli…… -
Make these balls bounce through Java collection iteration, any tips?
If the problem is not clear, but I can't think of another way to express it, I apologize This is my homework for worki…… -
Java – nonlocking IO vs blocking IO raw data throughput
There is a statement in Apache httpcomponent document: Really? Can anyone explain it in more detail? What is a typical…… -
Java – iterates the bits of char
Suppose I have a char "C" whose ASCII code is 0110 0111 How do I iterate its bits? I want to build a vector from these…… -
Java class with many types of ArrayList
I'm new to Android and Android Java and have questions about my server application communication My server always retu…… -
What does syso statement mean in Java?
What does the syso statement represent in Java? Solution System. out. Short for println(); In eclipse, you can type sy…… -
Try catch performance Java
How long (in nanoseconds) does it take to try catch exceptions instead of checking (assuming that the message has Hash…… -
Go to global variables that are not covered by goroutines
I write CMS in go and have session type (user ID, page content to be rendered, etc.) Ideally, I want this type to be a…… -
Automatically compare Java analysis results of a single unit test
I want to run a single unit test and collect its "analysis" information: the frequency of each method call, how many i…… -
Java – does anyone know any collection of sprites?
I'm making 2D java games I hope the game looks good, so I need good sprites, but I want to focus on the coding of the …… -
Java – installs applications that have no icons or activities
I talked to my friend and he told me that some applications can be installed on Android without any activities or icon…… -
General architecture of data processing system running in Java for a long time?
I was asked to port legacy data processing applications to Java The current version of the system consists of nubmer o…… -
Side effect free methods in Java standard library
I'm working on Java programs that need information about the side effects of method calls For standard library classes…… -
Can ORM ODB for C generate code from the database
I am very new to this library, and it is usually orm I know that tools like entityframework can generate code from dat…… -
Java – in a single web Adding multiple servlets to XML
I tried on a web Two servlet classes run in XML, but it doesn't work. Each servlet class works independently web. In X…… -
Java – spring MVC controller and exception handling
I'd like to ask a best practice question about spring MVC controller Please check the following code: @ h_ 403_ 2@@Aut…… -
Asynchronous e-mail processing in Java Web Applications
When a user registers for a new account, I want to implement asynchronous email sending in my web application This mea…… -
Java – Maven 2 does not run JUnit 4 test
I'm having trouble running junit4 tests In https://stackoverflow.com/questions/2021771?sort=newest#sort -The same prob…… -
Java – monitor changes to collections
Suppose you have the following Java beans: public class MyBean { private List<String> names = new ArrayList&…… -
Why – in Java 1.8 – use functions instead of functions?
The order seems strange because in regular Java, the return type is always specified first For example: public static …… -
Use java to convert SOAP message format to socket message format, and vice versa
I am currently using java to study the conversion from SOAP message format to socket message format, and vice versa I ……