My Java 2D Classes Im Working On

//Keep in mind I'm still working on this and adding things to it.
public class CJRVector2D
{
    private CJRPoint2D xy;

    // Default constructor
    public CJRVector2D() { this.Set(0,0); }

    // Constructor
    public CJRVector2D( int x, int y ) { this.Set((double)x,(double)y); }
    public CJRVector2D( double x, double y ) { this.Set(x,y); }
    public CJRVector2D( float x, float y ) { this.Set((double)x,(double)y); }

    // Accessor Methods
    public double GetX() { return xy.X(); }
    public double GetY() { return xy.Y(); }

    // Mutator Methods
    public void SetX(double x) { xy.setX(x); }
    public void SetY(double y) { xy.setY(y); }
    public void Set(double x, double y) { this.SetX(x); this.SetY(y); }
    public void SetX(int x) { xy.setX((double)x); }
    public void SetY(int y) { xy.setY((double)y); }
    public void Set(int x, int y) { this.SetX(x); this.SetY(y); }
    public void SetX(float x) { xy.setX((double)x); }
    public void SetY(float y) { xy.setY((double)y); }
    public void Set(float x, float y) { this.SetX(x); this.SetY(y); }

    // Display Methods
    public void Display() { System.out.print("(" + this.GetX() + "," + this.GetY() + ")"); }
    public void DisplayLn() { System.out.println("(" + this.GetX() + "," + this.GetY() + ")"); }

    public void Negate() { this.Set((this.GetX() * -1),(this.GetY() * -1)); }

    public double LengthSquared() { return (this.GetX() * this.GetX() + this.GetY() * this.GetY()); }
    public double Length() { return Math.sqrt(this.GetX() * this.GetX() + this.GetY() * this.GetY()); }

    //ASMD of Vectors With Vectors
    public void Add(CJRVector2D v2)
    {
        double X = this.GetX() + v2.GetX();
        double Y = this.GetY() + v2.GetY();
        this.Set(X,Y);
    }
    public void Subtract(CJRVector2D v2)
    {
        double X = this.GetX() - v2.GetX();
        double Y = this.GetY() - v2.GetY();
        this.Set(X,Y);
    }
    public void Multiply(CJRVector2D v2)
    {
        double X = this.GetX() * v2.GetX();
        double Y = this.GetY() * v2.GetY();
        this.Set(X,Y);
    }
    public void Divide(CJRVector2D v2)
    {
        double X = this.GetX() / v2.GetX();
        double Y = this.GetY() / v2.GetY();
        this.Set(X,Y);
    }

    //Scalers Versions
    public void Add( double d )
    {
        double X = this.GetX() + d;
        double Y = this.GetY() + d;
        this.Set(X,Y);
    }
    public void Subtract( double d )
    {
        double X = this.GetX() - d;
        double Y = this.GetY() - d;
        this.Set(X,Y);
    }
    public void Multiply( double d )
    {
        double X = this.GetX() * d;
        double Y = this.GetY() * d;
        this.Set(X,Y);
    }
    public void Divide( double d )
    {
        double X = this.GetX() / d;
        double Y = this.GetY() / d;
        this.Set(X,Y);
    }
    public void Add( int d )
    {
        int X = (int)this.GetX() + d;
        int Y = (int)this.GetY() + d;
        this.Set(X,Y);
    }
    public void Subtract( int d )
    {
        int X = (int)this.GetX() - d;
        int Y = (int)this.GetY() - d;
        this.Set(X,Y);
    }
    public void Multiply( int d )
    {
        int X = (int)this.GetX() * d;
        int Y = (int)this.GetY() * d;
        this.Set(X,Y);
    }
    public void Divide( int d )
    {
        int X = (int)this.GetX() / d;
        int Y = (int)this.GetY() / d;
        this.Set(X,Y);
    }
    public void Add( float d )
    {
        float X = (float)this.GetX() + d;
        float Y = (float)this.GetY() + d;
        this.Set(X,Y);
    }
    public void Subtract( float d )
    {
        float X = (float)this.GetX() - d;
        float Y = (float)this.GetY() - d;
        this.Set(X,Y);
    }
    public void Multiply( float d )
    {
        float X = (float)this.GetX() * d;
        float Y = (float)this.GetY() * d;
        this.Set(X,Y);
    }
    public void Divide( float d )
    {
        float X = (float)this.GetX() / d;
        float Y = (float)this.GetY() / d;
        this.Set(X,Y);
    }

    public void Zero() { this.Set(0,0); System.out.println("(" + xy.X() + "," + xy.Y() + ")"); }

    public boolean Equals(CJRVector2D v2)
    {
        boolean Xx = (this.GetX() == v2.GetX());
        boolean Yy = (this.GetY() == v2.GetY());
        if(Xx && Yy)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    public boolean NotEquals(CJRVector2D v2)
    {
        boolean Xx = (this.GetX() == v2.GetX());
        boolean Yy = (this.GetY() == v2.GetY());
        if(!Xx && !Yy)
        {
            return true;
        }
        else
        {
            return false;
        }
    }

    public double DotProduct( CJRVector2D v2 )
    {
        double XX = (this.GetX() * v2.GetX());
        double YY = (this.GetY() * v2.GetY());
        return XX + YY;
    }
    public double CrossProduct( CJRVector2D v2 )
    {
        double XX = (this.GetX() * v2.GetX());
        double YY = (this.GetY() * v2.GetY());
        return XX - YY;
    }
}

//The point 2d that goes with it
public class CJRPoint2D extends Object
{
    private double x, y;

    public CJRPoint2D()
    {
        setX(0);
        setY(0);
    }

    //int constructor
    public CJRPoint2D(int x, int y) {
        setX(x);
        setY(y);
    }
    //float constructor
    public CJRPoint2D(float x, float y) {
        setX(x);
        setY(y);
    }
    //double constructor
    public CJRPoint2D(double x, double y) {
        setX(x);
        setY(y);
    }

    //X property
    double X() { return x; }
    public void setX(double x) { this.x = x; }
    public void setX(float x) { this.x = (double) x; }
    public void setX(int x) { this.x = (double) x; }

    //Y property
    double Y() { return y; }
    public void setY(double y) { this.y = y; }
    public void setY(float y) { this.y = (double) y; }
    public void setY(int y) { this.y = (double) y; }
}