public BookSheetKey(int bookIndex, int sheetIndex) {_bookIndex = bookIndex;_sheetIndex = sheetIndex;}

public BookSheetKey ( int bookIndex , int sheetIndex ) { _bookIndex = bookIndex ; _sheetIndex = sheetIndex ; }
public BookSheetKey(int bookIndex, int sheetIndex){_bookIndex = bookIndex;_sheetIndex = sheetIndex;}
