issue with accepting user input [Java] [duplicate]

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• Issue with logic and Loop in Java 4 answers

My program creates an array and asks the user whether he wants to sort it or not by entering 'Y' or 'N'. When I enter anything as the input, it still says "Invalid Input"..

Code:

        do{
        System.out.println ("Do you want to sort your array? (Y/N)");
        System.out.print   ("> ");
        ch = br.readLine().toUpperCase();

        if(!ch.equals('N')||!ch.equals("Y")) System.out.println("Invalid Entry. Please Enter 'Y' or 'N'");
        else break;
    }while(true);

    if(ch.equals("N"))
    {
        System.out.println("Thank You.");
        return;
    }

OUTPUT:
Do you want to sort your array? (Y/N)
Y
Invalid Entry. Please Enter 'Y' or 'N'
Do you want to sort your array? (Y/N)