Overriding a variable

Question

Can I somehow override a string variable, for example, to int variable?
Something like that
String a = "5";
if (true) {
@Override int a = Integer.valueOf(a);
}
if (a instanceof Integer) System.out.print(" override done");
---
Basically I need to make clear whether user's input is a string or integer and use it afterwards.

Answer 1

No, this is not a way how overriding works in Java. But you can use Scanner class to parse the input.

Scanner sc = new Scanner(System.in);
if (sc.hasNextInt()) {
doSomething();
} else {
doSomethingElse();
}