Recent Posts
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Java – why is map conversion so narrow?
I know the difference between narrow transform and wide transform of RDD My question is which parameters can prove tha…… -
Java – what class What does the forname () method do for JDBC?
See the English answer > what is the purpose of 'class forName(“MY_JDBC_DRIVER”)’? 4 Class.forName("com.MysqL.jdbc.…… -
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, 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 inheritance and method parsing order
I have the following code example: class p { public void druckauftrag() { // ... drucke(); } …… -
Java – selenium: http: / / localhost: 4444 / WD / hub returns NullPointerException. What did I do wrong
Given: try using this code to use remotewebdriver in c# var url = new Uri("http://localhost:4444/wd/hub"); var wd = ne…… -
Is java actually doing something with empty statements?
The official documents just say ( https://docs.oracle.com/javase/specs/jls/se7/html/jls-14.html#jls -14.6) Declaration…… -
Java – Android: reverse the position of recyclerview
I'm setting up a recyclerview like a list. I want to have a button at the bottom of the list to add more views when cl…… -
Unable to run program “…” error = 2, no such file or directory (Java)
I'm trying to create a java program that will set up an SSH connection for me on my MacBook It prompts me for a user n…… -
Java – spring switch implementation based on runtime conditions
This is the simplified version I want to implement For example, suppose I am an interface called color There are many …… -
java – request. Is the servlet path returned by getservletpath () normalized?
1)request. Getservletpath () can return any path, such as / testfolder // testfolder/file. Txt, or whether the path is…… -
Java – “the eclipse executable launcher cannot find its on-demand shared library”
First of all, I know that many people have asked this. I have checked all these, but no one has solved my problem I ge…… -
Java – a concurrent collection that maintains the insertion order
I am looking for a concurrent list that can maintain the insertion order Does anyone have some good recommendations? I…… -
Java – NoSuchElementException when finding a match in the list
The following old-fashioned, simple code works normally (traversing the string list and returning true because it shou…… -
How to save UUID as binary in Java (16)
I have a table TestTable. The column ID is binary (16) and the name is varchar (50) I have been trying to store ordere…… -
Java – why do I use random run to get the same number?
I'm following a book and in this Code: Random rand = new Random(47); int i,j,k; j = rand.nextInt(100) + 1; …… -
Java – spring MVC and Hibernate cannot obtain the session of transaction synchronization for the current thread
I have a spring application that works with hibernate Hibernate session is not created Throw an error as shown below &…… -
Java – spring rest simulation context path
I tried to set the context path for spring rest mocks using the following code snippet: private mockmvc mockmvc; @Bef…… -
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 – 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…… -
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 – a unique list of elements for a given list
Given the ArrayList transaction of sorted integer ArrayLists, I am writing code to return its unique element For examp…… -
Java split () method with two separators
See the English answer > java – splitting string based on multiple delimiters abababa:nsndnfnng.leleelld_kdjdh I wa…… -
Java – * and * * differences
*What's the difference between and * *? Why** When using pattern Did not compile when compiling (". * *");? Solution S…… -
Java – obtain the currently logged in user from the spring angle
I use spring security in the spring boot application. I want to get the currently logged in user from the principal #g…… -
JavaFX – how to set the margins of borderpane in fxml?
I want to run this fxml code in JavaFX: <BorderPane fx:controller="com.bryantmorrill.chat.main.Controller" xm…… -
Java – how to wait for a page refresh in selenium
This is an extension of my previous question unable to understand on getting the value The situation here is as follow…… -
Why is java ` string The tochararray() ` and ‘new string (char []) methods do not accept charset encoding?
Why Java string Tochararray() and the new string (char []) methods do not accept character set encoding? If you are us…… -
java – NoClassDefFoundError org / apache / poi / ss / usermodel / Workbook
I'm running a shell script that calls Java classes to get some data from the database and use the data to create an ex…… -
What does OIO mean in Java?
Please forgive me for just starting to learn java network programming I just read netty in action and mentioned an OIO…… -
Java – how to view the class name that contains the actual code
package a; package a; public class A { public String toString() { // return "I am an a.A"; is too primitive ;) …… -
java. Lang. illegalargumentexception: undefined filter parameter [P1]
I'm trying to execute hibernate filter This is my POJO course: @Entity @Table(name="flight") @FilterDef(name="f1",para……