Java

public class Polynomial
{
	private int[] coeff = new int[5];
	public Polynomial()
	{
		coeff = null;
	}
	// constructor with 5 parameter 
	public Polynomial(int c0, int c1, int c2, int c3, int c4)
	{
		this.coeff[0] = c4;
		this.coeff[1] = c3;
		this.coeff[2] = c2;
		this.coeff[3] = c1;
		this.coeff[4] = c0;
	}
	// copy constructor  
	public Polynomial(Polynomial p)
	{
		coeff = p.coeff;

	}
	
	// Get Method
	public int getCoeff(int i)
	{
		return this.coeff[i];
	}
	
	// Set Method
	public boolean setCoef(int pos, int num)
	{
		if (pos <= 4 || pos >= 0 )
			{
			coeff[pos] = num;
			return true;
			}
		else
			return false;
	}

	// toString
	public String toString()
	{
		return coeff[4]+"X4"+" + "+coeff[3]+"X3"+" + "+coeff[2]+"X2"+" + "+coeff[1]+"X"+" + "+coeff[0];
	}
	
	// Equals
	public boolean equals(Polynomial p)
	{
		if ((p.coeff[4] != coeff[4]) ||(p.coeff[3] != coeff[3]) ||(p.coeff[2] != coeff[2]) ||(p.coeff[1] != coeff[1]) ||(p.coeff[0] != coeff[0]) )
			return false;
		return true;
	}
	
	// Add
	public Polynomial add(Polynomial p)
	{
		return (new Polynomial(p.coeff[4]+coeff[4],p.coeff[3]+coeff[3],p.coeff[2]+coeff[2],p.coeff[1]+coeff[1],p.coeff[0]+coeff[0]));
	}

	// Derivative
	public Polynomial derive()
	{
		return (new Polynomial(coeff[4]*4,coeff[3]*3,coeff[2]*2,coeff[1],0));
	}

	// Evaluate
	public double evaluate(double x){
		return coeff[4]*x*x*x*x+coeff[3]*x*x*x+coeff[2]*x*x+coeff[1]*x+coeff[0];
	}

}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package star;

/**
 *
 * @author flashery
 */
import java.awt.Color;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import javax.swing.*;

public class StarAnimate extends JFrame implements ItemListener {

    JPanel panel = new JPanel();
    
    JRadioButton btnBoard1 = new JRadioButton("Board 1", true);
    JRadioButton btnBoard2 = new JRadioButton("Board 2");
    JRadioButton btnBoard3 = new JRadioButton("Board 3");
    
    Board board1 = new Board();
    Board2 board2 = new Board2();
    Board3 board3 = new Board3();

    public StarAnimate() {
        init();
    }

    private void init() {

        btnBoard1.setBounds(5, 10, 100, 30);
        btnBoard1.setBackground(Color.red);
        btnBoard1.addItemListener(this);

        btnBoard2.setBounds(5, 40, 100, 30);
        btnBoard2.setBackground(Color.red);
        btnBoard2.addItemListener(this);

        btnBoard3.setBounds(5, 70, 100, 30);
        btnBoard3.setBackground(Color.red);
        btnBoard3.addItemListener(this);

        panel.setLayout(null);
        panel.setBounds(0, 0, 160, 540);
        panel.setBackground(Color.red);

        panel.add(btnBoard1);
        panel.add(btnBoard2);
        panel.add(btnBoard3);


        this.add(panel);

        this.setDefaultCloseOperation(EXIT_ON_CLOSE);
        this.setSize(560, 540);
        this.setLayout(null);
        this.setLocationRelativeTo(null);
        this.setTitle("Star Animation");
        this.setResizable(true);
        this.setVisible(true);
    }

    public static void main(String[] args) {
        StarAnimate star = new StarAnimate();
    }

    @Override
    public void itemStateChanged(ItemEvent e) {

        if (e.getSource() == btnBoard1) {
            
            
            this.add(board1);
            this.remove(board2);
            this.remove(board3);
        }
        if (e.getSource() == btnBoard2) {
            this.add(board2);
            this.remove(board1);
            this.remove(board3);
        }
        if (e.getSource() == btnBoard3) {
            this.add(board3);
            this.remove(board2);
            this.remove(board1);
        }

    }
}