(Solved): Please give full java code for the below (not using hash set) AND provide detailed comments and pseu ...

Please give full java code for the below (not using hash set) AND provide detailed comments and pseudocode for each step and on efficiency - Please also make use of advanced approaches such as recursion, and demonstrating a more efficient approach.

With the aid of a full code implementation, show how you can take an array of $$n$$ values, determine how many unique elements $$e$$ are part of the array and output each unique value once in ascending order. For the case of the above example, the value $$n$$ would be 6 , the number of unique value elements $$e$$ would be 5 , and those unique values would be outputted as: $$1,2,6,8,9$$.