I was expecting the ClassCastException when trying to run the following piece of code: I have commented the Comparator code and was trying to use without the Comparator. But I am still getting the correct output. How is this possible because StringBuffer doesn’t implement Comparable interface. I am usin…
Error in displaying data with TextView.setText: Resources$NotFoundException: String resource ID #0x0
I am getting this exception: The exception stack trace points to this line in the adapter class: This is my adapter class: This is my POJO class: Answer You’re accidentally calling the version of TextView.setText that takes an int resource ID. You should explicitly convert it to a String:
Mutate Java Array
I’m working on a coding problem where we have to mutate an existing array into a new array. The rules are that an element at the arrays index is equal to, a[i – 1] + a[i] + a[i + 1]. The catch is that if the a[i – 1] or a[i + 1] doesn’t exist, they should be counted as
Sum column SQLite Android and display on TextView
I have an SQLite DB in my Android Project. I have a RecyclerView for “Cart” Activity, where I display some items from this DB. Every item has its own “quantity” and “price”. What I want to do, is to create a method to display a total sum of elements (Total price = Elem1(qua…
MacOS Catalina(v 10.15.3): Error: “chromedriver” cannot be opened because the developer cannot be verified. Unable to launch the chrome browser
I have recently upgraded my mac machine to OS Catalina(v 10.15.3). After this upgrade I am unable to launch the chrome driver using selenium. I am facing the below error when I run the selenium code to launch the chrome browser. ““chromedriver” cannot be opened because the developer cannot be verified&#…
Parallel matrix multiplication in java
I am trying to implement matrix multiplication with multiple threads. Everything seems to work correctly, however, it work much slower than the usual algorithm. Here is my code Here, I create a new thread for each element in the resulting matrix. I than write these threads to an array, start them and, finally…
Why using an if statement inside a paintComponent(Graphics g) method invalidates all code inside the method?
I’m trying to create a JFrame object which contains a JPanel object. Inside the JPanel object there are 3 JButtons that when clicked, are intended to change the background color of the JPanel. I also want to draw an image which size equals the one of the JPanel object to give the impression of a backgro…
Why are windows shortcut not accessible when reading the directory
Recently I tried to write a small application to help me sort the shortcut on my desktop. I quickly noticed that the shortcuts (.lnk, .url) created by the system or an application ( an installer, the steam “create shortcut” function, etc) did not appear in the list of processed files. Thinking tha…
How to send a body with HTTP DELETE when using WebFlux?
I want to access an HTTP API which provides a DELETE endpoint. This particular endpoint expects a list of items (which I want to delete) as JSON body. Now, my problem is, I’m using Spring Webflux. But its WebClient doesn’t give me the possibility, to send a body with a DELETE request. For a POST, …
Window 10 Getting tomcat 9 to work on https
My goal is to use javascript webkitGetUserMedia to access the webcam and use java WebSocket on my LAN Network. I using apache-tomcat-9.0.20 with apache-maven-3.6.3 and eclipse ide. I am able to access the http on my network just fine. However, with https I’m only able to access on the server itself. I h…