5. Another Example



Answer:
Not in this example. But sometimes it does, when values are close to the limit of what can be represented in 16 bits.









Another Example



    

        

        

        
Here is another example:

        

    





    

        

        

        

            
short x = 12;
short y = 3;
short value;

value = x / y;

        

        

    





    

        

        

        

            
The expression   x / y   divides a 32-bit value 12 by a 32-bit value 3, even though the variables x and y are only 16 bits wide. The calculation produces a 32-bit
                result. Because the 32-bit result does not fit in the 16 bits of value the compiler will not compile the last statement. This can be completely baffling when it happens to you.

        

        

            
                

                

                

                    
                        
C:\Private>javac ShortStuff.java
ShortStuff.java:9: possible loss of precision
found   : int
required: short
    result = x / y;
               ^
1 error
C:\Private>

                    		
                

            
        

        

For professional programmers, details like these are sometimes important. But for most programs, use int or long for integers and double for floating point. This will keep you out of trouble (usually). If you can't avoid the problem, use a type cast, as described in a future chapter.


        

    





    

        

        

        

    





    















Question 5:
Do you expect that a modern electronic calculator will give you the same answer as Java for 
 the expression  (31.5 - 12)/4.1 ?