Practical-7 Develop a program that has only one button in the frame, clicking on the button cycles through the colors: red->green->blue and so on. One color changes per click.(use getBackGround() method to get the current color)

 

import java.awt.*;

import java.awt.event.*;

public class Practical7 implements ActionListener {

    Frame f;

    Button b;

    public Practical7()

    {

        f=new Frame("Practical-7");

        b=new Button("Click");

        b.setBackground(Color.red);

        b.addActionListener(this);

        f.setLayout(new FlowLayout());

        f.add(b);

        f.setSize(300,300);

        f.setVisible(true);

    }

    public static void main(String[] args)

    {

        Practical7 f1=new Practical7();

    }

    public void actionPerformed(ActionEvent e)

    {

        if(b.getBackground() == Color.RED)

        {

        b.setBackground(Color.GREEN);

        }

        else if(b.getBackground() == Color.GREEN)

        {

        b.setBackground(Color.BLUE);

        }

        else

        {

        b.setBackground(Color.RED);

        }

    }

}

Output: