unique elements in an array

[Anurag Malaviya]

how to count unique elements in an integer array without
using any predefined method?

[Matthew Brown]

There are lots of possible ways of doing that. What have you tried so far?

[Anurag Malaviya]

Matthew Brown wrote:There are lots of possible ways of doing that. What have you tried so far?

i am using a loop to traverse the array and find out the total number of occurrence of all elements .
But its not working properly. Can you suggest any other approach.

[Matthew Brown]

It's certainly possible that way - maybe you should show us your code and tell us what's not working. One thing - you might find it easier if you sort the array into ascending order first.

[Campbell Ritchie]

Or copy the array and sort and search the copy.
Or copy all values into a set; adding values to a Set in Java™ gives a return value which might be helpful.