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Message:

Re: hashtables

Posted by Kishori Sharan on February 01, 2001 at 11:16 PM

There are two ways to do this using hashtable
1) Use a character in a string as key and then the number as a string in value and again back
key value
"a" "12"
"b" "13"
"c" "14"
"12" "a"
"13" "b"
"14" "c"

This way given a number you can get its coded character and given a character you can get its code by just using get method of hashmap. Of course, you need to convert the number and string back to int and character ..
2) In this case just maintain one set i.e from chars to ints in string form and then to get the number given a char just use get method of hashmap and then to get the char given a number use iterator or any other method you feel may serve the purpose.

Thanx
Kishori