public class Point3D {
    private double x;
    private double y;
    private double z;

    public Point3D(double _x, double _y, double _z){
        x = _x;
        y = _y;
        z = _z;
    }
    public void set(double[] _new){
        x = _new[0];
        y = _new[1];
        z = _new[2];
    }
    public double[] get(){
        return new double[]{x, y, z};
    }
}