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Start your free trialGrigorij Schleifer
10,365 PointsHelp needed with generics ...
Why we have to delete the line
BlogPost other = (BlogPost) obj;
in the challange
public int compareTo(BlogPost other) {
BlogPost other = (BlogPost) obj;
if (equals(other)) {
return 0;
}
return mCreationDate.compareTo(other.mCreationDate);
}
I know that we give the parameter BlogPost "other" to the method compareTo() . But why we donΒ΄t need to initialise the "other" object of BlogPost class anymore???
1 Answer
Allan Clark
10,810 PointsThere is no need to redeclare nor reinitialize any parameters inside that method. What ever is passed to the method though the method call is accessed using the parameter. The line:
BlogPost other = (BlogPost) obj;
is only needed for casting from the Object class to the BlogPost class. Generics make it so we don't have to do this cumbersome changing of classes.
Hope this helps, let me know if i can clear anything else up.