I am having following data in ArrayList in Java. I am trying to sort it by month in a year. It should sort by December, November, and so on. I have tried differ
What are Null Pointer Exceptions (java.lang.NullPointerException) and what causes them? What methods/tools can be used to determine the cause
I'm basically refining, completing and trying to compile a test code from a reference book for java beginners. The objective is to create a guessing game wherei
I am running for Java -version & javac -version in my cmd, but it isn't showing any output. It just goes to the next line, and doesn't show anything. Can an
When I try to run test containers I get the following error. The docker machine not found in /root/.sdkman/candidates/gradle/current/bin, /usr/local/sbin, /usr
I got an algorithm to write that set order of an Arrey but in a specific way. Find the lowest number of an array Save it at the start of the new array. Mark in
I have this number of list from the following dom, There are total 10 elements. I want to store the first 5 elements from the list in a variable. How can i do i
I need to un install my JDK 1.8 version from my Mac 12.2.1 Montere. However much I try I could not get rid of it. When I run $ java -version, I get openjdk vers
I've created a simple JTextField (this will have a mask after and I'll use this in multiple projects) and I'm trying to add in a simple JFrame, however, when I
At first, I write the following code, but it can't build. Arrays.sort(n, (o1 ,o2) -> o1 % 2 == 0 ? 1 : -1); enter image description here And then , I write a
How can I make this code a recursive method? for (int i = 3; i < arr.length; i++) { writer.write(arr[i] + "\n"); strout += arr[i] + "\n"; }
I have a few recyclerview in different activities and all of their items specified by sharedpreferences but after removing an item from sharedpreferences the re
Background: I am creating a login browser page before my main UI(myGUI) page is displayed. I am using a HashMap to store the correct username and password combi
I'm using HTTPS to connect to web services. The problem is that I need to connect to 2 web services and then they have different certificates. In this class the
I'm using PaymentIntent to make a payment. I specify the customer that has all the billing info, but the payment is specified as "Incomplete", I checked this ST
pls help me with below code snippet understanding /*package whatever //do not write package name here */ import java.io.*; import java.util.BitSet; class GFG {
I have upgraded my Android Studio and after that I'm facing this error: Gradle sync failed: Plugin [id: 'com.android.application', version: '7.1.2', apply: fals
Describing of context: java app (running under wildfly) works under high workload and heap is almost filled. Because of that full GC runs often and this leads t
I'm making a request to my server, but the response is given in String, and I need to get data from there, for example, the if response: {"response":{"balance":
I am working on Aadhaar Paperless Offline e-kyc, trying to validate aadhaar XML signature using public key certificate. But I'm not sure is this the right way t