JTextFields, getTexts as an integer?

[lord_pwnerer]

I want to get the text (numbers) from two text fields using a button which will inturn write the sum of both numbers into a third text field.

I'm having trouble with it. Assuming that all the components have been declared I think that there are two problems. First my variables are Strings, but second, I get an error saying that it is an invalid reference to inner class to try to find a non-local variable. Could someone please help me find a way around these two problems?

code:

JButton dB = new JButton ("Calculate Density"); dB.addActionListener(     new ActionListener() {         public void actionPerformed(ActionEvent e) {             String dM = dtxt1.getText();             String dV = dtxt2.getText();             String dD = dtxt3.setText(dM + dV);         }     } );

[wtd]

Can you please at least link to the full source code?

[lord_pwnerer]

yeah, sorry

code:

import java.awt.*; import java.awt.event.*; import javax.swing.*; public class densityProgram {     public static void densityWindow ()     {         try         {             UIManager.setLookAndFeel (UIManager.getSystemLookAndFeelClassName ());         }         catch (Exception e)         {         }         //Creates the frame, and sets close operation         JFrame w = new JFrame ("Density Calculator");         w.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);         //Creates a label which will mask the new frame         JLabel l = new JLabel ();         l.setPreferredSize (new Dimension (300, 300));         l.setOpaque (true);         l.setBackground (Color.black);         //Creates Buttons         JButton dB = new JButton ("Calculate Density");         JButton mB = new JButton ("Calculate Mass");         JButton vB = new JButton ("Calculate Volume");         JButton signin = new JButton ("Sign In");         //Creates numerous labels for the text fields         JLabel s = new JLabel (" ");         JLabel s1 = new JLabel (" ");         JLabel s2 = new JLabel (" ");         JLabel s3 = new JLabel (" ");         JLabel s4 = new JLabel (" ");         JLabel s5 = new JLabel (" ");         JLabel s6 = new JLabel (" ");         JLabel s7 = new JLabel (" ");         JLabel s8 = new JLabel (" ");         JLabel s9 = new JLabel (" ");         JLabel s10 = new JLabel (" ");         JLabel s11 = new JLabel (" ");         JLabel s12 = new JLabel (" ");         JLabel d1 = new JLabel ("Insert Mass");         JLabel d2 = new JLabel ("Insert Volume");         JLabel d3 = new JLabel ("Density : ");         JLabel v1 = new JLabel ("Insert Density");         JLabel v2 = new JLabel ("Insert Mass");         JLabel v3 = new JLabel ("Volume :");         JLabel m1 = new JLabel ("Insert Volume");         JLabel m2 = new JLabel ("Insert Density");         JLabel m3 = new JLabel ("Mass :");         JLabel p1 = new JLabel ("Insert Password");         JLabel u1 = new JLabel ("Insert Name");         //Creates numerous text fields         JTextField dtxt1 = new JTextField ("0", 10);         JTextField dtxt2 = new JTextField ("0", 10);         JTextField dtxt3 = new JTextField ("0", 10);         JTextField mtxt1 = new JTextField ("0", 10);         JTextField mtxt2 = new JTextField ("0", 10);         JTextField mtxt3 = new JTextField ("0", 10);         JTextField vtxt1 = new JTextField ("0", 10);         JTextField vtxt2 = new JTextField ("0", 10);         JTextField vtxt3 = new JTextField ("0", 10);         JTextField ptxt1 = new JTextField ("0", 10);         JTextField utxt1 = new JTextField ("0", 10);         //Creates a tabbed pane with panels         JTabbedPane tab = new JTabbedPane ();         JPanel d = new JPanel ();         JPanel m = new JPanel ();         JPanel v = new JPanel ();         //The Density Panel         d.setLayout (new BoxLayout (d, BoxLayout.Y_AXIS));         d.add (d1);         d.add (dtxt1);         d.add (s);         d.add (d2);         d.add (dtxt2);         d.add (s1);         d.add (dB);         d.add (s2);         d.add (d3);         d.add (dtxt3);         //The Mass Panel         m.add (m1);         m.add (mtxt1);         m.add (m2);         m.add (mtxt2);         //The Volume Panel         v.add (v1);         v.add (vtxt1);         v.add (v2);         v.add (vtxt2);         //The tabbed pane         tab.add (d, "Density");         tab.add (m, "Mass");         tab.add (v, "Volume");         //Adds components to frame         w.getContentPane ().add (l, BorderLayout.CENTER);         w.getContentPane ().add (tab, BorderLayout.CENTER);         //         w.pack ();         w.setVisible (true);         w.setResizable (false);         w.setSize (300, 300);     }     public static void main (String[] args)     {         javax.swing.SwingUtilities.invokeLater (new Runnable ()         {             public void run ()             {                 densityWindow ();             }         }         );     } }

As you can see, the formatting isn't the best so if someone could please explain how to make it better to me that would be a great help also.