Cannot convert all hex values to binary

Question

Scanner scanner = new Scanner(System.in);
String input = scanner.nextLine();
System.out.println(input);
int a = Integer.parseInt(input.substring(2), 16);
System.out.println(Integer.toBinaryString(a));

Above mentioned code that takes in hex value and convert it into binary. However, this would not work on input "0xBE400000" but it works fine for "0x41C20000"

Answer 1

BE400000 is larger than Integer.MAX_VALUE (whose hex representation is 7FFFFFFF).

Therefore you'll need to parse it with

long a = Long.parseLong(input.substring(2), 16);