I am trying to learn QueryDSL in order to return the results of a single search term from Postgres: But I also want to search for any number of search terms, for example, say this is my list of search terms divided by the plus symbol: How can I dynamically create contains(params[0]) AND/OR contains(params[1] …
dp[!t][val] for skipping the parts from array
consider the following snippet in cpp. This is taken from dynamic programming tutorial . It is mainly for space optimized knapsack problem. This snippet is taken from this tutorial. I want to convert this technique into java. But java does not support this type of integer manipulation. Please can anyone expla…
How to use Java Processbuilder to execute a class from another class
I am a student and pretty a novice in coding. I am trying to write a UDP-Server-Client project and execute Server, Client as Processes . However i don’t understand how to use the Processbuilder to do …
JPA @PreUpdate @Persist seems not working as expected
I have a problem for filling auditing fields by using @PreUpdate and @PrePersist. For instance When I’d like to update a client entity, the field updatedBy and updatedAt are still null; despite when I debug, the code of preUpdate() which is annotated with @PreUpdate is executed. Below the code of Auditi…
JavaFX: TextFields displayed from array, array updated / increased on button click – how to force the scene to redraw the updated array
I have a program that displays animals and their names: The method associated with Add animal button: The code inside addAnimals does execute, but the new text field doesn’t appear. How should I fix it? Answer You forgot to add the text fields to grid, just creating a textfield doesn’t show it you…
400 Bad request from Http request using java
I am following the “4. Java Socket Client Example: a HTTP Client” instruction from https://www.codejava.net/java-se/networking/java-socket-client-examples-tcp-ip in my Mac using IntelliJ. The Http config is as easy as: I copied the code without any change in the IntelliJ to test how would it work.…
Spring Batch : Remove stack trace of run time exception from exit description
In my Spring Batch Job if there is an unhandled exception in step ItemWriter (for ex Primary Key Violation because of bad data while saving to DB), my job fails and then I get another error because core spring batch is not able to update the failed exit status to BATCH_JOB_EXECUTION table. The Reason Being th…
HTTP Status 404 – Not Found: for controller – no view resolvers found in Idea
I have the following Spring MVC code: config files: contollers: I get the following errors when I deploy: Accessing the /api page, however, works just fine. EDIT: After replacing home.html with home, the error is still present – both in IDE and the 404 in browser: Also maybe it’s relevant – …
Ignoring only embedded member in AssertJ
I have two classes to test with JUnit/Mockito: Then in my test class, using AssertJ: The problem is that the name sk is in both classes, and I need to ignore it only in ClassA, not in ClassB. Is this possible in AssertJ? Answer According to the ignoringFields javadoc: Nested fields can be specified like this:…
Why won’t the background of my JFrame become black?
I’m working on a school project and I’m having trouble changing the background colour. For some reason it keeps showing up as the default grey colour instead of black. Answer You are replacing default content pane with yours one. so change background color after replacing content pane. OR do