@Override public boolean equals(Object obj){
  if (obj == this) {
    return true;
  }
  if (!(obj instanceof PieDataset)) {
    return false;
  }
  PieDataset that=(PieDataset)obj;
  int count=getItemCount();
  if (that.getItemCount() != count) {
    return false;
  }
  for (int i=0; i < count; i++) {
    Comparable k1=getKey(i);
    Comparable k2=that.getKey(i);
    if (!k1.equals(k2)) {
      return false;
    }
    Number v1=getValue(i);
    Number v2=that.getValue(i);
    if (v1 == null) {
      if (v2 != null) {
        return false;
      }
    }
 else {
      if (!v1.equals(v2)) {
        return false;
      }
    }
  }
  return true;
}

@ Override public boolean equals ( Object obj ) { if ( obj == this ) { return true ; } if ( ! ( obj instanceof PieDataset ) ) { return false ; } PieDataset that = ( PieDataset ) obj ; int count = getItemCount ( ) ; if ( that . getItemCount ( ) != count ) { return false ; } for ( int i = 0 ; i < count ; i ++ ) { Comparable k1 = getKey ( i ) ; Comparable k2 = that . getKey ( i ) ; if ( ! k1 . equals ( k2 ) ) { return false ; } Number v1 = getValue ( i ) ; Number v2 = that . getValue ( i ) ; if ( v1 == null ) { if ( v2 != null ) { return false ; } } else { if ( ! v1 . equals ( v2 ) ) { return false ; } } } return true ; }
tests if this object is equal to another .
