i’m trying to build an data structures and algorithms program using java. and i wanna ask if anyone know How do i calculate the percentage increase or decrease in a array. i try this code–but apparently its not the correct way Run-> Percentage change is = Infinity % Answer Here you’re dealing with the numbers, which could go in the
How to mock a method call in a constructor?
I have class class1, which has 2 member variables: I want to test the method fun, so I will have to write a test-class and a test method for that. But, how do I mock the method call config.getEnablingStatus(), while creating an object of type classA in the test class? I am thinking of doing something like this [see the
Starting and Stopping an InboundChannelAdapter manually
I’m trying to start an InboundChannelAdapter manually using a @Scheduled function. I think I’m setting up the message payload wrong but I’m not sure what to have it as. Here’s the code: I’m getting this error: The error occurs at the controlBusChannel.send() line and the transformer in the error is the first one that runs after the source. How do
Execute sql native query from two entity using jpa or hibernate
I have 2 tables, salesOrder with column “id”, “customerId”, “textReview(boolean)” and table SalesOrderline with column “salesOrderId”, “productId”. i want to change boolean data in textReview column. I got data from the client in the form is customerId and productId. Native Query SQL that I made like this. update sales order set text_review = true where (select id from salesorder where
How to define a bean from a dependency class as @Primary in Spring?
I have a Kafka Consumer and I’m implementing it using the Spring Cloud Stream Source.class binding and InboundChannelAdapter. This Source.class defines 3 MessageChannel beans: output, nullChannel, and errorChannel. My code looks like this: I want to autowire in the output channel so that I can use it to start and stop my InboundChannelAdapter manually, but I’m getting this error when
Any comparasion condition returns bad value
I struggle with very strange behaviour while trying to compare two ints but first things first. Here is my method inside the class: public class CollectionsTutorial { private Collection<String&…
How to loop through a list payload and insert into database as individual row items in Springboot?
I am trying to insert items in a list in a database as single values in rows with the name of the sender. I am able to send the payload and insert into a single row with the user detailst. How can I loop through the payload sent and insert all the items into individual rows? I have tried to
Java Socket Read Input Twice
I have a situation with a Java Socket Input reader. I am trying to develop an URCAP for Universal Robots and for this I need to use JAVA. The situation is as follow: I connect to the Dashboard server through a socket on IP 127.0.0.1, and port 29999. After that the server send me a message “Connected: Universal Robots Dashboard
Print a string from ArrayList of String[] per Index?
How to print ArrayList of String[] into String per index with expected Output like this Here is the code and how to print it? Answer You were pretty close to it: This generates your String to be outputted. Printing: Just don’t forget to initialize yourArrayList prior of the method call.
Why can’t I add a type parameter to an overriding method?
I need to implement a method from a class Foo, in my subclass Bar: As you can see, my method would benefit from a type parameter: (I could also use raw types because I know it’ll work, but everything I’ve read says you really shouldn’t do that) Unfortunately, this is illegal – my method foo in Bar “clashes with foo()