Setting label text

Question

Can anybody tell me what is wrong with this code. The following error message is shown at the compile time.
local variable l is accessed from within inner class; needs to be declared final
How can I fix it.
import javax.swing.*;
import java.awt.event.*;
public class ButtonText{
public static void main(String args[]){
JButton b = new JButton("Press Me!");
b.setText("Me Press!");
JLabel l = new JLabel(b.getText());
b.addActionListener(
new ActionListener(){
public void actionPerformed(ActionEvent e){
l.setText(e.getActionCommand());
JFrame f = new JFrame();
JPanel p = new JPanel();
p.add(b);
p.add(l);
f.getContentPane().add(p);
f.pack();
f.setVisible(true);
}

Answer 1

You are accessing a local variable, the JLabel I, from an anonymous inner class created in your addActionListener() call. You need to put the word final in your declaration of the JLabel I, as follows:
final  JLabel l = new JLabel(b.getText());I have not tested this, and would need to research why this needs to be done. Probably to prevent the JLabel I from being lost when the method terminates.
You could also probably move your declaration of JLabel I to be an instance variable, and initialized it where you currently do.
� {