how to retrieve data from multiple JTextField - jtextfield

Question

we are creating a project in netbeans which needs to read data from 3 JTextFields in order for us to use it in equations to solve a problem here the part we already finished:
package combustionofgaseousfuels;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class CombustionOfGaseousFuels extends JFrame
{
private JTextField C;
private JTextField H;
private JTextField Excess;
private JTextField Answer;
private JTextField Theo;
private JPanel panel1;
private JPanel panel2;
private JPanel panel3;
private JPanel panel4;
private JPanel panel5;
private JLabel label1;
private JLabel label2;
private JLabel label3;
private JLabel label4;
private JLabel label5;
private JLabel label6;
private JLabel label7;
private ButtonGroup rad1;
private JRadioButton ORSAT;
private JRadioButton WET;
private JRadioButton BOTH;
private JRadioButton c4;
private JRadioButton c5;
public CombustionOfGaseousFuels()
{
super("Flue Gas Analyzer");
ORSAT= new JRadioButton("ORSAT Analysis",false);
WET= new JRadioButton("Wet Analysis",false);
BOTH= new JRadioButton("Both",false);
rad1= new ButtonGroup();
rad1.add(ORSAT);
rad1.add(WET);
rad1.add(BOTH);
panel1=new JPanel();
panel1.setLayout(new GridLayout(1,3));
panel1.add(ORSAT);
panel1.add(WET);
panel1.add(BOTH);
label1= new JLabel("Enter the Number of Carbon and Hydrogen in Your Fuel:");
label2= new JLabel("C:");
label3= new JLabel("H:");
label4= new JLabel("How Much is the %Excess Air?");
label5=new JLabel("Your Flue Gas Analysis is:");
label6=new JLabel("The Theoretical O2 is:");
label7=new JLabel("What Flue Gas Analysis Do You Want?");
C=new JTextField(5);
C.addActionListener(
new ActionListener(){
#Override
public void actionPerformed(ActionEvent event)
{
int carbon;
carbon= Integer.parseInt( ( (JTextField)
event.getSource()).getText());
H=new JTextField(5);
H.addActionListener(
new ActionListener(){
#Override
public void actionPerformed(ActionEvent event)
{
int hydrogen;
hydrogen=Integer.parseInt(((JTextField)
event.getSource()).getText());
Excess= new JTextField(5);
Excess.addActionListener(
new ActionListener(){
#Override
public void actionPerformed(ActionEvent event)
{
int excess;
excess=Integer.parseInt(((JTextField)
event.getSource()).getText());
{
if (ORSAT.isSelected()){
//double c = Integer.parseInt( carbon );
//double h = Integer.parseInt( hydrogen );
//double x = Integer.parseInt( excess );
double tc = (carbon*1);
double th = (hydrogen*1);
double tx = (excess/100);
double theo = tc + (th/4);
double xs = tx * theo;
double osupplied = (1+ tx)* theo;
double n = 3.761904762 * osupplied;
double total = (tc) + xs + n;
double carbondioxide = ((tc)/ total)*100;
double nitrogen = (n/ total)*100;
double oxygen = (xs/total)*100;
Answer.setText(String.valueOf(total));
}
}
}
});
}
});
}
});
Answer=new JTextField(10);
Answer.setEditable(false);
Theo=new JTextField(10);
Theo.setEditable(false);
Container project=getContentPane();
project.setLayout(new GridLayout(15,1));
project.add(label1);
project.add(label2);
project.add(C);
project.add(label3);
project.add(H);
project.add(label4);
project.add(Excess);
project.add(label7);
project.add(panel1);
project.add(label5);
project.add(Answer);
project.add(label6);
project.add(Theo);
setSize (400,300);
setVisible(true);
}
public static void main(String[] args)
{
CombustionOfGaseousFuels analyzer=new CombustionOfGaseousFuels();
analyzer.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
There is no error in the codes but when we try to run it, it shows some errors, .please help us in pursuing our project.

