Java? Stopping after criteria has been met?

Question

Hi, I have this piece of code I have written;
num2 = Integer.parseInt(JOptionPane.showInputDialog("Enter second number"));
if (num1<0){
negative = ("You have entered a negative number!");
JOptionPane.showMessageDialog (null, negative);
num3 = Integer.parseInt(JOptionPane.showInputDialog("Enter third number"));
if (num1<0){
negative = ("You have entered a negative number!");
JOptionPane.showMessageDialog (null, negative);
if ((num1 == num2) && (num1 == num3))
result = ("Your triangle is equalateral, all sides are the same length!");
JOptionPane.showMessageDialog (null, result);
Everytime the user enters a negative number a message pops up saying "You have entered a negative number" BUT then it goes onto the second string and then third string.
I have 3 strings, e.g.
String 1 -> User enters 10
String 2 -> User enters -19 = You have entered a negative number
String 3 -> User enters 99
How can I get the program to stop after the "You have entered a negative number message? Thanx.

Answer 1

Hi,
How can I get the program to stop after the "You have entered a negative number message?{code}
If you want to terminate the currently running jvm use
{code}
System.exit(0);
{code}
Thanks