prompting the user to enter a valid value in an applet
hi everyone!
i have this code and i want to prompt the user to set a value<1000.
this doesnt work.if i enter a value <1000 the input dialog appears again.
whats wrong?
publicvoid init()
{
String j = JOptionPane.showInputDialog(null,"Enter a number less than 1000 but greater than 0");
int i = Integer.parseInt(j);
while(i>1000||i<1)
{
String k = JOptionPane.showInputDialog(null,"Enter a number less than 1000 but greater than 0");
int y = Integer.parseInt(k);
}
....code executedwhile i<1000 or i>0
Your while is looping on i, but inside you're setting y not i. This should work:
do {
String k = get input from option pane
int i = Integer.parseInt(k);
} while (i > 1000 || i < 1);
> Your while is looping on i, but inside you're setting
> y not i. This should work:
>
> > do {
>String k = get input from option pane
> int i = Integer.parseInt(k);
> } while (i > 1000 || i < 1);
>
In BinaryDigit's code, you won't have access to "i" after the loop. Declare it outside the loop (as you had it).
> int i = 0;
do {
String k = get input from option pane
i = Integer.parseInt(k);
} while (i > 1000 || i < 1);
MLRona at 2007-7-14 19:33:53 >
> yes now it works. but i wonder why i have no access to i if i declare it into the do-while statement?If you declare "i" inside the do-while statement, the scope ends when the do-while ends. The scope of a variable declared after a { somewhere ends at the matching }.
MLRona at 2007-7-14 19:33:53 >
