I have a rest api exposed via @RepositoryRestResource from spring-data-rest-api. When I try to give the json payload from Postman to create a User linked to an Organization, it complains that Column ‘organizationId’ cannot be null, when I clearly provided it in the json. Each user belongs to an or…
Tag: java
How to copy excel sheet to the same worbook?
I’m trying to copy an existing excel sheet to the same workbook(it contains 3 sheets ) in java using Apache poi . Here is what i did : after running this code, the workbook contains always 3 sheets , the “copy_file” is not created, i’m not getting any errors or exceptions . any idea ? …
InputStream never gets EOF
Before anything, allow me to show you my client code: once connected to the actual socket, the client sends out some authentication data, but doesn’t recieve any data, now, it waits to recieve data from the server, and when it does, it processes it fine etc, except, when I stop the server (literally shu…
how do you create a directory that has 3 other directorys in it and so on
Im trying to create a sort of maze of directorys in java. one directory should have 3 other of it within it and those should also have 3 directory in them up until a certain “deepness level” is reached. I tried something but i couldn’t get it to work properly, it does create 3 folders in one…
Python Regex to Java
I am trying to convert a python regex to java. It finds a match in python but fails on the same string in java. Python regex : “(CommandLineEventConsumer)(x00x00)(.*?)(x00)(.*?)({})(x00x00)?([^x00]*)?”.format(event_consumer_name) Java regex : “(CommandLineEventConsumer)(\u0000\u0000)(.*?)(\u…
How to get dynamic numbers using xpath?
How do I get dynamically changing numbers in the span block ? Method: I can’t figure out how to do this. My method xpatch which returns the value: How can I get dynamically changing numbers in such blocks for further comparison? Answer byRaetUSD is a webelement you should call getText to get the text or…
Adding a ListView in a Fragment
I want to add a ListView to a Fragment. I created a FrameLayout in my activity_main.xml and then created 3 fragments (Home, Tags, Settings). What I did was create a bottom navigation view and created 3 frame layouts for the mentioned fragments. I searched the whole web on how to add a ListView to a Fragment, …
Kafka – Re-process messages in topics
I have a Kafka cluster. At this moment just for testing, there is only one topic and to this topic, 1 consumer is taking the same messages from the topic and processing, and storing them on the database. But, if I have any problem storing on the database and throw an exception, for example, a PersistenceExcep…
Ethiopian calendar in Android
I am developing an Android app for an Ethiopian company and have to deal with dates. The calendar used in Ethiopia is similar to the Gregorian one but has two main differences: it’s set approx. 7 years earlier and has 13 months. At the time I post this question the date is 13-09-2021 in the Gregorian ca…
Jackson serialize nested attribute with same name
Currently, I have a JSON response of the following type. I want to map my custom class to nested user attributes. But when I am trying to get the attribute, it is always sending null value. I think it is maping to first occurance of “user” in line no 2. How can I map it to correct user attribute i…