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Sorting Asciibetically

Lexy Yang
Greenhorn

Joined: May 07, 2012
Posts: 2
How do you sort strings asciibetically?
Pondurai Singh
Ranch Hand

Joined: Jun 27, 2011
Posts: 35
Example program Sort an array of ASCII strings into ascending order
Reference: oreilly.com/9781565923713/


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Rob Spoor
Sheriff

Joined: Oct 27, 2005
Posts: 19538
    
  16

No offense, but I would never use anything from that code:
1) That Comparer interface is exactly the same as the old non-generic java.util.Comparator interface.
2) That Comparable interface is exactly the same as the old non-generic java.lang.Comparable interface.
3) That sorting functionality already exists in java.util.Arrays. To sort in reverse order, you can use one of the two reverseOrder methods in java.util.Collections.


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Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 36453
    
  15
Rob Spoor wrote: . . . To sort in reverse order, you can use one of the two reverseOrder methods in java.util.Collections.
Or you write a ComparatorNow that is really complicated, isn’t it
Rob Spoor
Sheriff

Joined: Oct 27, 2005
Posts: 19538
    
  16

That compare method is 100% identical to the implementation of reverseOrder(). That's also a singleton which makes it slightly more efficient - no matter how many times you call the method, only one object is created.
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 36453
    
  15
I hadn’t noticed that reverseOrder creates a Comparator rather than reversing the list
 
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