Too many
while
loops, and the expression on the last one is wrong, it should be:
while ((!input.equals("register")) && (!input.equals("login"))) {
System.out.println("invild option, chose login or regiser!");
input = scanner.nextLine();
A better way would be a single do/while loop, something like:
do
{
System.out.println("Enter \"login\", \"register\", or \"exit\"");
input = scanner.nextLine();
if (input.equals("login")
{
}
else if (input.equals("register")
{
}
else if (input.equals("exit")
{
break;
}
else
{
}
} while (true);