java.lang.ArrayIndexOutOfBoundsException: Index 0 out of bounds for length 0 at IMEI.main(IMEI.java:10)

This error message indicates that an array was accessed with an index of 0, but the array has a length of 0, meaning it is empty. Therefore, there is no element at index 0 and attempting to access it results in an ArrayIndexOutOfBoundsException.

To fix this error, you need to make sure that the array has at least one element before accessing it. You can do this by checking the length of the array before accessing it, or by initializing the array with at least one element before using it.