HSSFWorkbook (POI API Documentation)

java.lang.Object
- org.apache.poi.POIDocument
- - org.apache.poi.hssf.usermodel.HSSFWorkbook

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, java.lang.Iterable<Sheet>, Workbook
```
public final class HSSFWorkbook
extends POIDocument
implements Workbook
```
High level representation of a workbook. This is the first object most users will construct whether they are reading or writing a workbook. It is also the top level object for creating new sheets/etc.

See Also:

InternalWorkbook, HSSFSheet

Field Summary

Fields
Modifier and Type	Field and Description
`protected java.util.List<HSSFSheet>`	`_sheets` this holds the HSSFSheet objects attached to this workbook
`static int`	`INITIAL_CAPACITY` used for compile-time performance/memory optimization.

Fields inherited from interface org.apache.poi.ss.usermodel.Workbook
PICTURE_TYPE_DIB, PICTURE_TYPE_EMF, PICTURE_TYPE_JPEG, PICTURE_TYPE_PICT, PICTURE_TYPE_PNG, PICTURE_TYPE_WMF

Constructor Summary

Constructors
Constructor and Description
`HSSFWorkbook()` Creates new HSSFWorkbook from scratch (start here!)
`HSSFWorkbook(DirectoryNode directory, boolean preserveNodes)` given a POI POIFSFileSystem object, and a specific directory within it, read in its Workbook and populate the high and low level models.
`HSSFWorkbook(DirectoryNode directory, POIFSFileSystem fs, boolean preserveNodes)` given a POI POIFSFileSystem object, and a specific directory within it, read in its Workbook and populate the high and low level models.
`HSSFWorkbook(java.io.InputStream s)` Companion to HSSFWorkbook(POIFSFileSystem), this constructs the POI filesystem around your `InputStream`, including all nodes.
`HSSFWorkbook(java.io.InputStream s, boolean preserveNodes)` Companion to HSSFWorkbook(POIFSFileSystem), this constructs the POI filesystem around your `InputStream`.
`HSSFWorkbook(POIFSFileSystem fs)` Given a POI POIFSFileSystem object, read in its Workbook along with all related nodes, and populate the high and low level models.
`HSSFWorkbook(POIFSFileSystem fs, boolean preserveNodes)` Given a POI POIFSFileSystem object, read in its Workbook and populate the high and low level models.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`int`	`addOlePackage(byte[] oleData, java.lang.String label, java.lang.String fileName, java.lang.String command)` Adds an OLE package manager object with the given content to the sheet
`int`	`addOlePackage(POIFSFileSystem poiData, java.lang.String label, java.lang.String fileName, java.lang.String command)` Adds an OLE package manager object with the given POIFS to the sheet
`int`	`addPicture(byte[] pictureData, int format)` Adds a picture to the workbook.
`void`	`addToolPack(UDFFinder toopack)` Register a new toolpack in this workbook.
`boolean`	`changeExternalReference(java.lang.String oldUrl, java.lang.String newUrl)` Changes an external referenced file to another file.
`HSSFSheet`	`cloneSheet(int sheetIndex)` create an HSSFSheet from an existing sheet in the HSSFWorkbook.
`void`	`close()` Closes the underlying `POIFSFileSystem` from which the Workbook was read, if any.
`static HSSFWorkbook`	`create(InternalWorkbook book)`
`HSSFCellStyle`	`createCellStyle()` Create a new Cell style and add it to the workbook's style table.
`HSSFDataFormat`	`createDataFormat()` Returns the instance of HSSFDataFormat for this workbook.
`HSSFEvaluationWorkbook`	`createEvaluationWorkbook()`
`HSSFFont`	`createFont()` create a new Font and add it to the workbook's font table
`HSSFName`	`createName()` creates a new named range and add it to the model
`HSSFSheet`	`createSheet()` create an HSSFSheet for this HSSFWorkbook, adds it to the sheets and returns the high level representation.
`HSSFSheet`	`createSheet(java.lang.String sheetname)` Create a new sheet for this Workbook and return the high level representation.
`void`	`dumpDrawingGroupRecords(boolean fat)` Spits out a list of all the drawing records in the workbook.
`HSSFFont`	`findFont(boolean bold, short color, short fontHeight, java.lang.String name, boolean italic, boolean strikeout, short typeOffset, byte underline)` Finds a font that matches the one with the supplied attributes
`int`	`getActiveSheetIndex()` gets the tab whose data is actually seen when the sheet is opened.
`java.util.List<HSSFObjectData>`	`getAllEmbeddedObjects()` Gets all embedded OLE2 objects from the Workbook.
`java.util.List<HSSFName>`	`getAllNames()` Returns all defined names.
`java.util.List<HSSFPictureData>`	`getAllPictures()` Gets all pictures from the Workbook.
`boolean`	`getBackupFlag()` determine whether the Excel GUI will backup the workbook when saving.
`byte[]`	`getBytes()` Method getBytes - get the bytes of just the HSSF portions of the XLS file.
`HSSFCellStyle`	`getCellStyleAt(int idx)` get the cell style object at the given index
`HSSFCreationHelper`	`getCreationHelper()` Returns an object that handles instantiating concrete classes of the various instances one needs for HSSF and XSSF.
`HSSFPalette`	`getCustomPalette()`
`EncryptionInfo`	`getEncryptionInfo()`
