Help with running app from dos in xp

Question

Hi everybody i am having a little trouble with adjusting the CLASSPATH of the JRE in XP it seems because i am trying to compile this program
import javax.swing.JOptionPane;
public class addition {
public static void main (String[]args)
     String firstnumber,secondnumber;
     int number1,number2,sum;
     firstnumber=JOptionPane.showInputDialog=("Enter number ");
     number1= Int.parseInt(firstnumber);
     secondnumber=JOptionPane.showInputDialog ("enter second number");
     number2=Int.parseInt(secondnumber);
     sum=number1+number2;
     JOptionPane.showMessageDialog=(null,"result " + sum,"The result is",PLAIN_MESSAGE);
by using javac command but i always get the maessage ('javac' is not recognised as an internal or external command operable program or batch file).
Maybe i have set the CLASSPATH wrong or i am not using the 'javac' properly.\
Please help thanks in advance :)

Answer 1

yeah need to change PATH
for XP open up the control panel -> then click on system -> then the advanced tab
there should be an enviroment variables button at the bottom, click on it and find the PATH variable:
you need to add the bin directory to the value of PATH.
do this by adding the path of the bin directory at the end of what is alreday there, remeber to separate paths with semi-colons, ';'.
eg if you installed j2sdk on a drive D:
then you would add "; D:\j2sdk\bin" to the value of PATH (obviously without the quotes)
hope this help
ste