All Questions
1,320
questions
0
votes
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answers
60
views
Inverted colors of vector drawable
When I start the app some of my vector assets have the value of wrong color. If I start the app in light mode the vectors use the dark mode colors.
If the dark mode is turned on and then off then ...
- 1
1
vote
0
answers
83
views
Understanding reSize() and add() for Vector class
Hi I am struggling with a java problem.
I am trying to understand how to assign value x to new elements added to a vector where the existing elements would remain unchanged, e.g. if it was resized ...
- 11
-1
votes
1
answer
42
views
How should an ArrayList or similar structure be modified when elements regularly affect eachother every update of the container?
I am currently trying to create an entity based system for a game in Java with a handler class for updating and solving interaction between entities of different subclasses. They can damage each other ...
0
votes
1
answer
80
views
Question about vectors (player velocity) and Spigot API
I can’t understand how I can push the player back, left and right, I only understood how to push the player to the side where he is looking.
I tried to use ChatGPT but it produced code that doesn't ...
1
vote
1
answer
217
views
Java Vector Api comparing two vectors
Why using Java Vector API from Java 21 (incubator), I compare two vectors and copy result into array. It fauls with exception:
java.lang.IndexOutOfBoundsException: Index 4 out of bounds for length 2
...
- 577
0
votes
0
answers
17
views
Why wont my fireball go in the correct direction upon spawning?
I am making a Minecraft mod in Fabric, and one of the items I am adding is a simple fireball wand. Right click, and spawn a blaze fireball. Using raycast and vectors, I made what I thought would give ...
1
vote
1
answer
77
views
My quicksort method is not working as intended
I trying make a quicksort method whose only parameter is MyVector` (which is just a normal vector), but the method is not working as intended and I'm not sure why.
The expected output is supposed to ...
0
votes
2
answers
123
views
Conversion of Vector<Vector> to a String Array or a String[][]
I have a JTable containing only one columns of , called "Points"
Points
I have another JTable containing seven columns of , called "Lines"
Lines
I am writing a button handler that ...
-2
votes
1
answer
66
views
Why is my vector not printing the String? [duplicate]
I'm studying vectors and while practicing with a few exercises i got stuck in this particular one, my code doesn't seem to print the name string, and I don't know why. In the final project I have to ...
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3
votes
1
answer
112
views
How do I convert the numbers in my Vector<Object> into int?
How do I convert the numbers in my vector into int? I'm trying the numbers in my object array into int values for my if statenebt, but I can't find a way to do so. Can anyone help tell me what I would ...
-4
votes
1
answer
62
views
Can I create a vector of threads and use to process data concurrently from database table in Java?
`Can I create a vector of threads in java
Vector threads = new Vector<>(5);
And assign them to process data from database concurrently
I want to make a Java program where main method first check ...
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1
vote
0
answers
73
views
OpenJDK Vector API type conversion issue (Double to Float)
I'm using JDK21 EA to test the Vector API performance.
My original (non-vector) code looks like this:
double[] src;
double divisor;
float[] dst;
for (int i=0; i<src.length; ++i) {
if (src[i]<=...
0
votes
0
answers
35
views
Why Java Stack class (Vector) uses array instead of a reference to the last element?
If an advantage of a Stack is the fact that its can grow dynamically why java implementation is base on Vector which uses an array to hold the data of the "container" ?
When the capacity of ...
- 56
-1
votes
1
answer
202
views
Error class Java.util.Vector casting method
I'm using import java.util.Vector, and when I get to the line in red where I use the Vector, the below error occurs:
java.lang.ClassCastException: class javax.swing.JTable cannot be cast to class java....
-1
votes
1
answer
40
views
Rotation matrix not returning correct number on the Z Axis
I made a method in my Java code which translates a 3 coordinate vector into another 3 coordinate system basing my method on the rotation matrix which OpenGL used to have, here is the full method:
...
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