Java programming 1

Expert:Kaito
thx sir for reply me..but sir can u pls simplify it? cos the answer is not up to my requirement regarding the BMI index programming
...n i jus learn until simple method not further method yet..haha

Answers

Hi friend,

1. Ask the user for their height. Convert it to a double.
2. Ask the user for their weight. Convert it to a double.
3. Use the formula BMI = weight / (height * height) to calculate the BMI.
4. Display the BMI number along with a message about their weight. These are the National Institute of Health official categories, but it might be more interesting to create your own messages.
* Underweight for BMI < 18.5
* Normal for BMI from 18.5 up to 25
* Overweight for BMI from 25 to 30
* Obese for BMI over 30
------------------------------------

Here is the code.

import javax.swing.JFrame;

class BMI {
public static void main(String[] args) {
JFrame frame = new JFrame("Body Mass Index");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setContentPane(new BMIPanelDemo());
frame.setSize(300,200);
frame.setVisible(true);
}
}

------------------------------------------------------

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

class BMIPanelDemo extends JPanel {
private JTextField m_mField = new JTextField(4); // height
private JTextField m_kgField = new JTextField(4); // weight
private JTextField m_bmiField = new JTextField(4); // BMI

BMIPanelDemo() {
//Create button and add an action listener
JButton bmiButton = new JButton("Compute BMI");
bmiButton.addActionListener(new BMIListener());

//Set layout and add components.
this.setLayout(new FlowLayout());
this.add(new JLabel("Weight in kilograms"));
this.add(m_kgField);
this.add(new JLabel("Height in meters"));
this.add(m_mField);
this.add(bmiButton);
this.add(new JLabel("Your BMI is"));
this.add(m_bmiField);
}

private class BMIListener implements ActionListener {
public void actionPerformed(ActionEvent e) {
double kilograms = Double.parseDouble(m_kgField.getText());
double meters = Double.parseDouble(m_mField.getText());
int bmi = (int)computeBMI(kilograms, meters);
m_bmiField.setText("" + bmi);
}
}

public static double computeBMI(double weight, double height) {
return weight / (height*height);
}
}
----------------------------------

Thanks.

More Questions

Post Answers

Ask Question Facing Programming Problem?