Java Scanner do-while Lack of Recognition Issue

Java Scanner do-while Lack of Recognition Issue

I have created a do-loop to continue iterating until the user enters a
word starting with Y or N, originally using a primitive check on a char
and now using the methods outlined below to check strings for equality.
With both comparison media, I found that even with 'y' or 'n' entered, the
loop would not exit. I cannot explain why, and hope that you can:
The following is the code:
do{
System.out.println("Please Enter a Valid y/n Reply:");
eraseOr_no = histScanner.next();
if(histScanner.hasNext()){
(eraseOr_no.replaceAll("\\s+", "")).toLowerCase();
character = Character.toString(eraseOr_no.charAt(0));
//DEBUGGING
System.out.println("CHECKPOINT 5" + "----" + character);
//DEBUGGING
}
}while(!(character.equals("n")) || !(character.equals("y")));
As is clear I have used a simply system to inform me of the value of the
String character, and as you may be able to see it is successfully
displaying the 'y' or 'n' meaning that my first-letter-retrieval code is
functioning, though the entire do structure is not.
Continue
Answer:
CHECKPOINT 4.0.
PLACEHOLDER
Please Enter a Valid y/n Reply:
y
y
CHECKPOINT 5----y
Please Enter a Valid y/n Reply:
y
CHECKPOINT 5----y
Please Enter a Valid y/n Reply:
n
CHECKPOINT 5----y
Please Enter a Valid y/n Reply:
y
CHECKPOINT 5----n
Please Enter a Valid y/n Reply:
Should I try to remove all whitespace? Am I missing something more
fundamental?