Failed to convert value of type javalangString to required type int; nested exception is javalangNumberFormatException For input string

This error occurs because you are trying to convert a string value to an integer, but the string is empty or blank. The NumberFormatException is thrown when the string cannot be parsed as a number.

To fix this issue, you can add a check to ensure that the string is not empty before converting it to an integer. For example:

String stringValue = ""; // The string value you are trying to convert
int intValue;

if (!stringValue.isEmpty()) {
    intValue = Integer.parseInt(stringValue);
} else {
    // Handle the case when the string is empty
}

By adding the if condition, you can avoid the NumberFormatException when the string is empty