`int`	`getFirstVisibleTab()` sets the first tab that is displayed in the list of tabs in excel.
`HSSFFont`	`getFontAt(int idx)` Get the font at the given index number
`boolean`	`getForceFormulaRecalculation()` Whether Excel will be asked to recalculate all formulas when the workbook is opened.
`InternalWorkbook`	`getInternalWorkbook()`
`Row.MissingCellPolicy`	`getMissingCellPolicy()` Retrieves the current policy on what to do when getting missing or blank cells from a row.
`HSSFName`	`getName(java.lang.String name)`
`java.lang.String`	`getNameName(int index)` gets the named range name
`NameRecord`	`getNameRecord(int nameIndex)`
`java.util.List<HSSFName>`	`getNames(java.lang.String name)` Returns all defined names with the given name.
`int`	`getNumberOfFonts()` Get the number of fonts in the font table
`int`	`getNumberOfFontsAsInt()` Deprecated.
`int`	`getNumberOfNames()`
`int`	`getNumberOfSheets()` get the number of spreadsheets in the workbook (this will be three after serialization)
`int`	`getNumCellStyles()` get the number of styles the workbook contains
`java.lang.String`	`getPrintArea(int sheetIndex)` Retrieves the reference for the printarea of the specified sheet, the sheet name is appended to the reference even if it was not specified.
`java.util.Collection<java.lang.Integer>`	`getSelectedTabs()` Gets the selected sheets (if more than one, Excel calls these a [Group]).
`HSSFSheet`	`getSheet(java.lang.String name)` Get sheet with the given name (case insensitive match)
`HSSFSheet`	`getSheetAt(int index)` Get the HSSFSheet object at the given index.
`int`	`getSheetIndex(Sheet sheet)` Returns the index of the given sheet
`int`	`getSheetIndex(java.lang.String name)` Returns the index of the sheet by his name
`java.lang.String`	`getSheetName(int sheetIndex)` Get the sheet name
`SheetVisibility`	`getSheetVisibility(int sheetIx)` Get the visibility (visible, hidden, very hidden) of a sheet in this workbook
`SpreadsheetVersion`	`getSpreadsheetVersion()` Returns the spreadsheet version (EXCLE97) of this workbook
`InternalWorkbook`	`getWorkbook()`
`static java.lang.String`	`getWorkbookDirEntryName(DirectoryNode directory)`
`void`	`insertChartRecord()` Test only.
`boolean`	`isHidden()`
`boolean`	`isSheetHidden(int sheetIx)` Check whether a sheet is hidden.
`boolean`	`isSheetVeryHidden(int sheetIx)` Check whether a sheet is very hidden.
`boolean`	`isWriteProtected()` Is the workbook protected with a password (not encrypted)?
`java.util.Iterator<Sheet>`	`iterator()` Alias for `sheetIterator()` to allow foreach loops
`int`	`linkExternalWorkbook(java.lang.String name, Workbook workbook)` Adds the LinkTable records required to allow formulas referencing the specified external workbook to be added to this one.
`void`	`removeName(Name name)` Remove a name.
`void`	`removePrintArea(int sheetIndex)` Delete the printarea for the sheet specified
`void`	`removeSheetAt(int index)` Removes sheet at the given index.
`void`	`setActiveSheet(int index)` Convenience method to set the active sheet.
`void`	`setBackupFlag(boolean backupValue)` determine whether the Excel GUI will backup the workbook when saving.
`void`	`setFirstVisibleTab(int index)` sets the first tab that is displayed in the list of tabs in excel.
`void`	`setForceFormulaRecalculation(boolean value)` Whether the application shall perform a full recalculation when the workbook is opened.
`void`	`setHidden(boolean hiddenFlag)`
`void`	`setMissingCellPolicy(Row.MissingCellPolicy missingCellPolicy)` Sets the policy on what to do when getting missing or blank cells from a row.
`void`	`setPrintArea(int sheetIndex, int startColumn, int endColumn, int startRow, int endRow)` For the Convenience of Java Programmers maintaining pointers.
`void`	`setPrintArea(int sheetIndex, java.lang.String reference)` Sets the printarea for the sheet provided
`void`	`setSelectedTab(int index)` Selects a single sheet.
`void`	`setSelectedTabs(java.util.Collection<java.lang.Integer> indexes)` Selects multiple sheets as a group.
`void`	`setSelectedTabs(int[] indexes)` Selects multiple sheets as a group.
`void`	`setSheetHidden(int sheetIx, boolean hidden)` Hide or unhide a sheet.
`void`	`setSheetName(int sheetIx, java.lang.String name)` Set the sheet name.
`void`	`setSheetOrder(java.lang.String sheetname, int pos)` sets the order of appearance for a given sheet.
`void`	`setSheetVisibility(int sheetIx, SheetVisibility visibility)` Hide or unhide a sheet.
`java.util.Iterator<Sheet>`	`sheetIterator()` Returns an iterator of the sheets in the workbook in sheet order.
`void`	`unwriteProtectWorkbook()` removes the write protect flag
`void`	`write()` Write out this workbook to the currently open `File` via the writeable `POIFSFileSystem` it was opened as.
`void`	`write(java.io.File newFile)` Method write - write out this workbook to a new `File`.
`void`	`write(java.io.OutputStream stream)` Method write - write out this workbook to an `OutputStream`.
`void`	`writeProtectWorkbook(java.lang.String password, java.lang.String username)` protect a workbook with a password (not encypted, just sets writeprotect flags and the password.

