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Integer.parseInt(String) doesn't accept non-numeric input, including nulls and empty strings. Either guard against that like you suggested, or catch the NFE.
25 Ιουλ 2024 · Description. The parseInt function converts its first argument to a string, parses that string, then returns an integer or NaN. If not NaN, the return value will be the integer that is the first argument taken as a number in the specified radix.
30 Δεκ 2020 · The catch statement actually catches all errors that come its way, and sometimes we might not want that. For example, "use strict" let x= parseInt (prompt("input a number less than 5")) try { y=x-10 if (y>= 5) throw new Error (" y is not less than 5") else alert(y) } catch (e){ alert(e) }
25 Σεπ 2023 · Baseline Widely available. The Number.parseInt() static method parses a string argument and returns an integer of the specified radix or base.
18 Φεβ 2022 · public static int parseInt(String s, int radix) throws NumberFormatException. This function parses the string argument as a signed integer in the radix specified by the second argument. Return Type: In simple words, both methods convert the string into its integer equivalent.
NumberFormatException is a runtime exception in Java that signals an attempt to convert a string into a number, but the string does not have the appropriate format. This typically occurs when using methods like Integer.parseInt() or Double.parseDouble() on strings that don't represent valid numbers.
