I’m doing a function that counts digits in a string: The error is: Any ideas how to fix that? Answer You are trying to invoke the charAt() method on a String[]. String[] does not have such a method, but String does. What I believe you wanted to do is: This will get the char at position i in the String
Spring Data MongoDB 4.0 transactions support
MongoDB 4.0 are going to introduce transactions support with ACID guarantees. Does Spring Data MongoDB already supports the transactions in MongoDB and if no, when this awesome feature will be available. I really need it, taking into account the following issue – MongoDB schema design in order to suppor…
SSLEngine Handshake stuck at second loop
I’m trying to implement an SSL Handshake using SSLEngine, I need to do it both ways as a sever and as a client as well, however I’m stuck and I cannot figure it out why. The handshake starts correctly, the Hello’s are exchanged, the keys are exchanged, but then I’m getting into a NEED_…
How to retrieve data from Firebase database and show the values in Google map?
In my database, I have values about location for each persons like that database structure and I want to retrieve data and show in the map. How get get and show? I created an ArrayList and details class constuctor for get a values. Answer To solve this, please use the following code: But I strongly recommend …
Add a jar file to another jar file
In my project I have this code that tell class loader to load Driver.class like so: In Eclipse it runs with no problems and I have created the Jar file of the project. But I don’t know how to insert the mysql-connector-java-5.1.7-bin.jar into a Jar file of my project. The folder structure look like this…
Manage RDS access with AWS Secrets Manager
I am currently working with Eclipse and the AWS Toolkit for Eclipse. My project already works and it is doing its job, which is to connect to an RDS instance and return JSON objects to API Gateway calls. I just got a new requirement, we are to use the service SecretsManager to authomatically rotate RDS config…
Maven Failsafe fails with java.lang.NoClassDefFoundError
I’ve started a new project: PostfixSQLConfig. It’s a simple Spring Boot application that is essentialy supposed to provide CRUD access for 4 simple databse tables. I wrote the the repository for the first table and some basic integration tests for said repository. Since this particular table shoul…
How can I reliably simulate touch events on Android without root (like Automate and Tasker)?
How can I reliably simulate touch events on Android (without rooting) from Java outside my app which runs as a background service? While this question has been asked before, most answers utilise ADB. (such as How to simulate touch events on Android device?) https://github.com/chetbox/android-mouse-cursor offe…
How to configure com.sun.net.httpserver to accept only requests from localhost?
I am using the com.sun.net.httpserver.HttpServer to handle some http requests. My http server runs behind nginx that maps the server domain names and forward the requests to my server by using it as a proxy running at a certain port. My http server takes all requests if they access the port where the server i…
getting firebase ServerValue.TimeSTAMP in wrong format, how to convert to Date?
I want to get Firebase Server current time, i searched stackoverflow, i found method ServerValue.TIMESTAMP and it’s returning value when i debugged .sv=timestamp i am getting above String, but can’t figure out how to convert it to date. I also tried getting it in hashmap, can somebody please help …