bmi calculation help please!

[Sarah Ingram]

Hi,
I am trying to create a Body Mass Index page, but keep on getting this same error:
C:\BMI.java:147: int cannot be dereferenced
bmi.setText(""+bmi);
^
1 error

I have tried to sort it but have been unsuccessful. Please can someone help me spot the error(s)! Thanks in advance.
Code is below:

 
import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
/**
 * Calculates Body Mass Index for a patient
 * considering the height(in m) and weight (in Kg)
 *
 */
 
 public class BMI extends JFrame
 {
 private JPanel JPanel1;
 
 private JLabel header;
 private JLabel age;
private JLabel JLabel2;
private JLabel JLabel3;
private JLabel JLabel4;
 private JButton JButtonAnalyse;

private JTextField JTextField1;
private JTextField weight;
private JTextField height;
private JTextField bmi;
 
// Create the GUI for the Body Mass Index
// calculation screen and add WindowListener to listen 
// when a calculation needs to be made


public BMI() 
{
initComponents();
}

private void initComponents() 
{
JPanel1 = new JPanel();
header = new JLabel();

age = new JLabel();
JTextField1 = new JTextField();
JLabel2 = new JLabel();
weight = new JTextField();

JLabel3 = new JLabel();
height = new JTextField();

JLabel4 = new JLabel();
bmi = new JTextField();
 
 JButtonAnalyse = new JButton();
 
 getContentPane().setLayout(null);

setTitle("Body Mass Index");
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
exitForm(e);
}
});
 
 
 // Add Title and Analyse Button with ActionListener

header.setFont(new java.awt.Font("Arial", 1, 16));
header.setText("Body Mass Index");
getContentPane().add(header);
header.setBounds(390, 10, 290, 50);


JButtonAnalyse.setText("Analyse");
JButtonAnalyse.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
JButtonAnalyseActionPerformed(e);
}
});

getContentPane().add(JButtonAnalyse);
JButtonAnalyse.setBounds(860, 364, 95, 30);



// Age Field and Label
age.setText("Age:");
getContentPane().add(age);
age.setBounds(380, 192, 80, 16);

getContentPane().add(JTextField1);
JTextField1.setBounds(465, 190, 130, 20);


// Weight Field and Label
JLabel2.setText("Weight (kg):");
getContentPane().add(JLabel2);
JLabel2.setBounds(380, 232, 80, 16);

getContentPane().add(weight);
weight.setBounds(465, 230, 130, 20);


// Height Field and Label
JLabel3.setText("Height (m):");
getContentPane().add(JLabel3);
JLabel3.setBounds(380, 272, 80, 16);

getContentPane().add(height);
height.setBounds(465, 270, 130, 20);

// Body Mass Index Field and Label
JLabel4.setText("BMI:");
getContentPane().add(JLabel4);
JLabel4.setBounds(380, 332, 80, 16);

getContentPane().add(bmi);
bmi.setBounds(465, 330, 130, 20);
 
setExtendedState(Frame.MAXIMIZED_BOTH);
 }
   
 private void JButtonAnalyseActionPerformed(ActionEvent ev)  
 { calculatebmi(); }
 
 
     void calculatebmi() {
        double kilograms = Double.parseDouble(weight.getText());
        double meters    = Double.parseDouble(height.getText());
        int bmi = (int)(kilograms / (meters*meters));
        bmi.setText(""+bmi);
    }
 
 // Exiting
 
private void exitForm(WindowEvent e) 
{System.exit(0);}
public static void main(String args[]) {
new BMI().setVisible(true);
}
 }
 

[Ted Reynolds]

Sarah,
I got it to wrok by changing the name of the variable you use to do the actual calulation to bmiValue. My theory on why it didn't work the way you had it was that you had a textfield and an integer with the same name and this confused the compiler.

[Sarah Ingram]

Thanks very much Ted...you were right about the compiler getting confused with all the similar names. Works just fine now!
Thanks

[Eddie Vanda]

You could have used "this.bmi.setText(""+bmi);" as that it would refer to the class variable bmi.