Modify a value inside a while loop java

I have a runnable with this code inside it

public void run() {
    while(enabled) {
        long wait = 50000000L;
        System.out.println(wait);
    }
}

I have no access to the following code, but I want to modify the wait value(make the it tick faster, this is just a simplified version of it)

Edit: I need to modify it during runtime, and I know about reflection I just don't know if you can use it in this case