int n ;

switch(n){
   case 0:
   case 1:
   case 2: System.out.println ( "the number is <= 2"); break;
   case 3:
   case 4:
   case 5: System.out.println ( "the number is >=3 and <= 5"); break; 
   default :  System.out.println ( "the number is grater than 5"); break;
}