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);
 
 
 
	}
 
}

I have moved your post to a more appropriate forum...

				Color color = getBackground();
				if(event.getSource()== day)
					color = Color.YELLOW;
				else if (event.getSource()== night)
					 color = Color.BLACK;
				repaint();

What part of the above code makes you think you change the background color of the JPanel? In other words, where do you set the background color of the JPanel?

Originally Posted by Noob

I set the BackGround color of the panel inside the Paint Component?

And how does this relate to the color that is defined in the actionPerformed method?

Then it should allow the users to use the day button and night button to change the color of the panel that is specified. This is how i interpreted the code behavior

But how is it actually changing the color? The code sets the value of a local variable color, but nothing is actually done with that local variable.