JComboBox to allow the user to choose colors for my shapes

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

// Class definition

public class Shapes extends JPanel implements ActionListener {

    private JButton moveLeft, moveRight, makeBigger, makeSmaller;
    private JComboBox shapeChoice, colorChoice;
    private Point firstPoint;
    private Circle firstCircle;
    private Square firstSquare;
    private Doughnut firstDoughnut;
    private Triangle firstTriangle;
    private Rectangle firstRectangle;
    private Point aShape;
    private Color col;  
    private Graphics g;
    private JSlider slider;
    private int value = 1; 
    // Constructor method declaration
        
        moveLeft = new JButton("Move Left");
        add(moveLeft);
        moveLeft.addActionListener(this);
       
        moveRight = new JButton("Move Right");
        add(moveRight);
        moveRight.addActionListener(this);
        
       // makeBigger = new JButton("Make Bigger");
        //add(makeBigger);
       // makeBigger.addActionListener(this);

       // makeSmaller = new JButton("Make Smaller");
        //add(makeSmaller);
       // makeSmaller.addActionListener(this);
        
        shapeChoice = new JComboBox();
        shapeChoice.addItem("Point");
        shapeChoice.addItem("Square");
        shapeChoice.addItem("Circle");
        shapeChoice.addItem("Doughnut");
        shapeChoice.addItem("Triangle");
        shapeChoice.addItem("Rectangle"); 
       
        add(shapeChoice);
        shapeChoice.addActionListener(this);

        colorChoice = new JComboBox(); 
        colorChoice.addItem("Blue"); 
        colorChoice.addItem("Green"); 
        colorChoice.addItem("Red"); 
        colorChoice.addItem("Yellow");
        colorChoice.addItem("Orange"); 
        colorChoice.addItem("Purple"); 
        colorChoice.addItem("Black"); 
        
        add(colorChoice); 
        colorChoice.addActionListener(this);
        
       
        
        // Instantiate shape classes
        firstPoint = new Point();
        firstCircle = new Circle();
        firstSquare = new Square();
        firstDoughnut = new Doughnut();
        firstRectangle = new Rectangle();
        firstTriangle = new Triangle();
        // Initially assign aShape a Point object
        aShape = firstPoint;
        
       
         slider = new JSlider(JSlider.HORIZONTAL, minimumValue, maximumValue, initValue);
       add(slider);
        
        // Create a new window using the Swing class JFrame and add this panel
        makeFrame();
    }
    
    public void actionPerformed(ActionEvent e) {
        // Manipulate respective object when buttons pressed
        
        if (e.getSource() == moveLeft) {
              aShape.moveXY(-20, 0);
        }

       else if (e.getSource() == moveRight) {
              aShape.moveXY(20, 0);
        }

        else if (e.getSource() == makeBigger) {
              aShape.reSize(20);
        }

        else if (e.getSource() == makeSmaller) {
              aShape.reSize(-20);
        }
        
         
        // checkbox assigns object to aShape
        else if (e.getSource() == shapeChoice) {
            if (shapeChoice.getSelectedItem().equals("Circle"))
                aShape = firstCircle;
            else if (shapeChoice.getSelectedItem().equals("Square"))
                aShape = firstSquare;
            else if (shapeChoice.getSelectedItem().equals("Point"))
                aShape = firstPoint;
            else if (shapeChoice.getSelectedItem().equals("Doughnut"))
                aShape = firstDoughnut;
                
            else if (shapeChoice.getSelectedItem().equals("Triangle"))
                aShape = firstTriangle;
             
             else if (shapeChoice.getSelectedItem().equals("Rectangle")) 
               aShape = firstRectangle;
            }
  
          
            else if (e.getSource() == value) {
         
        }
            
        
           { if (slider.getValue() >= 20)  aShape.reSize(20);
          
        
            if (slider.getValue() >= 30)   aShape.reSize(20);
          aShape.reSize(20);
        
           if  (slider.getValue() >= 40)  aShape.reSize(20);
           aShape.reSize(20);
        
            if (slider.getValue() >= 50)  aShape.reSize(20);
           aShape.reSize(20);
        
           if (slider.getValue() < 60)
           aShape.reSize(20);
        }
   {     
        
       if (e.getSource() == colorChoice) 
       {    
            
            // Ask Java to repaint the window to reflect the updates made
     repaint();
    }
}
}

    // Provide this method to instruct Java what to do when repainting the window
    public void paintComponent(Graphics g) {
        
        
        
      super.paintComponent(g);

        // Call the respective methods from respective class to print the new co-ordinate values
        aShape.outputXYCoords(g);
        g.setColor(Color.blue);
       aShape.display(g);
        add(slider, BorderLayout.SOUTH);
        
     
           
           
        
        }
    
       
  
        // Call the respective methods from respective class to redraw the shape
     
    // Create a window frame
    
    public void makeFrame() {

        // Instantiate a window frame using Swing class JFrame
        JFrame frame = new JFrame("Shapes");

        // When the window is closed terminate the application
        frame.addWindowListener(new WindowAdapter() {
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

        // set initial size of window
        frame.setSize(800, 600);

        // add the current object to the centre of the frame and make visible
        frame.getContentPane().add(this, BorderLayout.CENTER);
        frame.setVisible(true);
    }   
}