code error

[Brad Cantrell]

This code brings up "cant find symbol" errors for lines 5, 12, 13 and 18 for classes JFrame and JButton. I just cant find whats wrong.

import java.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(300,300);
        frame.setVisible(true);
    }
    
    public void actionPerformed(ActionEvent event) {
        button.setText("I've been clicked!");
    }
}  

[Ernest Friedman-Hill]

Hi Brad,

There's no such package as "java.swing" -- it's actually "javax.swing".

[Brad Cantrell]

Thanks Ernest