Java , i need help with my code , i think the problem is in the ( for loop )

this is my code:

package aa;

import java.awt.*;

import javax.swing.*;

class GraphicsCanvas extends JPanel

{

@Override

public void paintComponent(Graphics g)

{

super.paintComponent(g);

g.setColor(Color.red);

DDA_DrawDashedLine(100,100,750,450,g) ;

}

void DDA_DrawDashedLine(double X1, double Y1,double X2, double Y2, Graphics g)

{

double diff_x = X2-X1;

double diff_y= Y2-Y1;

double steps;

if(diff_x> diff_y)

steps = Math.abs(diff_x);

else

steps = Math.abs(diff_y);

double x_increment = diff_x/steps;

double y_increment = diff_y/steps;

double pointX = X1;

double pointY = Y1;

g.drawOval((int)pointX,(int)pointY, 1, 1);

for(int i=0 ; i

{

pointX = pointX + x_increment;

pointY = pointY + y_increment;

g.drawOval((int)pointX,(int)pointY,1,1);

}

}

}

public class aa extends JFrame

{

aa ()

{

initUI();

}

void initUI()

{

add(new GraphicsCanvas());

setTitle(" Graphics Lab 1B");

setSize(1000,1000);

}

public static void main(String[] args)

{

aa obj_graphics = new aa ();

obj_graphics.setVisible(true);

}

}

----------------

and this is the question

---------------

and this is my output :

Output: Exercise. Modify the method in above example to draw dashed line. void DDA Draw DashedLine(double X1, double Y1,double X2, double Ya, Graphies > Lab 18 A ENG 6 0 3