I am trying to returns a string representation of my circular queue heres what I have so far. (Im not allowed to use/import other libraries in my code) My public String toString( ) doesn’t return the right numbers on my test driver. I think it has something to do with it not circling the array. And my d…
Tag: java
Gatling constant concurrent users request per second
I am running gatling script to measure my api performance. Below is the configuration which ramps up the user from 0 to 100 and eventually reaches 400 . Is is true to say in last step constantConcurrentUsers(400) 400 request called per second . Is below script calling 400 request/sec in last step ? Answer Abs…
How to avoid duplicate code in Java when you require the same class in two separated applications?
For the sake of simplicity, let’s say that I have a class named “Dog”. Then I have two separated applications containing implementations of that class. Application “A” does something with the Dog class. Application “B” does another something with the Dog class. Both a…
Eclipse & E-Git: checking out old Github revisions for comparison – but can’t checkout/restore current HEAD revision
I have a longtime question here about checking out old Git revisions. There’s a feature in Eclipse where you can view your “Git History” via the Team Version Control History view and see all of your commits. If you right-click old revisions, you can click “Checkout” in the contex…
How to get X pixel value from date index or string in JFreeChart?
I have the following sample app : How to implement the 2 “getX()” methods above, so they will return the X pixel values by inputting date index or date string ? Answer Given a ChartPanel, seen here, the following method finds the index item in the priceSeries and converts its time to Java2D coordi…
why all thing is stop when i’ll use while loop in MouseEntered() Function ?? In Java
My gui programme that contains (JPanel ,JFrame ,JLabel) JLabel : I Coded it To move from (0x, 0y) To (200x ,0y) Pixel by Pixel . it will start when i put the mouse on the panel called “p” ,but when i try to run this programme it’s start correctly ,but when i put my mouse on the panel all thi…
Using GraalVM (scripting) within Wildfly/JBoss
I want to use GraalVM (version 22.0.0.2 with Java 17.0.2) to execute JavaScripts within Wildfly (version 26.0). If I do have the following code: then my JSE unit test, started from Eclise, works fine. But if I call the same code within my EAR within Wildfly, I get an What’s wrong? How can I inform Wildf…
How to find the JRE location to use the system JRE in eclipse
I’m trying to set up a java project to use openjdk-11 and all the answers I have found so far have me going in circles. I’m using ubuntu 20.04, so I used the command ‘sudo apt install openjdk-11-jre’. The installation seemed to be successful but now I can’t seem to figure out the…
Mapping pair of elements into one with Stream IPA
So I’m wondering what is the best solution to the following problem: I have a list of items (a custom class) in a java collection ex Each item in the collection however has a corresponding logical pair also in the collection (so the pair’s are not necessarily following each other by index in the c…
Trying to explain a a java for loop which requests JSON objects and requests for Queues
I’m trying to do a written report on some code and I found one on Youtube. However, I don’t understand how some of this loop works. I understand that it goes through every item in the list and fetches each value for each variable and that it then adds all values to a list which is presented in an …