what is compile time constant in switch case?

[aslika bahini]

Hi,
what is compile time constant in switch case?

 
     final int a =1;
     final int b;
     b = 2;
     int x =0;
     switch(x)
       case a:   //ok
       case b:   //compiler error
    
 

   

why the above code doesn't work?

Thanks!
regards
samura

[Juwonlo Ibigbami]

code:
---------------------------------------------------------------------------

final int a =1;
final int b;
b = 2;
int x =0;
switch(x)
case a: //ok
case b: //compiler error

---------------------------------------------------------------------------

your variable a and b should be a constant and should be declear as final ans static with iniialised value