Answer 1

public class CombustionOfGaseousFuels extends JFrame
{
private JTextField C;
private JTextField H;
private JTextField Excess;
private JTextField Answer;
private JTextField Theo;
private JPanel panel1;
private JPanel panel2;
private JPanel panel3;
private JPanel panel4;
private JPanel panel5;
private JLabel label1;
private JLabel label2;
private JLabel label3;
private JLabel label4;
private JLabel label5;
private JLabel label6;
private JLabel label7;
private ButtonGroup rad1;
private JRadioButton ORSAT;
private JRadioButton WET;
private JRadioButton BOTH;
private JRadioButton c4;
private JRadioButton c5;
public CombustionOfGaseousFuels()
{
super("Flue Gas Analyzer");
ORSAT= new JRadioButton("ORSAT Analysis",false);
WET= new JRadioButton("Wet Analysis",false);
BOTH= new JRadioButton("Both",false);
rad1= new ButtonGroup();
rad1.add(ORSAT);
rad1.add(WET);
rad1.add(BOTH);
panel1=new JPanel();
panel1.setLayout(new GridLayout(1,3));
panel1.add(ORSAT);
panel1.add(WET);
panel1.add(BOTH);
label1= new JLabel("Enter the Number of Carbon and Hydrogen in Your Fuel:");
label2= new JLabel("C:");
label3= new JLabel("H:");
label4= new JLabel("How Much is the %Excess Air?");
label5=new JLabel("Your Flue Gas Analysis is:");
label6=new JLabel("The Theoretical O2 is:");
label7=new JLabel("What Flue Gas Analysis Do You Want?");
C=new JTextField(5);
H=new JTextField(5);
Excess= new JTextField(5);
C.addActionListener(
new ActionListener(){
#Override
public void actionPerformed(ActionEvent event)
{
final int carbon;
carbon= Integer.parseInt( ( (JTextField)
event.getSource()).getText());
H.addActionListener(
new ActionListener(){
#Override
public void actionPerformed(ActionEvent event)
{
final int hydrogen;
hydrogen=Integer.parseInt(((JTextField)
event.getSource()).getText());
Excess.addActionListener(
new ActionListener(){
#Override
public void actionPerformed(ActionEvent event)
{
int excess;
excess=Integer.parseInt(((JTextField)
event.getSource()).getText());
{
if (ORSAT.isSelected()){
//double c = Integer.parseInt( carbon );
//double h = Integer.parseInt( hydrogen );
//double x = Integer.parseInt( excess );
double tc = (carbon*1);
double th = (hydrogen*1);
double tx = (excess/100);
double theo = tc + (th/4);
double xs = tx * theo;
double osupplied = (1+ tx)* theo;
double n = 3.761904762 * osupplied;
double total = (tc) + xs + n;
double carbondioxide = ((tc)/ total)*100;
double nitrogen = (n/ total)*100;
double oxygen = (xs/total)*100;
Answer.setText(String.valueOf(total));
}
}
}
});
}
});
}
});
Answer=new JTextField(10);
Answer.setEditable(false);
Theo=new JTextField(10);
Theo.setEditable(false);
Container project=getContentPane();
project.setLayout(new GridLayout(15,1));
project.add(label1);
project.add(label2);
project.add(C);
project.add(label3);
project.add(H);
project.add(label4);
project.add(Excess);
project.add(label7);
project.add(panel1);
project.add(label5);
project.add(Answer);
project.add(label6);
project.add(Theo);
setSize (400,300);
setVisible(true);
}
public static void main(String[] args)
{
CombustionOfGaseousFuels analyzer=new CombustionOfGaseousFuels();
analyzer.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}

Answer 2

You should define H and Excess outside the C.addActionListener. Just try putting
H=new JTextField(5);
Excess= new JTextField(5);
just after
C=new JTextField(5);