Java Method for removing duplicates from char array

Question

I have a char array filled by the user (arrayInput[]) with some characters, like {b, d, a, b, f, a, g, a, a, f}, and I need to create a method which returns a new c

Answer 1

If you consider using of collection framework then it would be much easier. Your array of char with duplicate is arrayInput. Now put each char from it to a HashSet like this -

HashSet uniqueCharSet = new HashSet();
for(char each : arrayInput){

   uniqueCharSet.add(each);
}   

Now the HashSet uniqueCharSet will contains only the unique characters from the char array arrayInput. Note here all element in uniqueCharSet are wrapper type - Character.

You can convert the HashSet uniqueCharSet to array of Character like this -

Object[] uniqueCharArray = uniqueCharSet.toArray();

And then you can use them like this -

for(Object each : uniqueCharArray){
   Character c = (Character) each;
   System.out.println(c);
}