Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Java Java Data Structures - Retired Exploring the Java Collection Framework Meet the JCF

Huzaifa Nasir
Huzaifa Nasir
2,150 Points
Posted by Huzaifa Nasir
Huzaifa Nasir
2,150 Points

what is the point of the compareTo method after the parameter is changed?

Aren't you just comparing other to itself once the parameter is changed to be of type Treet? Wouldn't that always be the case?

1 Answer

Danial Goodwin
Danial Goodwin
13,247 Points
Danial Goodwin
Danial Goodwin
13,247 Points

When you see the line:

if (this == (Tweet) other) { return 0; }

It is not comparing if both of are type Tweet. It is comparing the references of this and other to see if they point to the same location in memory.

To compare types, you could do something like if (other instanceof this.getClass()) { /**/ }