Methods inherited from class org.apache.poi.POIDocument
clearDirectory, createInformationProperties, getDirectory, getDocumentSummaryInformation, getEncryptedPropertyStreamName, getPropertySet, getPropertySet, getSummaryInformation, initDirectory, readProperties, replaceDirectory, validateInPlaceWritePossible, writeProperties, writeProperties, writeProperties

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.lang.Iterable
forEach, spliterator

- Field Detail
  - INITIAL_CAPACITY
```
public static final int INITIAL_CAPACITY
```
    used for compile-time performance/memory optimization. This determines the initial capacity for the sheet collection. Its currently set to 3. Changing it in this release will decrease performance since you're never allowed to have more or less than three sheets!
  - _sheets
```
protected java.util.List<HSSFSheet> _sheets
```
    this holds the HSSFSheet objects attached to this workbook
- Constructor Detail
  - HSSFWorkbook
```
public HSSFWorkbook()
```
    Creates new HSSFWorkbook from scratch (start here!)
  - HSSFWorkbook
```
public HSSFWorkbook(POIFSFileSystem fs)
             throws java.io.IOException
```
    Given a POI POIFSFileSystem object, read in its Workbook along with all related nodes, and populate the high and low level models.
    This calls HSSFWorkbook(POIFSFileSystem, boolean) with preserve nodes set to true.
    
    Throws:
    
    java.io.IOException - if the stream cannot be read
    
    See Also:
    
    HSSFWorkbook(POIFSFileSystem, boolean), POIFSFileSystem
  - HSSFWorkbook
```
public HSSFWorkbook(POIFSFileSystem fs,
                    boolean preserveNodes)
             throws java.io.IOException
```
    Given a POI POIFSFileSystem object, read in its Workbook and populate the high and low level models. If you're reading in a workbook... start here!
    
    Parameters:
    
    fs - the POI filesystem that contains the Workbook stream.
    
    preserveNodes - whether to preserve other nodes, such as macros. This takes more memory, so only say yes if you need to. If set, will store all of the POIFSFileSystem in memory
    
    Throws:
    
    java.io.IOException - if the stream cannot be read
    
    See Also:
    
    POIFSFileSystem
  - HSSFWorkbook
```
public HSSFWorkbook(DirectoryNode directory,
                    POIFSFileSystem fs,
                    boolean preserveNodes)
             throws java.io.IOException
```
    given a POI POIFSFileSystem object, and a specific directory within it, read in its Workbook and populate the high and low level models. If you're reading in a workbook...start here.
    
    Parameters:
    
    directory - the POI filesystem directory to process from
    
    fs - the POI filesystem that contains the Workbook stream.
    
    preserveNodes - whether to preserve other nodes, such as macros. This takes more memory, so only say yes if you need to. If set, will store all of the POIFSFileSystem in memory
    
    Throws:
    
    java.io.IOException - if the stream cannot be read
    
    See Also:
    
    POIFSFileSystem
  - HSSFWorkbook
```
public HSSFWorkbook(DirectoryNode directory,
                    boolean preserveNodes)
             throws java.io.IOException
```
    given a POI POIFSFileSystem object, and a specific directory within it, read in its Workbook and populate the high and low level models. If you're reading in a workbook...start here.
    
    Parameters:
    
    directory - the POI filesystem directory to process from
    
    preserveNodes - whether to preserve other nodes, such as macros. This takes more memory, so only say yes if you need to. If set, will store all of the POIFSFileSystem in memory
    
    Throws:
    
    java.io.IOException - if the stream cannot be read
    
    See Also:
    
    POIFSFileSystem
  - HSSFWorkbook
```
public HSSFWorkbook(java.io.InputStream s)
             throws java.io.IOException
```
    Companion to HSSFWorkbook(POIFSFileSystem), this constructs the POI filesystem around your InputStream, including all nodes.
    This calls HSSFWorkbook(InputStream, boolean) with preserve nodes set to true.
    
