Can we read and compare the value from the console in a single line?

Following is the piece of code i have used in c/c++ which is fairly simple:

while ((scanf_s("%d", &num) == 1)&&num>0)

Below is the usual java code to read input:

try(Scanner n1 = new Scanner(System.in))
    {
        System.out.println("Enter the  number of days");
        while(n1.hasNextInt())
        {
            days = n1.nextInt();
            //some stmts
            n1.nextLine();
        }
    }

How can use this while to read the input as well as compare the value in a single "while" like i can do in c and c++;