As we know Kotlin and Java are inter-operable. When I try to access Java static variable inside Kotlin code it works, but when I try to access companion object in Java, it does not work. Answer you just need to add JvmStatic annotation
Tag: java
Subtract number of days without impacting the time
I have the following piece of code. I’m trying to get the epoch value t for exactly 10 days ago, at the current time. But when I convert t back to a date/time using https://www.epochconverter.com/, the printed result’s time is not correct. What am I missing? Answer I suggest you use OffsetDateTime…
Spring Boot returns Error 404 even though mapping has been set
I downloaded a Spring Boot project from Spring Initializr. I am trying to call sayHello() method in DemoApplication.java. Here are my code. DemoApplication.java pom.xml When I run on http://localhost:8080/hello it returns error 404 page. It does not call sayHello() method even though I have set the GET mappin…
How can I do the input loop that exits the program?
“Enter a word or press ‘Q’ to quit” but I don’t know how to do it. It seems confusing to me a little bit. This is my first time coding in Java and I’m still learning. Answer
How to disable notification sound with keeping heads up notification?
I want I’m noob for android. My app displays heads up notification. Now, my app always ringing when it listen notification regardless silent mode ON/OFF. I want to do next things. Disable notification sound with keeping heads up notification in silent mode. Thanks for your help. Problem My app ringing w…
Rendering 3D objects on 2D Canvas using Java AWT
I’m trying to port this JS code on Java because I got bored with programming a prototype of my 2D Java Game and I wanted to make my game into 3D, then I got this weird rendering bug, I think my math or logic was off… Sample data: Legend: Cube: the actual cube, has a transform of x, y, z
Minor question about Segmented Code Cache (http://openjdk.java.net/jeps/197)
I see that this JEP (http://openjdk.java.net/jeps/197) introduced 3 types of code caches. The most obvious one to me is -XX:NonNMethodCodeHeapSize. This is the one that deals with JVM internal data. What I do not understand is what is the difference between NonProfiledCodeHeapSize and ProfiledCodeHeapSize. Th…
Is there a way to make my code not case sensitive and shortcut words?
I’m trying to make it so when a user inputs an option its not case sensitive and they don’t have to type the full option. I cant figure out how to do it. Answer You can assign numbers to identify the tasks and ask user to enter number instead of typing in complete string and use the numbers in swi…
This keyword Java name similiar to parameter variable name
My understanding of the this keyword in java is that you are referencing instance variables as opposed to local variables within a method to save confusion between both names. As stupid as the question may seem, why would I have a parameter variable names similar to instance variable names? Or exactly the sam…
How is the gdal.Translate function used in the GDAL Java bindings?
I am trying to preform some processing (i.e. applying a function to the contents of each cell of a raster, and then writing that out as a new raster), where the SRS of the input dataset is different (and has a different extent) from the target SRS. To sole this, I attempted to use the gdal.Translate function …