how to remove duplicate elements from char array in java

1public static void main(String[] args) {
2    Main main = new Main();
3    char[] array = {'e','a','b','a','c','d','b','d','c','e'};
4    main.getCharArray(array);
5}
6
7private char[] getCharArray(char[] array) {
8    String _array = "";
9    for(int i = 0; i < array.length; i++) {
10        if(_array.indexOf(array[i]) == -1) // check if a char already exist, if not exist then return -1
11            _array = _array+array[i];      // add new char
12    }
13    return _array.toCharArray();
14}
15