interface - Rate is not abstract and does not override abstract method compareTo(java.lang.Object) in java.lang.Comparable -

I'm getting an error telling me that I'm not implementing the comparative method when I'm. My code looks like this (I leave the accelerator method because they are OK):

  applies the public class rate Comparative {Private Entity Month; Private int de; Private int year; Private double rate; Private int a; Private int b Private int c; Private int d; // Constructor method for class mass rate (int month, int day, int verte, double rate 0) {month = month; Day = day 0; Year = year 0; Rate = rate 0; } Compare the public difference (rate obj) // @ the absolute obj rate object that will be compared to other rate objects {A = (int) rate - (visceral) obj.getRate (); B = year - obj.getYear (); C = months - obj.getMonth (); D = day - obj.getDay (); If (a! = 0) comes back; // @ Return the difference between the rate for one of two objects if (b! = 0) b returns; // @ Renton B. If the difference between the two items for the year (C! = 0) return C; // @ Return C If the difference between months for two items (D! = 0) return D; // @Ruran D. The differences between days for the two items and return 0; // @ 0 layer if two objects are completely identical. }}  

change this:

  public class Comparative to apply rate  

This:

  applies the public class rate Comparative < Rate & gt;  

Ensure that you override equals and hash loads, and that your equal method gives the same behavior as comparison, when two values ​​are the same, if you do not, then you are subtle, Bugs will experience.