    Throws:
    
    java.io.IOException - if the stream cannot be read
    
    See Also:
    
    HSSFWorkbook(InputStream, boolean), HSSFWorkbook(POIFSFileSystem), POIFSFileSystem
  - HSSFWorkbook
```
public HSSFWorkbook(java.io.InputStream s,
                    boolean preserveNodes)
             throws java.io.IOException
```
    Companion to HSSFWorkbook(POIFSFileSystem), this constructs the POI filesystem around your InputStream.
    
    Parameters:
    
    s - the POI filesystem that contains the Workbook stream.
    
    preserveNodes - whether to preserve other nodes, such as macros. This takes more memory, so only say yes if you need to.
    
    Throws:
    
    java.io.IOException - if the stream cannot be read
    
    See Also:
    
    POIFSFileSystem, HSSFWorkbook(POIFSFileSystem)
- Method Detail
  - create
```
public static HSSFWorkbook create(InternalWorkbook book)
```
  - getWorkbookDirEntryName
```
public static java.lang.String getWorkbookDirEntryName(DirectoryNode directory)
```
  - getMissingCellPolicy
```
public Row.MissingCellPolicy getMissingCellPolicy()
```
    Retrieves the current policy on what to do when getting missing or blank cells from a row. The default is to return blank and null cells. Row.MissingCellPolicy
    
    Specified by:
    
    getMissingCellPolicy in interface Workbook
  - setMissingCellPolicy
```
public void setMissingCellPolicy(Row.MissingCellPolicy missingCellPolicy)
```
    Sets the policy on what to do when getting missing or blank cells from a row. This will then apply to all calls to HSSFRow.getCell(int)}. See Row.MissingCellPolicy. Note that this has no effect on any iterators, only on when fetching Cells by their column index.
    
    Specified by:
    
    setMissingCellPolicy in interface Workbook
  - setSheetOrder
```
public void setSheetOrder(java.lang.String sheetname,
                          int pos)
```
    sets the order of appearance for a given sheet.
    
    Specified by:
    
    setSheetOrder in interface Workbook
    
    Parameters:
    
    sheetname - the name of the sheet to reorder
    
    pos - the position that we want to insert the sheet into (0 based)
  - setSelectedTab
```
public void setSelectedTab(int index)
```
    Selects a single sheet. This may be different to the 'active' sheet (which is the sheet with focus).
    
    Specified by:
    
    setSelectedTab in interface Workbook
    
    Parameters:
    
    index - the index of the sheet to select (0 based)
    
    See Also:
    
    Sheet.setSelected(boolean)
  - setSelectedTabs
```
public void setSelectedTabs(int[] indexes)
```
    Selects multiple sheets as a group. This is distinct from the 'active' sheet (which is the sheet with focus). Unselects sheets that are not in indexes.
    
    Parameters:
    
    indexes - Array of sheets to select, the index is 0-based.
  - setSelectedTabs
```
public void setSelectedTabs(java.util.Collection<java.lang.Integer> indexes)
```
    Selects multiple sheets as a group. This is distinct from the 'active' sheet (which is the sheet with focus). Unselects sheets that are not in indexes.
    
    Parameters:
    
    indexes - Collection of sheets to select, the index is 0-based.
  - getSelectedTabs
```
public java.util.Collection<java.lang.Integer> getSelectedTabs()
```
    Gets the selected sheets (if more than one, Excel calls these a [Group]).
    
    Returns:
    
    indices of selected sheets
  - setActiveSheet
```
public void setActiveSheet(int index)
```
    Convenience method to set the active sheet. The active sheet is is the sheet which is currently displayed when the workbook is viewed in Excel. 'Selected' sheet(s) is a distinct concept.
    
    Specified by:
    
    setActiveSheet in interface Workbook
    
    Parameters:
    
    index - index of the active sheet (0-based)
  - getActiveSheetIndex
```
public int getActiveSheetIndex()
```
    gets the tab whose data is actually seen when the sheet is opened. This may be different from the "selected sheet" since excel seems to allow you to show the data of one sheet when another is seen "selected" in the tabs (at the bottom).
    
    Specified by:
    
    getActiveSheetIndex in interface Workbook
    
    Returns:
    
    the index of the active sheet (0-based)
    
    See Also:
    
    HSSFSheet.setSelected(boolean)
  - setFirstVisibleTab
```
public void setFirstVisibleTab(int index)
```
    sets the first tab that is displayed in the list of tabs in excel. This method does not hide, select or focus sheets. It just sets the scroll position in the tab-bar.
    
