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sorting using comparator interface

Micah Wedemeyer
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Joined: Jun 11, 2001
Posts: 68
I have an object that contains basically 2 fields: a String and an integer. When I sort for display I want to be able to sort both ways, alphabetically and numerically. Right now, inside the object I have written an equals(Object o) method for the aphabetical display. I wrote my own quickSort for numerical display. Should I just get rid of the equals method and write 2 comparator classes? I'm not exactly sure how to use comparator, or if it even applies here, but it seems right.
Someone give me some help, please!
Micah
Junaid Bhatra
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Joined: Jun 27, 2000
Posts: 213
You seem to be on the right track. Assuming you have a List of your objects, you could write two Comparator classes, one for sorting by integers & the other one by Strings. Then you could use the following method passing in the appropriate Comparator instance:

You could define the comparator class as:

You get the general idea...

[This message has been edited by Junaid Bhatra (edited August 02, 2001).]
Micah Wedemeyer
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Joined: Jun 11, 2001
Posts: 68
Ok, got it working with Collections.sort() Heh, it's even faster than my quickSort was. I guess I'll have to brush up on my sorting optimizations.
Micah
 
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