Cannot find symbol class (Java swing)

[JanineXD]

Hey,

I seem to have a problem on a Java Swing Program with ActionListener. I've tried to use getSource in our class but seem don't have an idea why it won't work when I tried to program at home. ( I'm using an earlier version of JCreator in school and a JCreator Pro here at home, Does that affect the program at all? )

Here's the code:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
 
public class Group2 extends JFrame implements ActionListener{
 
public void Group2(){
        JLabel text = new JLabel("Enter a number to partition: ");
        JTextField input = new JTextField(15);
         JButton submit=new JButton("Submit");
        String listboxitems[]={"5","1111111","111111111","1111111111"};
        JList listbox = new JList(listboxitems);
        JLabel timeprocessed=new JLabel("It x milliseconds to process the output");
           setSize(350, 250);
        setTitle("Group 2 COPRO2 & DATASTRUCT Project");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
          FlowLayout layoutManager = new FlowLayout(FlowLayout.CENTER);
        layoutManager.setHgap(10);
        layoutManager.setVgap(10);
        setLayout(layoutManager);
        getContentPane().setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
        getContentPane().add(text);
        getContentPane().add(input);
        getContentPane().add(submit);
        getContentPane().add(listbox);
        getContentPane().add(timeprocessed);
        submit.addActionListener(this);
}
public void actionPerformed(ActionEvent ae){
if(ae.getSource()==submit){
        timeprocessed.setVisible(true);}
else{
System.out.println("error");
}
         }
 
    public static void main(String[] args) {
        new Group2().setVisible(true);
}
 
 
}

The error text:

C:\Documents and Settings\User\Desktop\Group2.java:31: cannot find symbol
symbol  : variable submit
location: class Group2
if(ae.getSource()==submit){
                   ^
C:\Documents and Settings\User\Desktop\Group2.java:32: cannot find symbol
symbol  : variable timeprocessed
location: class Group2
        timeprocessed.setVisible(true);}
        ^
2 errors

Thank You!

[Nepomuk]

This looks like a scope problem. Try defining the Objects submit and timeprocessed outside of the constructor and just initializing them inside:

 //...
 
 private JButton submit;
private JLabel timeprocessed;
 
public class Group2 extends JFrame implements ActionListener{
 
public void Group2(){
        //...
        submit=new JButton("Submit");
        String listboxitems[]={"5","1111111","111111111","1111111111"};
        JList listbox = new JList(listboxitems);
        timeprocessed=new JLabel("It x milliseconds to process the output");
        //...
}
public void actionPerformed(ActionEvent ae){
if(ae.getSource()==submit){
        timeprocessed.setVisible(true);}
else{
System.out.println("error");
}
         }
    //...
}

Greetings,
Nepomuk