    Specified by:
    
    setFirstVisibleTab in interface Workbook
    
    Parameters:
    
    index - the sheet index of the tab that will become the first in the tab-bar
  - getFirstVisibleTab
```
public int getFirstVisibleTab()
```
    sets the first tab that is displayed in the list of tabs in excel.
    
    Specified by:
    
    getFirstVisibleTab in interface Workbook
    
    Returns:
    
    the first tab that to display in the list of tabs (0-based).
  - setSheetName
```
public void setSheetName(int sheetIx,
                         java.lang.String name)
```
    Set the sheet name.
    
    Specified by:
    
    setSheetName in interface Workbook
    
    Parameters:
    
    sheetIx - number (0 based)
    
    Throws:
    
    java.lang.IllegalArgumentException - if the name is null or invalid or workbook already contains a sheet with this name
    
    See Also:
    
    createSheet(String), WorkbookUtil.createSafeSheetName(String nameProposal)
  - getSheetName
```
public java.lang.String getSheetName(int sheetIndex)
```
    Description copied from interface: Workbook
    
    Get the sheet name
    
    Specified by:
    
    getSheetName in interface Workbook
    
    Parameters:
    
    sheetIndex - sheet number (0 based)
    
    Returns:
    
    Sheet name for the specified index
  - isHidden
```
public boolean isHidden()
```
    Specified by:
    
    isHidden in interface Workbook
    
    Returns:
    
    false if this workbook is not visible in the GUI
  - setHidden
```
public void setHidden(boolean hiddenFlag)
```
    Specified by:
    
    setHidden in interface Workbook
    
    Parameters:
    
    hiddenFlag - pass false to make the workbook visible in the GUI
  - isSheetHidden
```
public boolean isSheetHidden(int sheetIx)
```
    Description copied from interface: Workbook
    
    Check whether a sheet is hidden.
    Note that a sheet could instead be set to be very hidden, which is different (Workbook.isSheetVeryHidden(int))
    
    Specified by:
    
    isSheetHidden in interface Workbook
    
    Parameters:
    
    sheetIx - Number
    
    Returns:
    
    true if sheet is hidden
    
    See Also:
    
    Workbook.getSheetVisibility(int)
  - isSheetVeryHidden
```
public boolean isSheetVeryHidden(int sheetIx)
```
    Description copied from interface: Workbook
    
    Check whether a sheet is very hidden.
    This is different from the normal hidden status (Workbook.isSheetHidden(int))
    
    Specified by:
    
    isSheetVeryHidden in interface Workbook
    
    Parameters:
    
    sheetIx - sheet index to check
    
    Returns:
    
    true if sheet is very hidden
    
    See Also:
    
    Workbook.getSheetVisibility(int)
  - getSheetVisibility
```
public SheetVisibility getSheetVisibility(int sheetIx)
```
    Description copied from interface: Workbook
    
    Get the visibility (visible, hidden, very hidden) of a sheet in this workbook
    
    Specified by:
    
    getSheetVisibility in interface Workbook
    
    Parameters:
    
    sheetIx - the index of the sheet
    
    Returns:
    
    the sheet visibility
  - setSheetHidden
```
public void setSheetHidden(int sheetIx,
                           boolean hidden)
```
    Description copied from interface: Workbook
    
    Hide or unhide a sheet. Please note that the sheet currently set as active sheet (sheet 0 in a newly created workbook or the one set via setActiveSheet()) cannot be hidden.
    
    Specified by:
    
    setSheetHidden in interface Workbook
    
    Parameters:
    
    sheetIx - the sheet index (0-based)
    
    hidden - True to mark the sheet as hidden, false otherwise
    
    See Also:
    
    Workbook.setSheetVisibility(int, SheetVisibility)
  - setSheetVisibility
```
public void setSheetVisibility(int sheetIx,
                               SheetVisibility visibility)
```
    Description copied from interface: Workbook
    
    Hide or unhide a sheet. Please note that the sheet currently set as active sheet (sheet 0 in a newly created workbook or the one set via setActiveSheet()) cannot be hidden.
    
    Specified by:
    
    setSheetVisibility in interface Workbook
    
    Parameters:
    
    sheetIx - the sheet index (0-based)
    
    visibility - the sheet visibility to set
  - getSheetIndex
```
public int getSheetIndex(java.lang.String name)
```
    Returns the index of the sheet by his name
    
    Specified by:
    
    getSheetIndex in interface Workbook
    
    Parameters:
    
    name - the sheet name
    
    Returns:
    
    index of the sheet (0 based)
  - getSheetIndex
```
public int getSheetIndex(Sheet sheet)
```
    Returns the index of the given sheet
    
    Specified by:
    
    getSheetIndex in interface Workbook
    
    Parameters:
    
    sheet - the sheet to look up
    
    Returns:
    
    index of the sheet (0 based). -1 if not found
  - createSheet
```
public HSSFSheet createSheet()
```
    create an HSSFSheet for this HSSFWorkbook, adds it to the sheets and returns the high level representation. Use this to create new sheets.
    
