Can someone please help me with this programming problems?

Don't have Java compiler on this computer but I think this should do it. Also, I don't know of a standard Keyboard class in Java, so I assume you are allowed to keep this. Otherwise you would have to instantiate a buffered reader of some sort to get keyboard input.

(Had to put some stuff on multiple lines because Yahoo! answers was cutting it off).


// program to calculate Body Mass Index (BMI)
public class CalculateBMI {
public void start() {

System.out.print("Enter your weight in Kilograms: ");
double weight = Double.parseDouble(
  Keyboard.readInput());
System.out.print("Enter your height in Metres: ");
double height =
  Double.parseDouble(Keyboard.readInput());
double bodyMassIndex = weight / height * height;
System.out.print("Your BMI is: ");
System.out.println(
  Math.round(bodyMassIndex));

}
}

This should work with main function...

import java.io.*;

// program to calculate Body Mass Index (BMI)
public class CalculateBMI {
public void start() {

try {

InputStreamReader inp = new InputStreamReader(System.in);
BufferedReader br = new BufferedReader(inp);

System.out.print("Enter your weight in Kilograms: ");
Double weight = Double.parseDouble(br.readLine());
System.out.print("Enter your height in Metres: ");
double height = Double.parseDouble(br.readLine());
double bodyMassIndex = weight / (height * height);
System.out.print("Your BMI is: ");
System.out.println(Math.round( bodyMassIndex));

} catch (IOException e) {
e.printStackTrace();
}
}

public static void main(String[] a) {
CalculateBMI cb = new CalculateBMI();
cb.start();
}

}