Java
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Java – headless painting
I want to draw JPanel as buffered image in headless mode (there is no GUI on the screen) final JPanel panel = createPa…… -
Java – JBoss application server and Servlet
I downloaded the latest version of JBoss. Com from JBoss website I created a dynamic web project and created a servlet…… -
Is java – readfull() at risk of suffocation?
I notice that when I use readfull() on a file instead of read (byte []), the processing time is greatly reduced Howeve…… -
Java – no JIT optimization
Look at this question: code: class test { public static void main(String abc[]) { for( int k=1; k<=…… -
How to delete the question mark in joptionpane?
How do I get rid of any markers in the upper left corner of joptionpane? int result = JOptionPane.showConfirmDialog(nu…… -
Java: understanding the execution of static methods
There are printa in class A and printb in class B. There are two methods Printa is a static method and printb is a non…… -
Square root in Java
Should I write in Java like that? If not, how should I write it? import java.util.*; public class Soru { public st…… -
Filling Java beans with opencsv – Code Description
I just started using Java and have a lot of missing knowledge, but I need to write a simple class that will use opencs…… -
Java – why not use a pseudo-random number generator to generate test data?
Test the correctness from the Book Java concurrency in practice, chapter 12.1, especially 12.1 3 test security (the au…… -
Java – Eclipse: get null display
I tried to pop up a dialog box (i.e. a FileDialog) in the Eclipse Plug-in. In fact, I was running the relevant UI laun…… -
Java – find friends of all users: how to implement Hadoop MapReduce?
Say I entered the following: (1,2)(2,1)(1,3)(3,4)(4,1) The output is expected to be as follows: (1,(2,3,4)) -> (1,3…… -
Can I construct arrays in Java without the number of elements?
There are some problems when using arrays in Java If I declare a character array like this, my program will throw an e…… -
Java generics copy constructor
I want to write a copy constructor for a commonly defined class I have an inner class node, which I use as a node of a…… -
Can ColdFusion CFC be instantiated from Java?
I know that a Java class can be instantiated from ColdFusion, but can ColdFusion CFC be instantiated from Java code? F…… -
Gets the value selected from the radio button in Java
import javax.swing.*; import javax.swing.*; import java.awt.*; public class RadioButtonTest extends JFrame { privat…… -
Java – traversal object array list
I am using native SQL to query with the following code private <T> List<T> executeNativeQuery(String query…… -
Java – why can’t I use multiple type parameters with wildcards?
For example, why can't I do this (I1 and I2 are two interfaces): List<? extends I1 & I2> myList; Note that I…… -
Java – changing the value of an array through methods in class
This is my code: class Myclass { private static int[] array; public static void main(String[] args) { …… -
WinForms – why does mstest hang while waiting for windowsformssynchronizationcontext?
I have a custom windows forms control that contains mstest unit tests I added a @ r to this class_ 419_ 2271 @, I need…… -
Java compilation error: open enumeration
I encountered a very strange mistake and I couldn't figure out how to solve it Projects compiled well on Windows canno…… -
Java – object instantiation using factory methods
I am currently taking CS2 course (data structure), in which Java is the language used. I am interested in comparing an…… -
Java – download files using selenium
I'm using selenium to test the system My code is as follows: FirefoxProfile fxProfile = new FirefoxProfile(); fxProfil…… -
java. util. concurrent. ExecutionException：java. lang.OutOfMemoryError：PermGen space
everybody I encountered an exception while running the server. I think this is a memory leak! I tried a lot of paramet…… -
Java – unable to get unique list element
I tried to extract a unique element from the class list with the following format: [EntityClientPlayerMP['Player989'/2…… -
Java – can I use appium – webdriver to run applications from a laptop (MAC) on a real device (iPhone)?
I have implemented appium to run my test cases on the iPhone / iPad simulator Using the simulator: capabilities.setCap…… -
Java – how do I modify this program to use ArrayList?
First, the following is a description: As far as the code is concerned, I have completed all the contents required for…… -
Java – why do you always get nosuchmethoderror on locationawarelogger when running jetty?
I'm trying to embed jetty server into my automated test, so I added the following dependencies to my project: <depe…… -
Java – calendar gettime() returns only est
Calendar cl = Calendar.getInstance(TimeZone.getTimeZone("America/Los_Angeles")); Calendar cl = Calendar.getInstance(…… -
Java – Android – hidden but selectable EditText
I want to see an EditText in my android app that you can't see, but you can select and enter text In other words, I ho…… -
JavaFX table columns have different fonts from CSS
I want to set different fonts (actually just italics) in a column of the JavaFX table col.setCellFactory(TextFieldTabl…… -
Sonarqube and Java plug-ins are installed, and there are no rules under the quality configuration file
I have installed sonarqube 3.7.0 for it 3 and all related Java plug-ins Under the quality profile tab, I can't find an…… -
jpa – java. Lang. illegalargumentexception: you tried to set a parameter value with a string name that does not exist in the query string
I have the following named query: @ h_ 502_ 7@ @NamedQuery( name = "Userdetails.findByUsername",query = "SELECT u ……