Choose Color

package practice.pkg1;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class test extends JFrame{
    private JButton b;
    private Color color = (Color.BLACK);
    private JPanel panel;
    public test(){
        super("Choose Color");
        panel = new JPanel();
        panel.setBackground(color);
        b = new JButton("Choose a color : ");
        b.addActionListener(
                new ActionListener(){
                    public void actionPerformed(ActionEvent e){
                        color = JColorChooser.showDialog(null, "Pick your color",color);
                        if(color == null)
                            color = (Color.BLACK);
                        panel.setBackground(color);
                    }
                }
        );
        add(panel,BorderLayout.CENTER);
        add(b, BorderLayout.SOUTH);
        setSize(350,175);
        setVisible(true);
    }
}
public class Practice1{
    public static void main(String[] args) {
       test t = new test();
       t.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

}