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 from 3 to 5 then the 4th and 5th would have value x.

Additionally, in the next class I want to add another vector _v to the current vector. If this is bigger than the length of the current vector that reSize(int _size) is called. How do I write this?

public class Vector {
    private double[] doubElements;

    public Vector(double[] _elements) {
        this.doubElements = _elements;
        
    }

public int getVectorSize() {
    
    return doubElements.length;
}

public Vector reSize(int _size) {
    if (_size == (doubElements.length - 1) || _size <= 0){
        return null;
    } else if (_size < (doubElements.length - 1)) {
        return new Vector(new double[]{doubElements[_size]});
    } else {
        return new Vector(new double[]{doubElements.add(-1.0)});
    }
    
}

public Vector add(Vector _v) {
    Vector.this.add(_v);
    if (getVectorSize(doubElements.length)) {
        reSize()...
        return null;
    }
}