I was trying to print digits of a number using recursion. The function I defined returns all the digits but I fail to print the last digit. Can any one point out what’s wrong in the code? Is there any other logic which is better than this with recursion? Answer That’s because you return the last character, but you print
Tag: java
Analysis of recursive approach for rotating an array of integers
While solving Array rotation on LeetCode, I wrote a recursive algorithm to solve the problem: Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Input: nums = [1,2,3,4,5,6,7], k = 3 Output: [5,6,7,1,2,3,4] Explanation: rotate 1 steps to the right: [7,1,2,3,4,5,6] rotate 2 steps to the right: [6,7,1,2,3,4,5] rotate 3 steps
Using StringBuilder to write XML vs XML library
I already understand from reading different threads that generating your own XML string using a StringBuilder is looked down upon, but the reason usually comes down to escaping characters. I’d like to know if anyone is experienced with XML libraries and writing XML using StringBuilders and know if there is a big difference in performance to writing an XML which
zip some modules including target directory from multi-module maven project
I have a multi-module maven project with the below hierarchy and wanted to create a zip after the mvn build and curl or upload it to one private repository. I am using the maven-assembly-plugin but it is not including the required directory. Please can you suggest something? I wanted to create a zip with subproject1 includes src, resources, and target
how to construct a java.security.interfaces.RSAPublicKey?
I have the following string, which I understand to be an RSA public key: I need to construct a java.security.interfaces.RSAPublicKey from this string. First I tried calling RSAPublicKeyImpl.newKey(myString.getBytes(StandardCharsets.UTF_8)), but that threw the following exception: Then, following an online guide, I tried this code instead: That threw a very similar exception, just wrapped in another one. Am I missing something obvious
Displaying notifications at a certain time with Android Studio
I’m pretty new to Android Studio and Java in general. I’m trying to build an app that, based on whether a checkbox is ticked in the app’s settings menu, will display a notification everyday at 8AM. I’ve figured out how to display the notification, but not how to trigger it at 8AM. This is the current notification code: My questions
Spring boot dependency error for some of the dependencies in maven
Below is my pom.xml Error message i am getting is But in most of the cases what I observed most of them wont declare any version for spring-boot-starter-data-jpa and spring-boot-starter-web but i am getting these errors I am getting errors for all the dependencies where i had not declared version So i want to know how to resolve these errors
AWS Lambda not finding Shared Object File in Layer
I’m trying to create a Lambda function that runs Selenium tests in Java as part of a CI/CD pipeline in AWS. However, after the function installs Chromedriver, it fails because a .so file that Chromedriver requires is missing: I have read that you can include native libraries via Software Layers in Lambda, and I understand that you have to compile
Get Original Field Name on GraphQL
I’m using https://github.com/leangen/graphql-spqr with spring-boot java application. I can reach to alias name easily but how can I reach to original fieldName? When I run this code, Output looks like with alias fields: “aliasNameX”, …, but I need original name like “originalName”. Is there a way to do it? Solved, according to: https://github.com/leangen/graphql-spqr/issues/381 Answer Posting my original answer here as
Java memory model and local variable [closed]
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