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Java

Posted by Matthew Lee
Matthew Lee
6,715 Points

Trouble understanding the Comparator Interface and the compare method and compareTo method.

Hi,

I am working on the java data structures Karaoke project.

I am having trouble understanding the difference between the comparable interface and comparator interface.

Also, the difference between compare and compareTo methods. And why we pass in a Comparator as an argument when calling a sort method.

Thanks

2 Answers

Alexander Nikiforov
.a{fill-rule:evenodd;}techdegree seal-36
Alexander Nikiforov
Java Web Development Techdegree Graduate 22,175 Points

I am having trouble understanding the difference between the comparable interface and comparator interface.

Very good answer here

http://stackoverflow.com/questions/4108604/java-comparable-vs-comparator

Please read carefully. And one nice link with a example from there

http://www.digizol.com/2008/07/java-sorting-comparator-vs-comparable.html

Matthew Lee
Matthew Lee
6,715 Points
Matthew Lee
Matthew Lee
6,715 Points

Thanks! The bottom link helped a lot especially.