I want to enter a float value and the unit for a Tmeperature object but
when not given, want to use default values.  So I am testing default
constructor but do not know how to handle Scanner when no input.

Here is the code; the program hangs waitng for input.  Any help
appreciated.

   float temp1=0;
   Scanner keyboard1 =  new Scanner(System.in);
   System.out.println("Enter a float value with 2 decimal position for
a temperature.");
   if (keyboard1.hasNextFloat())
        temp1 = keyboard1.nextFloat();
   else
    keyboard1.skip("");

   String strScale1 ="C";
   System.out.println("Enter one character for degree scale (C or
F).");
   if (keyboard1.hasNext())
       strScale1 = keyboard1.next();
   else
    keyboard1.skip("");
   
   char scale1 = (strScale1.toUpperCase()).charAt(0);