I’ve seen a bunch of solutions for this question but no matter what I try, IDEA still reports an error. Consider the following block: This reports a warning of ‘OptionalDouble.getAsDouble()’ without ‘isPresent()’ check. If I try this then it doesn’t compile: Neither does this: Or this: While i know these optional doubles will never be null, i’d like to resolve
Tag: java
Groovy Shell Sandboxing Best Practices
I am trying to set up a Groovy Shell sandbox that can execute untrusted code. These untrusted codes are provided by the end users (developers) as behaviour configurations, e.g. how to determine if a person is high net worth. So, they really are part of the main program. I need to make sure that I am not vulnerable to any
Java warning: [options] system modules path not set in conjunction with -source 11
This machine has had multiple version of Java JDK installed and multiple version of multiple IDEs (Netbeans, IntelliJ, Eclipse, etc.) Most recently, I have added JDK 15.0.2 and Netbeans 12.2. When trying to compile a simple “Hello World”, this is the output that results: As you can see, the file compiles and runs, but the warning is causing me concern.
Image and PDF files getting corrupted while uploading on AWS S3
I am trying to upload images and PDF on AWS S3 using my Spring Boot app. They are getting uploaded in corrupt format without any error. Text files are uploaded successfully. Below is the dependencies we have used. Answer My code works fine. The issue was in the AWS API Gateway. We need to add ‘*/*’ in the Binary Media
Recursively getting string user input with Scanner class in java
So, I want to receive input from the user, check if they used alphabetical values and then check if it is too long. If too long, I want to start again from the top (checking if alphabetical) by calling the method I am in. However, when I start over and I type, say “Danny”, this will show: Output: “Thank you,
Access Kotlin Jooq generated sources in JAVA
I am using Jooq 3.14.7 version to generate Kotlin sources. My code base has both Java and Kotlin class and we are transitioning to Kotlin. I am able to access Jooq sources in Kotlin class like below (FetchBooks.kt) But in Java classes I have to go like this below (FetchBooks.java) This seems a pretty messy way in Java. Any suggestions?
Read properties file from classpath (non-maven)
When I try to run my jar from another directory it cannot see the “config” folder with the “url.properties” file in it. Inside MyProperties class I have the following code, which runs perfectly when run from the same dir: The class that contains this code is in the following tree: It runs fine if I run this jar which contains
Why counter just increase to 1 in firebase?
im trying to increase a visitor counter views when access to read a message, so i made a method called incrementar () and set it where i retrieve info when someone click to open that post. But i dont know why only increase to 1 view in firebase, if i click again it does not increase. should use shared preferences?
How to Visible/Invisible using OnClickListener?
I am working on FAQ page I don’t want to use Expandable list view and stuff. So I set 2 TextViews(1 for Question and 1 for Answer) and made one clickable. The above image shows when the first textview mfaq is clicked it sets second one mAns to visible. The below code works well to Set the mAns textview visible:
Room Database. Insert sucessfull but no data found
I’ve got a simple Room database setup as seen below: Entity Class My Dao Interface: My Database: Finally my ViewModel: And my Activity where I print the results: As you can see from the code, I first try creating a default user in my database. If the insert is sucessfull, which it is cause I always enter the onSucess function,