是否可以在while循环中分配变量？

Question

I'm looking for a way to use scanner in a while loop, without advancing twice.

String desc = "";
while (!scanner.next().equals("END")) {
    desc = desc + scanner.next();
}           

As you can see, when scanner.next() is called in the while loop's condition and inside of the while loop itself. I want it to advance the scanner only once. Is there any way to do that?

Answer 1

Yes it is possible. You should also check that the Scanner has more tokens in its input

String desc = "";
String next = null;
while (scanner.hasNext() && !(next = scanner.next()).equals("END")) {
    desc = desc + next;
}

Answer 2

    String temp = "";
    do {
        desc = desc + temp;
        temp = scanner.next();
    } while(!temp.equals("END"))

You can use a do-while for post loop condition checking