Try Catch - Help

[millarAJ]

[CODE=Java]public static int getQtyInStock()
{
int qtyInStock=0;
boolean ok;
do
{
ok=true;
try
{
p("\n\t Qty in Stock : ");qtyInStock=k ey.nextInt();ke y.nextLine();
}
catch (InputMismatchE xception ex)
{
p("NON NUMERIC DATA HAS BEEN DETECTED - PLEASE RE-ENTER USING NUMERIC DATA ONLY!");
ok=false;
}
catch(NumberFor matException ex)
{
p("NON NUMERIC DATA HAS BEEN DETECTED - PLEASE RE-ENTER USING NUMERIC DATA ONLY!");
ok=false;
}
}while(!ok);

return qtyInStock;
}

[/CODE]

can anyone tell me why I am getting an infinite loop-----one of those days!

[BigDaddyLH]

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[JosAH]

Suppose you type 'foo' when the program expects an integer; none of the characters
are read, and exception is thrown, you catch it and print a message and try to
read an integer again. There isn't any available ('foo' is still in the input buffer)
and there the game repeats over and over again.

kind regards,

Jos

[BigDaddyLH]

If input is not an int, key.nextInt() blows up. When it blows up it leaves the input stream the way it found it and your code is repeatedly calling this method. Hence, inifinite loop.

Suggestion: In this simple situation, Scanner isn't helping. Read input one line at a time with a BufferedReader and parse the line read.