Number Format Exception
时间: 2023-12-17 16:04:39 浏览: 27
NumberFormatException is a type of exception in Java which is thrown when you are trying to convert a string into a numeric format (int, float, double, etc.), but the string is not a valid numeric value. This can happen if the string contains non-numeric characters or if it is empty.
For example, if you try to convert the string "abc" into an integer using the Integer.parseInt() method, you will get a NumberFormatException because "abc" is not a valid integer.
To avoid this exception, you should always validate the input before trying to convert it into a numeric format. You can use regular expressions to check if the string contains only numeric characters or you can use try-catch blocks to handle the exception gracefully.