I have JSON some thing like below I am aware how to iterate through JSON Array based on key and extract the values of that particular key. But stuck with one scenario let say instead of key i have value with if i have value ‘s1’ with me i want to traverse through above JSON and if it matches with
Tag: java
Converting java object to xml
How can i convert java object to xml? I am trying to convert an incoming java object to xml in spring integration with a converter bean. is there another way than marshalling in Jaxb ? like using @TypeConverter. Or implementing converter class. Answer I’m not familiar with @TypeConverter, but looks that…
Java NullPointer Custom Validator javax.validation.ConstraintValidator
I have the following Validator that I use to validate an Update Request. object.getIdCreditor() has a value, but the execution of the findById method “creditorRepository.findById(object.getIdCreditor())” goes into NullPointer exception I don’t understand what’s wrong. Answer I solved i…
value not injecting in @ReuqestBody POJO from application-dev.properties – SpringBoot Application
I am new to Java SpringBoot and I am trying to inject a default value from application-dev.properties file. Basically, the idea is to set default value to RequestObject’s id property, default value being injected(/fetched) from application-dev.properties. UseCase: In case, no data or blank data is being…
How to make use of key events USing Intellij IDE and StdDraw as GUI?
I need to make space invaders in java. I am however struggling to implement key events into my program. Currently I have 2 classes, MainMenu.java and FrameListener.java. Noting happens when I press keys. What am I doing wrong? MAINMENU.JAVA FRAMELISTENER.JAVA Answer
Spring Cloud Gateway – How To Modify Response Body In Post Filter
So far, I’ve not seen any solutions that is working for me. I’ve tried this and this. Here is my custom filter: The ModifyResponseBodyGatewayFilterFactory works if I implement it in a pre-filter, but how do I modify it in the post-filter. Answer To answer the question about modifying the response …
Cache is not returning data after expiry even keepDataAfterExpired(true) is set
My Use case: I have to return the updated data from the cache every time without hitting the DB. So i have used RefreshAhead feature of Cache2K. Issue: I am facing few issues. I have kept expiry interval as 1 Minute, eternal = false and keepDataAfterExpired = TRUE. But after 1 Minute when I am trying to get t…
Need help to run an if statement inside an object to change that objects attributes (JAVA)
Im not extremely high level at this and this is my first time really working with objects and classes. I am trying to make a card game and want to color the card’s suit name either red or black with the Java color code things. Each card is its own object, with a suit and a number value. Heres the
Java: Generate array from 1 to n with step size
I have trouble with a quite easy task. I want to have an array from 0 to a value n with step size t, always ending with n. Example 1: n=10, t=3, array={0, 3, 6, 9, 10} Example 2: n=20, t=5, array={0, 5, 10, 15, 20} Example 3: n=1, t=1, array={0, 1} I have code which I have been using
how to handle multiple views in RecyclerView adapter
the problem that I implement a ReyclerView with a custom ItemClickListener inside the adapter: and here is the whole code (for Adapter): so the problem that when I have overridden the ItemClickListener inside the activity to control the views inside the list-item( I will attach the code of the activity and th…