How to convert String to LinkedList??

String with numbers only.

How do i create the two constructor methods LinkedListInteger(final String number){} & LinkedListInteger(final int number){} ??

class LinkedListInteger{ private List listNumber; private Boolean isNegative; public LinkedListInteger() { listNumber = new LinkedList(); isNegative = null; } public LinkedListInteger(final String number) { //converts the given string number into a LinkedListInteger /egative number is possible 1/ex: input to constructor is "543" // listNumber should be 5 -> 4 -> 3 -> null with isNegative set to false 1/ex: input to constructor is "-543" // listNumber should be 5 -> 4 -> 3 -> null with isNegative set to true } public LinkedListInteger(final int number) { //converts the given int number into a LinkedListInteger /egative number is possible //ex: input to constructor is 543 // listNumber should be 5 -> 4 -> 3 -> null with isNegative set to false 1/ex: input to constructor is -543 // listNumber should be 5 -> 4 -> 3 -> null with isNegative set to true }