In Java how should I command a 2D point to move along the vector line of distance to another point?

Question

I have a simple class 2Dpoints with two fields, x and y. I want to write a code so that I could command one point to moves slowly to another point, like so that it moves on the vector line of their distances. But I don't know how? I've first thought  that it should contain a for loop so that it would know, it should move till it reaches the other point something like for(int d=0 ; d<distance ; d++) but I don't know how should I then command it so that it would move on the line?

import java.lang.Math.*;

public class Punkt { 

    private int x;
    private int y;

    public Punkt(int x, int y) {
        this.x=x;
        this.y=y;
    }

    public int getX() {
        return x;
    }

    public int getY() {
        return y;
    }

    public void setX(int distance) {
        x = x + distance;
    }

    public void setY(int distance) {
        y = y + distance;
    }

    public void moveAbout(int dx, int dy) {
        x = x + dx;
        y = y + dy;
    }

    /// method for calculating the distance to another point
    public double giveDistance(Punkt otherPoint) {
        return Math.sqrt(
            (otherPoint.getY() - y) * 
            (otherPoint.getY() - y) + 
            (otherPoint.getX() - x) * 
            (otherPoint.getX() - x));
    
    }
}

Answer 1

I've commented the major lines:

import static java.lang.Math.*;

/**
 * Immutable structure. Functional way
 */
class Point { 
  public final double x;
  public final double y;

  public Point(double x, double y) {
    this.x = x;
    this.y = y;
  }

  /**
   * Here you are. This is what you want to implement.
   * from.moveTo(0.0, to) => from
   * from.moveTo(1.0, to) => to
   *
   * @param by - from 0.0 to 1.0 (from 0% to 100%)
   * @param target - move toward target by delta
   */
  public Point moveTo(double by, Point target) {
    Point delta = target.sub(this);
    return add(delta.dot(by));
  }

  public Point add(Point point) {
    return new Point(x + point.x, y + point.y);
  }

  public Point sub(Point point) {
    return new Point(x - point.x, y - point.y);
  }

  public Point dot(double v) {
    return new Point(v * x, v * y);
  }

  public double dist(Point point) {
    return sub(point).len();
  }

  public double len() {
    return sqrt(x * x + y * y);
  }

  public String toString() {
    return x + ":" + y;
  }
}

class Main {
  public static void main(String[] args) {
    Point source = new Point(2, 3);
    Point target = new Point(-4, 9);
    // You can utilize the cycle or implement kind of timer to animate something
    for (int t = 0; t <= 100; t++) {
      System.out.println(source.moveTo(0.01 * t, target));
    }
  }
}

https://replit.com/join/sucvdhpqoa-redneckz