NumberFormatException is an exception that occurs when you try to convert a string into a numeric type (like int or double), but the string does not have the appropriate format for conversion.
Related terms
Parsing: The process of converting data from one representation (such as strings) into another representation (such as numbers).
Data validation: The process of checking if data meets certain criteria or constraints before using it.
Type casting: The act of converting one data type into another, often used when working with different types in programming languages.