[RESOLVED] Try / Catch question

[Planet_x]

In my program I have multiple readLines for the user to enter in numbers, how would I do a try / catch to catch if they enter something other than a number? Could I just use one throw statement for all of them? Any help appreciated, thanks.

System.out.println("Enter Inventory Number : ");
inventoryNumber = Integer.parseInt(reader.readLine());

[killer7k]

If I get what you want

try {
            System.out.println("Enter Inventory Number : ");
int inventoryNumber = Integer.parseInt(reader.readLine());
 
        }
    catch (Exception ex){
        System.out.println("Enter a Number");
    }

[ComputerJy]

Since you're using Integer.parseInt I assume you're trying to read an integer number. killer7k's code works fine but why wait for the JVM to throw the exception, which is always a bad idea you can do it in one of 2 ways:

Scanner s = new Scanner(System.in);
inventoryNumber = s.nextInt();

Or

Scanner s = new Scanner(System.in);
String userInput = s.nextLine();
if (userInput.matches("\\d+")) {
    inventoryNumber = Integer.parseInt(userInput);
} else {
    System.err.println("Please enter an integer number");
}

The first way is better, the second is only for using the nextLine method.

Oh and BTW use the Scanner class to read user input, it's easier to use and much safer