can anyone tell my why this program bugs out when i enter more then 10 digits?

I wrote this program as an exercise, and although it appears to work fine, if I enter more then 10 digits it says illegal numeric format.

Can someone please tell me why it is doing this?

Code:

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import acm.program.ConsoleProgram;

public class countdigits extends ConsoleProgram {

public void run () {
        println ("this program counts the digits in a given number");
        int x = readInt ("enter number:");
        int y = 0;
println ("the number of digits in this number is: " + countInt(x, y));

}


        public int countInt (int x, int y) {
               
                int count = y;
                while (x > 0) {
                        x /= 10;
                        count++;
               
                }
                return count;

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Ask yourself the question: "what is the largest 'int' value there can be?" =)

An Integer's largest value can be ( 2^(31) ) - 1

You can get this value from

Code:

---

Integer.MAX_VALUE

---

If you want to be able to hold something larger, have a look at java.math.BigInteger


Mr. Beans

That makes perfect sense to me, thanks guys, I figured it was somthing obvious!