Thread: Button does not change Background

Help, Clicking on jbutton doesn't change the the color of my background . Please help.

 
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JOptionPane;
import javax.swing.JButton;
import java.awt.Color;
 
 
public class EventHand {
 
	public static void main(String[] args) {
 
		JFrame frame =  new JFrame ();
		frame.setSize(1000,1000);
		frame.setVisible(true); 
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		draw Shapes = new draw ();
 
		frame.add(Shapes);
		frame.setLocationRelativeTo(null);
		frame.setTitle("Cool"); 
 
 
	}
 
 
}
 
public class draw extends JPanel  {
	 public JButton day;
	 public JButton night;
 
		public draw()  {
			setLayout(new FlowLayout());
			day= new JButton("Day");
			night = new JButton("Night");
			add(day);
			add(night);
 
		// building the class name The Handler
			theHandler handler = new theHandler();
		day.addActionListener(handler);
		night.addActionListener(handler);
		}
		public class theHandler implements ActionListener { 
 
 
			public  void actionPerformed(ActionEvent event) {
 
				Color color = getBackground();
				if(event.getSource()== day)
					color = Color.YELLOW;
				else if (event.getSource()== night)
					 color = Color.BLACK;
				repaint();
			}
 
		}
 
 
	public void drawing() {
		repaint();
 
 
	}
	public void paintComponent(Graphics g) {
		super.paintComponent(g);
		this.setBackground(Color.WHITE);
		g.setColor(Color.BLUE);
		g.fillRect(600,400,150,125);
 
		g.setColor(Color.RED);
		g.fillRoundRect(500,500,350,100,50,40); 
		//Bumper
		g.setColor(Color.BLUE);
		g.fillRect(525,600,300,40);
 
		// windshield Wiper
		g.setColor(Color.BLACK);
		g.drawLine(660, 440, 700, 500);
		// HeadLights
		g.setColor(Color.WHITE);
		g.fillOval(570,560,40,30);
		g.setColor(Color.WHITE);
		g.fillOval(750,560,40,30);
 
		g.setColor(Color.BLACK);
		g.fillOval(740,640,40,60);
		// TiRE
		g.setColor(Color.BLACK);
		g.fillOval(585,640,40,60);
 
 
 
	}
 
}