Java
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Splitting strings at specific locations in Java
Suppose you have a string in the form of "word1 word2 Word3 word4" The easiest way to split it is split [0] = "word1 w…… -
Java – regular expressions match 17 uppercase characters
In Java, which regex is more suitable for matching strings with a length of 17 characters? All strings are capitalized…… -
Java swing error ‘void’ type ‘is not allowed here
See the English answer > "'void 'type not allowed here" error (Java) 6 Code: public void create(JPanel jp){ jp.…… -
java – ！ list. Isempty() and list Size () > 0, same conditions?
I see such code if (!substanceList.isEmpty() && (substanceList.size() > 0)) { substanceText = createAmoun…… -
Java – spring boot with bluemix error: no buildpacks detected a compatible application
pace: >Use start spring. IO create a new project > run it locally – work > run gradle task jar > push jar …… -
Java – boxed Boolean equivalent
Quick question: are you sure this code is always true? Boolean b1 = true; Boolean b2 = true; System.out.println(b1 == …… -
Java – does the playframework return absolute URLs in HTTP instead of HTTPS?
I'm using only HTTPS in nginx play! A project is implemented in the framework Everything is normal, SSL is recognized,…… -
The value passed by Java is explicit
See English answer > is java "pass by reference" or "pass by value"? 78 Cell boardGame[][] = new Cell[8][8]; I need…… -
Java – is there a way to fix the window?
Is there any way to fix the window so that users cannot change the window size in Java? Solution The frame class (and …… -
Java compensate 0.05 for money
I have 7.125 (double) and need to make it 7.15 What is the easiest way? Found round, but I got 7.13, please help thank…… -
Can I load one of two different classes in java with the same name?
I have a lot of code to call static methods on foo, such as "foo. Method()" I have two different foo implementations a…… -
A strongly referenced class in Java, used for anonymous classes
I want to use hard reference classes in my java code, but, of course, none Is there any other way to do what I want, o…… -
Java – classloader loads the wrong file
I use this snippet to get the file as the input stream File version Txt is packaged in the jar of my application, whic…… -
Java conversion / classloader problem
The following is a simplified version of the problem: SomeClass c = (SomeClass) obj.getSomeClassParent() Not always, e…… -
Java – calculate line of code – quality metircs
I'm providing lines of code for my java project, which also contains many XML files Now my problem is to calculate the…… -
Java – what does the “this” context mean?
I checked many Android tutorials through the Internet In these tutorials, they use this context everywhere I know what…… -
Java – abstract and anonymous classes
See English answers > Creating the instance of abstract class or anonymous class 8 abstract class Two { Two() {…… -
From ArrayList – Java updates jlabel every x seconds
I have a simple java program, which reads a text file, splits it with "" (space), displays the first word, waits 2 sec…… -
Nsurlconnection – variable nshtturlresponse or nsurlresponse
I need to modify the response header in the nsurlresponse Is that possible? Solution I just talked about it with my fr…… -
Java – JFrame with multiple layers
I have a window with two layers: a static background and a foreground containing moving objects My idea is to draw the…… -
Java: object oriented design; LinkedList and stack
I am writing BFS and DFS in Java What I want to do is create a class like this: /** Preforms BFS and DFS on ... */ pub…… -
Sorting tuple counts in Java
I'm building a class with string to integer mapping So if I have three apples, I will map apples to three I need to wr…… -
Java – how to perform a series of sorting operations (multiple sorting conditions) on ArrayList
I have an ArrayList of objects on which I want to run a series of sorting operations I want to sort them by name first…… -
Java – spring: how to ensure that a class is instantiated only by spring, not by new
Is it possible to ensure that only spring can instantiate a class instead of using the keyword new at compile time? (a…… -
How many classes and packages do we have in Java 6?
I want to know the number of built-in classes and packages provided by Java 6 Please provide a web address for this in…… -
Java – create a unique random number
I created the following method to create a unique random number (this unique value belongs to the node of the tree): s…… -
Java – cannot interpret NullPointerException
In the following code, I have a method to get the vector of people with the same constellation Persoane is vector <…… -
Java – how to parse and interpret ant’s build xml
Is there any for reading and ant build XML and retrieve the ant API of the element from it? Specifically, I want to be…… -
What are the benefits of Java – executors?
In a life without Java executors, a new thread must be created for each runnable task Creating new threads requires th…… -
Java – expect this loop to be infinite, but it’s not
This is my java code: public class Prog1 { public static void main(String[] args) { int x = 5; whi…… -
Java threads: determine which threads are still running
For debugging purposes, I want to find out which threads of my program are still running It appears that one or more t…… -
Java – convert string to list
Is this the correct way to convert a string to a list? List styles = (List)request.getParameter("styles"); Model ……