    Specified by:
    
    createSheet in interface Workbook
    
    Returns:
    
    HSSFSheet representing the new sheet.
  - cloneSheet
```
public HSSFSheet cloneSheet(int sheetIndex)
```
    create an HSSFSheet from an existing sheet in the HSSFWorkbook.
    
    Specified by:
    
    cloneSheet in interface Workbook
    
    Returns:
    
    HSSFSheet representing the cloned sheet.
  - createSheet
```
public HSSFSheet createSheet(java.lang.String sheetname)
```
    Create a new sheet for this Workbook and return the high level representation. Use this to create new sheets.
    Note that Excel allows sheet names up to 31 chars in length but other applications (such as OpenOffice) allow more. Some versions of Excel crash with names longer than 31 chars, others - truncate such names to 31 character.
    
    POI's SpreadsheetAPI silently truncates the input argument to 31 characters. Example:
```
     Sheet sheet = workbook.createSheet("My very long sheet name which is longer than 31 chars"); // will be truncated
     assert 31 == sheet.getSheetName().length();
     assert "My very long sheet name which i" == sheet.getSheetName();
     
```
    Except the 31-character constraint, Excel applies some other rules:
    Sheet name MUST be unique in the workbook and MUST NOT contain the any of the following characters:
    - 0x0000
    - 0x0003
    - colon (:)
    - backslash (\)
    - asterisk (*)
    - question mark (?)
    - forward slash (/)
    - opening square bracket ([)
    - closing square bracket (])
    The string MUST NOT begin or end with the single quote (') character.
    Specified by:
    
    createSheet in interface Workbook
    
    Parameters:
    
    sheetname - sheetname to set for the sheet.
    
    Returns:
    
    Sheet representing the new sheet.
    
    Throws:
    
    java.lang.IllegalArgumentException - if the name is null or invalid or workbook already contains a sheet with this name
    
    See Also:
    
    WorkbookUtil.createSafeSheetName(String nameProposal)
  - sheetIterator
```
public java.util.Iterator<Sheet> sheetIterator()
```
    Returns an iterator of the sheets in the workbook in sheet order. Includes hidden and very hidden sheets.
    
    Specified by:
    
    sheetIterator in interface Workbook
    
    Returns:
    
    an iterator of the sheets.
  - iterator
```
public java.util.Iterator<Sheet> iterator()
```
    Alias for sheetIterator() to allow foreach loops
    
    Specified by:
    
    iterator in interface java.lang.Iterable<Sheet>
  - getNumberOfSheets
```
public int getNumberOfSheets()
```
    get the number of spreadsheets in the workbook (this will be three after serialization)
    
    Specified by:
    
    getNumberOfSheets in interface Workbook
    
    Returns:
    
    number of sheets
  - getSheetAt
```
public HSSFSheet getSheetAt(int index)
```
    Get the HSSFSheet object at the given index.
    
    Specified by:
    
    getSheetAt in interface Workbook
    
    Parameters:
    
    index - of the sheet number (0-based physical & logical)
    
    Returns:
    
    HSSFSheet at the provided index
    
    Throws:
    
    java.lang.IllegalArgumentException - if the index is out of range (index < 0 || index >= getNumberOfSheets()).
  - getSheet
```
public HSSFSheet getSheet(java.lang.String name)
```
    Get sheet with the given name (case insensitive match)
    
    Specified by:
    
    getSheet in interface Workbook
    
    Parameters:
    
    name - of the sheet
    
    Returns:
    
    HSSFSheet with the name provided or null if it does not exist
  - removeSheetAt
```
public void removeSheetAt(int index)
```
    Removes sheet at the given index.
    
    Care must be taken if the removed sheet is the currently active or only selected sheet in the workbook. There are a few situations when Excel must have a selection and/or active sheet. (For example when printing - see Bug 40414).
    
    This method makes sure that if the removed sheet was active, another sheet will become active in its place. Furthermore, if the removed sheet was the only selected sheet, another sheet will become selected. The newly active/selected sheet will have the same index, or one less if the removed sheet was the last in the workbook.
    
    Specified by:
    
    removeSheetAt in interface Workbook
    
    Parameters:
    
    index - of the sheet (0-based)
  - setBackupFlag
```
public void setBackupFlag(boolean backupValue)
```
    determine whether the Excel GUI will backup the workbook when saving.
    
    Parameters:
    
    backupValue - true to indicate a backup will be performed.
  - getBackupFlag
```
public boolean getBackupFlag()
```
    determine whether the Excel GUI will backup the workbook when saving.
    
