@Override public boolean equals(Object other){
  if (other instanceof IntArrayWrapper) {
    return Arrays.equals(data,((IntArrayWrapper)other).data);
  }
  return false;
}

@ Override public boolean equals ( Object other ) { if ( other instanceof IntArrayWrapper ) { return Arrays . equals ( data , ( ( IntArrayWrapper ) other ) . data ) ; } return false ; }
this method will be used check to arraywrapper object is equal or not
