We can deploy the lower version class files in the higher versions, means, we can compile the application with 1.4 and we can deploy that in 1.5. but we cant compile the 1.4 version in1.5.
int enum=0; -- correct in 1.4
int enum=0;--->not correct in 1.5
int enum=0; -- correct in 1.4
int enum=0;--->not correct in 1.5