    Returns:
    
    the current setting for backups.
  - createFont
```
public HSSFFont createFont()
```
    create a new Font and add it to the workbook's font table
    
    Specified by:
    
    createFont in interface Workbook
    
    Returns:
    
    new font object
  - findFont
```
public HSSFFont findFont(boolean bold,
                         short color,
                         short fontHeight,
                         java.lang.String name,
                         boolean italic,
                         boolean strikeout,
                         short typeOffset,
                         byte underline)
```
    Finds a font that matches the one with the supplied attributes
    
    Specified by:
    
    findFont in interface Workbook
    
    Returns:
    
    the font with the matched attributes or null
  - getNumberOfFonts
```
public int getNumberOfFonts()
```
    Description copied from interface: Workbook
    
    Get the number of fonts in the font table
    
    Specified by:
    
    getNumberOfFonts in interface Workbook
    
    Returns:
    
    number of fonts (as int since POI 5.0.0)
  - getNumberOfFontsAsInt
```
@Deprecated
 @Removal(version="6.0.0")
public int getNumberOfFontsAsInt()
```
    Deprecated.
    
    Description copied from interface: Workbook
    
    Get the number of fonts in the font table
    
    Specified by:
    
    getNumberOfFontsAsInt in interface Workbook
    
    Returns:
    
    number of fonts
  - getFontAt
```
public HSSFFont getFontAt(int idx)
```
    Description copied from interface: Workbook
    
    Get the font at the given index number
    
    Specified by:
    
    getFontAt in interface Workbook
    
    Parameters:
    
    idx - index number (0-based)
    
    Returns:
    
    font at the index
  - createCellStyle
```
public HSSFCellStyle createCellStyle()
```
    Create a new Cell style and add it to the workbook's style table. You can define up to 4000 unique styles in a .xls workbook.
    
    Specified by:
    
    createCellStyle in interface Workbook
    
    Returns:
    
    the new Cell Style object
    
    Throws:
    
    java.lang.IllegalStateException - if the number of cell styles exceeded the limit for this type of Workbook.
  - getNumCellStyles
```
public int getNumCellStyles()
```
    get the number of styles the workbook contains
    
    Specified by:
    
    getNumCellStyles in interface Workbook
    
    Returns:
    
    count of cell styles
  - getCellStyleAt
```
public HSSFCellStyle getCellStyleAt(int idx)
```
    get the cell style object at the given index
    
    Specified by:
    
    getCellStyleAt in interface Workbook
    
    Parameters:
    
    idx - index within the set of styles
    
    Returns:
    
    HSSFCellStyle object at the index
  - close
```
public void close()
           throws java.io.IOException
```
    Closes the underlying POIFSFileSystem from which the Workbook was read, if any.
    Once this has been called, no further operations, updates or reads should be performed on the Workbook.
    
    Specified by:
    
    close in interface java.io.Closeable
    
    Specified by:
    
    close in interface java.lang.AutoCloseable
    
    Specified by:
    
    close in interface Workbook
    
    Overrides:
    
    close in class POIDocument
    
    Throws:
    
    java.io.IOException
  - write
```
public void write()
           throws java.io.IOException
```
    Write out this workbook to the currently open File via the writeable POIFSFileSystem it was opened as.
    This will fail (with an IllegalStateException if the Workbook was opened read-only, opened from an InputStream instead of a File, or if this is not the root document. For those cases, you must use write(OutputStream) or write(File) to write to a brand new document.
    
    Specified by:
    
    write in class POIDocument
    
    Throws:
    
    java.io.IOException - thrown on errors writing to the file
  - write
```
public void write(java.io.File newFile)
           throws java.io.IOException
```
    Method write - write out this workbook to a new File. Constructs a new POI POIFSFileSystem, passes in the workbook binary representation and writes it out. If the file exists, it will be replaced, otherwise a new one will be created.
    Note that you cannot write to the currently open File using this method. If you opened your Workbook from a File, you must use the write() method instead!
    
    Specified by:
    
    write in class POIDocument
    
    Parameters:
    
    newFile - The new File you wish to write the XLS to
    
    Throws:
    
    java.io.IOException - if anything can't be written.
    
    See Also:
    
    POIFSFileSystem
  - write
```
public void write(java.io.OutputStream stream)
           throws java.io.IOException
```
    Method write - write out this workbook to an OutputStream. Constructs a new POI POIFSFileSystem, passes in the workbook binary representation and writes it out.
    If stream is a FileOutputStream on a networked drive or has a high cost/latency associated with each written byte, consider wrapping the OutputStream in a BufferedOutputStream to improve write performance.
    
    Specified by:
    
    write in interface Workbook
    
    Specified by:
    
    write in class POIDocument
    
    Parameters:
    
    stream - - the java OutputStream you wish to write the XLS to
    
    Throws:
    
    java.io.IOException - if anything can't be written.
    
    See Also:
    
    POIFSFileSystem
  - getBytes
```
public byte[] getBytes()
```
    Method getBytes - get the bytes of just the HSSF portions of the XLS file. Use this to construct a POI POIFSFileSystem yourself.
    
