Avoid Reprinting Of Duplicate Values In Array

I have a practice program (written with NetBeans IDE 7.4) that calls methods to:

(1) fill an array with user input values

(2) sort the array values into ascending order

(3) print the array in assorted order.

(4) print the array without any duplicates

Method (4) prints the contents of the array without printing any duplicates. That is, if a number in the array has already been printed, it will not be printed again.

Method (4) seems to work, but may be inefficient or I may have done too much work making it difficult on myself or making the logic too confusing.

Is there a better way to do this WITHOUT using built-in functions in Java's library?

(Such as writing this method using for loops and counter variables: As practice I am supposed to avoid using Deleting functions for duplicates)

Here is my code:

public static void Duplicates(int [] array){
int duplicates = 1;
String Output = "";
for(int i = 0; i < array.length -1; i++) {
if (array[i] != array[i+1]){
duplicates ++;

[Code] .....