parseint - w3toppers.com

Why is JSON invalid if an integer begins with a leading zero?

A leading 0 indicates an octal number in JavaScript. An octal number cannot contain an 8; therefore, that number is invalid. Moreover, JSON doesn’t (officially) support octal numbers, so formally the JSON is invalid, even if the number would not contain an 8. Some parsers do support it though, which may lead to some confusion. … Read more

Java: parse int value from a char

Try Character.getNumericValue(char). String element = “el5”; int x = Character.getNumericValue(element.charAt(2)); System.out.println(“x=” + x); produces: x=5 The nice thing about getNumericValue(char) is that it also works with strings like “el٥” and “el५” where ٥ and ५ are the digits 5 in Eastern Arabic and Hindi/Sanskrit respectively.