class Day05_Work2 {
public static void main(String[] args) {
  int[] arr = {6,2,9,6,1,2,6,7,8};
  getArray(arr);
  
}

public static void getArray(int[] arr){
  for (int a = 0;a < arr.length ;a++ ) {
   for (int b = a +1; b < arr.length ;b++ ) {
    if (arr[a]==arr[b]) {
     arr[b] = -1;
    }
   }
  }
  for (int c = 0;c < arr.length ;c++ ) {
   if (arr[c] == -1) {
    continue;
   } else {
    System.out.print(arr[c]+" ");
   }
  }
}
}

不错.......................