How can I change the color of a specific shape in a Java Swing JPanel containing many shapes?

Question

im trying to make a gui visualizer for a certine graph (only one graph ) and I want to visulize the travelling sales man problem on it , so first i will draw the graph and then I will solve it using some algorithims, im using swing and im drawing all the shapes (circles and lines) on a panel by overriding the paint method , what im trying to do is to change the color of any shape I want in the middle of my program
the problem im struggling with is how to change the color of any shape that I draw ,all my vertices will hava a shape object that i will add to the Graphics2D object of the panel that I will draw on, but how to change the color of only one shape from the many shapes that I draw on the same panel shape dosn't have setcolor() methode and i can only change the Graphics2D object color and if I did this the whole graph will be changed to the new color

I want to draw many shapes inside the JPanel and I want to be able to change the color of any shape I want during my program

public class Graphtesting {


public static void main(String[] args) {
    Scanner sc=new Scanner(System.in);
    JFrame frame=new JFrame();
    frame.setDefaultCloseOperation(3);
    My_Panel panel=new My_Panel();
    frame.add(panel);
    frame.pack();
    frame.setVisible(true);
    int var=sc.nextInt();
    if(var==0)
    {
        // i want to change the color of oval 2 only and not both 
        //panel.oval_1.setcolor()    i want to do something like this but shape dosn't have a function to set color 
        // its like i want a seprate graphics2d object for each one of my shapes because i want to be able to change the color of each one individualy 
    }
    else
    {
        // i want to change the color of oval 1 only and not both 
    }
     
}
}


class My_Panel extends JPanel
{
    Ellipse2D.Double oval_1;
    Ellipse2D.Double oval_2;
    
    My_Panel()
    {
        setPreferredSize(new Dimension(500,500));
    
    }
    @Override
    public void paintComponent(Graphics g){

Graphics2D g2d=(Graphics2D)g;

 oval_1=new Ellipse2D.Double(10,10,50,50);

 oval_2=new Ellipse2D.Double(60,60,50,50);

g2d.setColor(Color.orange);  

g2d.fill(oval_2);    
         
g2d.setColor(Color.red); 

g2d.fill(oval_1);
}
}