一元运算符，

class UnaryDemo {/*来 自 nowjava - 时  代  Java*/


    public static void main(String[] args) {


        int result = +1;

        // result is now 1

        System.out.println(result);


        result--;

        // result is now 0

        System.out.println(result);


        result++;

        // result is now 1

        System.out.println(result);


        result = -result;

        // result is now -1

        System.out.println(result);


        boolean success = false;

        // false
        /*
        nowjava - 时  代  Java
        */

        System.out.println(success);

        // true

        System.out.println(!success);

    }

}