GUI and Strings

[Graham Robinson]

Can't work out how to take them in, I've had it so it will work out the pounds to kilos, but can't seem to send it down. I've tried a few different strimgs etc, here is the code.

import element.*;
import javax.swing.JOptionPane;
 
public class WeightConversion
{
public static void main (String [] args)
{
 
//variable
double pound, kilo;
int count = 0;
String p = new String();
String k = new String();
 
//loop begin
do
{
String name =
JOptionPane.showInputDialog( null, "Please enter p to convert from pounds to kilos\n Or k to convert from kilos to pounds.");
String pounds = new String();
String kilos = new String(name);
count++;
if(name == p)
{
String firstNumber1 =
JOptionPane.showInputDialog( null, "Please input weight in pounds to be converted into kilos.");
int lbs = Integer.parseInt( firstNumber1);
kilo = lbs * .45359237;
JOptionPane.showMessageDialog( null, "Weight = "+kilo+" Kg\n");
}
if(kilos == k)
{
String secondNumber =
JOptionPane.showInputDialog( null, "Please input weight in KG to be converted into pounds.");
int kg = Integer.parseInt( secondNumber);
pound = kg * 2.20462262;
JOptionPane.showMessageDialog( null, "Weight = "+pound+" lbs\n");
}
else
JOptionPane.showMessageDialog( null, "??","Go away please", JOptionPane.PLAIN_MESSAGE);
 

} while (count <=1000);//loop end.
 

}//end class
}//end main
 

[Joanne Neal]

Use String.equals() method to compare Strings, not ==
eg

if(name.equals(p))

[Murad Iqbal]

1. What are you comparing 'name' and 'kilo' with? 'p' and 'k' are empty strings isnt it? So I suggest initialize them with something you would want to compare them with

2. As told earlier, for String comparison use .equals() method from the String class.

[Graham Robinson]

Cheers, it works.