Symmetric difference of two Java arrays

Question

I have two arrays

 String[] ID1={\"19\",\"20\",\"12\",\"13\",\"14\"};

 String[] ID2={\"10\",\"11\",\"12\",\"13\",\"15\"};  

How can I get

Answer 1

It looks like XOR operation ;)

Please describe your needs a little bit more directly. Pseudocode:

foreach s in ID1 {
  if(ID2.contains(s)) {
    ID2.remove(s)
  } else {
    ID2.add(s)
  }
}

ID2 will contain your result. In assumption that there are not duplicates in both arrays.