can enum values be assigned to integer values for calculations?

Question

enum Month {Jan=1,Feb=2,Mar=3,Apr=4,May=5}

Is anything like this possible instead of just,,
enum Month {Jan,Feb,Mar,Apr,May}
I mean,
if(Month==1)
would be more preferable than
if(Month==Jan)

Answer 1

In Java enums are similar to classes, so you can do the following:
public enum Something {
OPEN(100), CLOSE(200);

private final int id;
Something(int id) { this.id = id; }
public int getValue() { return id; }
}

See this link for more info: http://docs.oracle.com/javase/tutorial/java/javaOO/enum.html