Button's action event in Head first java

[Dinesh Kumar Tadepalli]

I was trying to run the program on pg 360 (head first java) but it gives me a "main" exception. the compiler says it cannot find a main class.

The code is as follows:

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

public class SimpleGui1B implements ActionListener {
	JButton button;	
	public static void main(String[] args) {
		SimpleGui1B gui = new SimpleGui1B();
		gui.go();
	}
	
	public void go() {
		JFrame frame = new JFrame();
		button = new JButton("click me");
		
		button.addActionListener(this);
		
		frame.getContentPane().add(button);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setSize(400,400);
		frame.setVisible(true);
	}
	
	public void actionPerformed(ActionEvent event) {
		button.setText("I've been clicked!");
	}
}

Can someone help me what went wrong and why is not able to compile?

thanks

[Dinesh Kumar Tadepalli]

sorry... i realized my mistake...

i said java SimpleGui1B.java instead of javac SimpleGui1B.java

thanks