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Converting characters to symbols/emoticons

Rohit Shaarma
Greenhorn

Joined: Nov 16, 2011
Posts: 11
Hi All,


I am stuck with an issue,i am fetching feeds from different social networking sites and displaying them somewhere while doing this few characters like <3 is converted to a heart symbol there are many other characters like smileys etc, so just wanna know what would be the best approach to handle these conversions in JAVA.





-Regards,
Rohit Sharma
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 38412
    
  23
There probably is not a “best” way to do these things. You realise there are Unicode characters for smileys? This, for example, is \u263b: ☻ There are replacement methods in the String class. Have you tried them?
Rohit Shaarma
Greenhorn

Joined: Nov 16, 2011
Posts: 11
Yeah we can replace string with unicode character but that looks good if we are dealing with a single symbol/emoticon but how should be the design if we want to take care of multiple symbols/emoticons.
would just having a map of all the spl symbols and then checking for their presence in the messages and then replacing them would do??
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 38412
    
  23
What does “spl” mean? Please read this.

You can put the symbols and their ASCII translations in a Map (as “V” and “K” respectively), yes. You might find you have to traverse the String and seek whether the String begins with all the “K”s at each character. Then you can append the character to a StringBuilder. Yes, it would work, but you are going to find that runs in O(m × n) complexity, which is rather like quadratic complexity.
You might not find a solution which has a lower complexity.
Rohit Shaarma
Greenhorn

Joined: Nov 16, 2011
Posts: 11
Currently have implemented using javascript replace function by replacing the special characters with unicode characters, its working great just wondering whether handling on UI side is appropriate or not.
fred rosenberger
lowercase baba
Bartender

Joined: Oct 02, 2003
Posts: 11246
    
  16

Campbell Ritchie wrote:What does “spl” mean?
"Spleen" is the only thing I can think of...


There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors
Paul Clapham
Bartender

Joined: Oct 14, 2005
Posts: 18541
    
    8

Rohit Shaarma wrote:Currently have implemented using javascript replace function by replacing the special characters with unicode characters


And you could have done that exactly the same way in Java. I guess that answers your original question then.

its working great just wondering whether handling on UI side is appropriate or not.


That entirely depends on the details of your application.
 
With a little knowledge, a cast iron skillet is non-stick and lasts a lifetime.
 
subject: Converting characters to symbols/emoticons