Untitled

package colorchange;

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

public class Colorchange 
{
    public static void main(String[] args) 
	{
		//Circle circle = new Circle(10,10);
		
		JFrame frame = new JFrame();
        final int FIELD_WIDTH = 20;
		
		final JButton greenBut = new JButton("Green");
		greenBut.addActionListener(new Actionlistener()
		{
			public void actionPerformed(ActionEvent event)
			{
				
			}
		});
		frame.setLayout(new FlowLayout());
    }
}