Recent Posts
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Using java to attach nodes to existing XML files
Hello, I'm looking for a solution to attach nodes in Java to existing XML files <data> <people> <pe…… -
What does the name of an object in Java mean (array, ArrayList)
See English answers > java arrays printing out weight numbers and text 10 ArrayList<Integer> myList = new Arr…… -
Java – why use superclass references for objects?
See English answers > What does it mean to "program to an interface"? 32 public class Musician { public void p…… -
Java – draws a smooth color scale and assigns a specific value to it
I am considering a new implementation, a simple 2D graphics matrix, in which the color of the items depends on the val…… -
Java – can we initialize an object with the help of the constructor of another class?
Can we initialize an object with the help of the constructor of another class? class1 object = new class2(); Solution …… -
JMX monitoring / statistics in akka application
In addition to the cluster MBean, is there a built-in JMX public monitoring / statistics that can be enabled in akka (…… -
Java servlet DB username and password storage location
I am a beginner of servlet Solution Can I store DB users and pass them in to the web XML for easy configuration? >O…… -
Java – private constructors and instances – multiple choice
I try to find the answers to the following questions I tried to find the answer on Google, but people seem to have dif…… -
Java – jpaitemwriter: no transaction is in progress
I want to use jpaitemwriter to batch persist entities But when I use the following code to insist, I am told: Hibernat…… -
Java – NullPointerException when accessing array in class
I am new to this forum and Java The following code compiles, but when I try to enter a value for a variable, I get Nul…… -
Calculates the number of sequences in a vector
See English answer > How can I count runs in a sequence? 2 bin <- c(1,1,1) I'll get 5 I haven't found any existi…… -
How to use java to get git information?
Is there any way to programmatically retrieve git information using Java? I want to know: >All branches in the curr…… -
Java – generate ECDSA signature using secp256r1 curve and sha256 algorithm – bouncycastle
I am trying to generate a signature using ECDSA with secp256r1 curve (P256) and sha256 algorithm for message hashing I…… -
Java – how to add JButton to JScrollPane?
Hi, I want to make a desktop application here. I'm using JScrollPane I want to add a multipul button to the JScrollPan…… -
Reading streams over HTTP networks using Java I / O
Now I'm trying to improve the performance of Java I / O I have some crazy questions about using Java I / O to read / w…… -
Java – bean validation: how to manually create a constraintviolation?
I have a specific scenario where I can only manually check violations later in the process What I want to do is throw …… -
Missing instruction number in javap output
Whenever I try to understand the disassembly code of a compiled Java file, I wonder why some instruction numbers are m…… -
Time zone in Java – webapp
I want to know the best practices for dealing with time zones in web applications >When user1 adds a new date, it i…… -
Generic producers and consumers in Java
I have this method to retrieve objects that are instances of a given class: public class UtilitiesClass { public …… -
How can I deny Java fraction? This is a class I created
This is my fraction class code. There are several methods. My requirement is to take the numerator as a denominator: /…… -
JavaFX – how do I have tabpane populate its parent?
My tabpane seems to fill its width horizontally, not vertically My solution now is to do this: stage.getScene().height…… -
Java – how do I check if a field is empty and how do I read the entered text?
How to check whether the text field is empty, that is, if how to store the text in the variable is given, no input is …… -
Use Java 8’s lambda as a method parameter to avoid redundancy
I have a class with many methods like this (very simplified): public Record[] getRecordForXXX(String username,String p…… -
Java – strange behavior of quickfix / J after “sending test request test”
I am using quickfix / J to receive messages, but a test request has been sent The log file (fix. 4.2-a-b.event. Log) s…… -
Java – add() in fragmenttransaction cannot be applied?
Could not be added to the fragment transaction due to the following error. How would you do this? add() in FragmentTra…… -
Java – write lock to HashMap
I have an asynchronously updated HashMap I need to perform operations involving the map, which requires that the map d…… -
Java – using Otto, if I call it directly elsewhere, the method will only subscribe
I have a problem that one of my subscription methods will not be called for posts of the correct event type unless the…… -
Java – webtarget and thread safety
My understanding is that Jersey's webtargets are thread safe and can be called at the same time, but I have a concurre…… -
Split two points based on Java that do not include a single point
I have a string STR1 written in Java. I want to split it String str1 = "S1..R1..M1..D2..N3..S1.R1.M1.D2.N3.S1R1M1D2N3"…… -
Java – serialize the object containing the ArrayList object
public class User implements Serializable{ public class User implements Serializable{ public String name; …… -
Java – using action tabs and WebView
I want to have my application to display tabs at the top of the screen (make it work) and set up WebView. XML in the X…… -
Togglegroup using togglebuttons JavaFX
How to deselect all togglebuttons in the togglegroup in JavaFX? There seems to be no clearselection () function like t……