i have sql query like i need to write in jOOQ, any help. I tried the below Also,is there any way to avoid listing all columns in select. Instead of Something like Answer A derived table can be constructed like this: Also, is there any way to avoid listing all columns in select You’re looking for Table.a…
How to print data from csv file onto secondactivity?
I’m creating an app which has a csvfile stored in its Raw resource folder and when I click on a button in main Activity , it should print the data of the csvfile in second Activity. But when I launch …
RSocket retrieveFlux() with Kotlin
I am trying to write a client for my server (both in Kotlin and using Spring Reactive Web). I encountered this problem while trying to use the RSocket. How can I get a Flux using RSocket? Answer You need to get reference of Class. You can use either Int::class.java or Int::class depending whether you need jav…
What is TAG in log.d(TAG, message)?
I want to log a Catch exception in the log cat but i don’t know the tags of log.d. Can someone help me? in all examples is see this log.d(TAG, message) but I don’t know what goes in this TAG, please help me. I tried this for example log.d(Error, “Error: ” + e) but it didn’t work.…
How to check recyclerview is empty or not using dataSnapshot.hasChildren()
I am using firebasedatabase to show my data into recyclerview. I want to show simple toast when my recyclerview is empty and i am using dataSnapshot.hasChildren() for checking the database haschildren or not. here is code when data is available the dataSnapshot.hasChildren() giving true value but when no data…
Input Object into an array as a List in Java
I am a beginner in Java. I want to get input from the user to a 2D array, and convert into a list of objects. When I hardcoded the data, it could be done as this way but, I want to get this object arrays from the user input. When I am going to do this way, it was giving
how to create a folder and file in internal storage using kotlin
I’m trying to create a file and folder on my internal storage in manifest i have these permissions. i got this i tried so many other thing from javatpoint to official java and kotlin tutorials. but none worked Answer ok got it,not specifying proper path. then to check this, navigate to Android -> dat…
Java: How got check colors from an invisible panel
is it possible to read colors of you mouse position of an invisible panel? I want to have an “invisible overlay” with an color coded image. I used the Robot class to get my mouse position and the color. It works fine on my visible image, but if I set the image to invisible, it completely gets igno…
For loop is printing out multiple print statements
I’m making a program for class which prints out the number of vowels in a word and any help would be appreciated. Currently, the program prints out the correct number of vowels but also prints out the print statement, “vowels:” multiple times before. I’ve tried moving the print stateme…
Array out of bound exception while doing topological sort
This code takes the no. of nodes in a graph and creates the graph with the number of nodes and then the user has to input the one-way edges between two vertices.(The formed Graph is a Directed Acyclic Graph or DAG). The graph is then sorted by the topological sorting function topoSort The problem is in the to…