# Tag: vector

## How to find point on the circumference of a circle from an angle

position holds the center of a circle with a diameter variable. enemy.position is the top left corner of a square which is an enemy, size is the width and height of the enemy. I am using pVector and line() from the processing.core.pApplet library in java. What I’m trying to do is draw a line from the circle to an enemy.

## How to convert lower triangular matrix into a vector?

I want to convert my triangular matrix into a vector. Let’s say I have 7×7 lower triangular matrix. Something like this: And I need to convert this matrix into a vector ignoring zeros. So, the result should be: I have already made a matrix by the following code: But I don’t really get how to convert that into a vector.

## How do I add two string elements in vector?

I am new to Java and learning through a task. I have tried to create a program but when I input my name it is raising a InputMismatchException exception. Here is my code: Name.java Answer Your problem is not with vector, it is with scanner methods; you can read this answer, it will give you a good idea about how

## Best way to convert an array of integers to a vector? in java

I have an array like So i wanted it convert it into an vector I did try and got this error Is there a way to change the types or a faster method than this? Answer NB: Before I answer the question, Vector is deprecated and should never be used. You’re looking for List. Whatever property Vector has that makes

## An array is monotonic if it is either monotone increasing or monotone decreasing

Can anyone please explain how the return value is working. Answer increasing || decreasing means increasing OR decreasing. If either variable is true then the whole method will return true, otherwise it will return false. || is the logical OR operator.

## Android Vector Icon – Add a border

I’m wondering if it may be possible to add a white border to a Android Vector Icon (xml format). I’ve tried to overlap a bigger version of the icon itself, but the result it’s not as I was expecting (as you can see in the attached images). Is there a way to modify the xml to enlarge a bit the

## How to check if user defined entry in vector in java?

I have a vector of entries. Each entry is an instance of this class: The vector is declared as shown below: After that, the vector is populated. Then I want to check if certain key is somewhere in the vector. So I do this: This seems not to work. Why? How can I get it to work? P.S. CustomSet is

## What are the differences between ArrayList and Vector?

What are the differences between the two data structures ArrayList and Vector, and where should you use each of them? Answer Differences Vectors are synchronized, ArrayLists are not. Data Growth Methods Use ArrayLists if there is no specific requirement to use Vectors. Synchronization If multiple threads access an ArrayList concurrently then we must externally synchronize the block of code which