I am trying to take values from user in ArrayList, I can take input for the size of ArrayList, But, when I am trying to add elements, the program is being terminating. Here is my code Answer You must use .readLine() also inside the loop: Running result:
Sending PubSub message manually in Dataflow
How can I send a PubSub message manually (that is to say, without using a PubsubIO) in Dataflow ? Importing (via Maven) google-cloud-dataflow-java-sdk-all 2.5.0 already imports a version of com.google.pubsub.v1 for which I was unable to find an easy way to send messages to a Pubsub topic (this version doesn&#…
How do i group by the contents of a string list using collect() of a Stream?
I have a database object that has a field that contains a list of strings. I retrieve all these objects and then use the flatMap and distinct stream methods on the resulting list to get a new list that holds all possible unique values that a database object string list can contain. Next i want to make a map w…
KeyCloak – Create Realms/Users/Groups Programmatically?
We’ve decided to move to KeyCloak for our identity and access management solution, rather than implement it entirely within our Java EE web app. We’re creating a multi-tenant solution, and would prefer to create security realms/users/groups programmatically through our workflow, rather than levera…
Failed to start bean ‘subProtocolWebSocketHandler’; nested exception is java.lang.IllegalArgumentException: No handlers
Answer Hm. Looks like you don’t register any endpoints via a WebSocketMessageBrokerConfigurer implementation and overriding its registerStompEndpoints(StompEndpointRegistry registry). Exactly this is a place where StompSubProtocolHandler is added to that SubProtocolWebSocketHandler:
JAXB not available on Tomcat 9 and Java 9/10
TLDR: On Java 9/10, a web app in Tomcat has no access to JAXB even though its reference implementation is present on the class path. Edit: No, this is not a duplicate of How to resolve java.lang.NoClassDefFoundError: javax/xml/bind/JAXBException in Java 9 – as you can tell by the What I tried section, I…
Accessing BroadCastReceiver in Viewmodel
I am struggling in choosing the right way to pass data from broadcastReceiver to ViewModel and from there I pass data to my Repository and update LiveData. I use FCM push notifications and have local broadCastReceiver which uses ActivityLifecycle. I found that it is bad practice to access ViewModel from Broad…
How do you invoke schemagen in Java 11?
According to Oracle documentation the schemagen tool is removed from the JDK as part of JEP 320 (http://openjdk.java.net/jeps/320). That JEP points to Maven artifacts that now supply the missing tools. The coordinates of the artifacts are wrong in the JEP, updated coordinates are found in an answer to this qu…
sum value from any list item in Recyclerview Adapter
This is my CartAdapter code, and in onBindViewHolder it get data from Getter and Setter (Get Cart). My purpose is to sum all of the product prices from all data that shows up in cart fragment. public …
Get 3D coordinates of vertices of rotated and scaled cuboid with scale, center position and rotation on all axis
I have been wrecking my brain trying to figure out this problem I have. I have a cuboid, its rotation on all 3 axis in relation to the world from its center (it’s on 3D space), the cuboid’s center’s position and the scale of the cube in all axis (width, height and depth). I need to find the …