    Returns:
    
    byte[] array containing the binary representation of this workbook and all contained sheets, rows, cells, etc.
  - getWorkbook
```
@Internal
public InternalWorkbook getWorkbook()
```
  - getNumberOfNames
```
public int getNumberOfNames()
```
    Specified by:
    
    getNumberOfNames in interface Workbook
    
    Returns:
    
    the total number of defined names in this workbook
  - getName
```
public HSSFName getName(java.lang.String name)
```
    Specified by:
    
    getName in interface Workbook
    
    Parameters:
    
    name - the name of the defined name
    
    Returns:
    
    the defined name with the specified name. null if not found.
  - getNames
```
public java.util.List<HSSFName> getNames(java.lang.String name)
```
    Description copied from interface: Workbook
    
    Returns all defined names with the given name.
    
    Specified by:
    
    getNames in interface Workbook
    
    Parameters:
    
    name - the name of the defined name
    
    Returns:
    
    a list of the defined names with the specified name. An empty list is returned if none is found.
  - getAllNames
```
public java.util.List<HSSFName> getAllNames()
```
    Description copied from interface: Workbook
    
    Returns all defined names.
    
    Specified by:
    
    getAllNames in interface Workbook
    
    Returns:
    
    a list of the defined names. An empty list is returned if none is found.
  - getNameRecord
```
public NameRecord getNameRecord(int nameIndex)
```
  - getNameName
```
public java.lang.String getNameName(int index)
```
    gets the named range name
    
    Parameters:
    
    index - the named range index (0 based)
    
    Returns:
    
    named range name
  - setPrintArea
```
public void setPrintArea(int sheetIndex,
                         java.lang.String reference)
```
    Sets the printarea for the sheet provided
    i.e. Reference = $A$1:$B$2
    
    Specified by:
    
    setPrintArea in interface Workbook
    
    Parameters:
    
    sheetIndex - Zero-based sheet index (0 Represents the first sheet to keep consistent with java)
    
    reference - Valid name Reference for the Print Area
  - setPrintArea
```
public void setPrintArea(int sheetIndex,
                         int startColumn,
                         int endColumn,
                         int startRow,
                         int endRow)
```
    For the Convenience of Java Programmers maintaining pointers.
    
    Specified by:
    
    setPrintArea in interface Workbook
    
    Parameters:
    
    sheetIndex - Zero-based sheet index (0 = First Sheet)
    
    startColumn - Column to begin printarea
    
    endColumn - Column to end the printarea
    
    startRow - Row to begin the printarea
    
    endRow - Row to end the printarea
    
    See Also:
    
    setPrintArea(int, String)
  - getPrintArea
```
public java.lang.String getPrintArea(int sheetIndex)
```
    Retrieves the reference for the printarea of the specified sheet, the sheet name is appended to the reference even if it was not specified.
    
    Specified by:
    
    getPrintArea in interface Workbook
    
    Parameters:
    
    sheetIndex - Zero-based sheet index (0 Represents the first sheet to keep consistent with java)
    
    Returns:
    
    String Null if no print area has been defined
  - removePrintArea
```
public void removePrintArea(int sheetIndex)
```
    Delete the printarea for the sheet specified
    
    Specified by:
    
    removePrintArea in interface Workbook
    
    Parameters:
    
    sheetIndex - Zero-based sheet index (0 = First Sheet)
  - createName
```
public HSSFName createName()
```
    creates a new named range and add it to the model
    
    Specified by:
    
    createName in interface Workbook
    
    Returns:
    
    named range high level
  - createDataFormat
```
public HSSFDataFormat createDataFormat()
```
    Returns the instance of HSSFDataFormat for this workbook.
    
    Specified by:
    
    createDataFormat in interface Workbook
    
    Returns:
    
    the HSSFDataFormat object
    
    See Also:
    
    FormatRecord, Record
  - removeName
```
public void removeName(Name name)
```
    Remove a name.
    
    Specified by:
    
    removeName in interface Workbook
    
    Parameters:
    
    name - the name to remove.
  - getCustomPalette
```
public HSSFPalette getCustomPalette()
```
  - insertChartRecord
```
public void insertChartRecord()
```
    Test only. Do not use
  - dumpDrawingGroupRecords
```
public void dumpDrawingGroupRecords(boolean fat)
```
    Spits out a list of all the drawing records in the workbook.
  - addPicture
```
public int addPicture(byte[] pictureData,
                      int format)
```
    Adds a picture to the workbook.
    
    Specified by:
    
    addPicture in interface Workbook
    
    Parameters:
    
    pictureData - The bytes of the picture
    
    format - The format of the picture. One of PICTURE_TYPE_*
    
    Returns:
    
    the index to this picture (1 based).
    
    See Also:
    
    Workbook.PICTURE_TYPE_WMF, Workbook.PICTURE_TYPE_EMF, Workbook.PICTURE_TYPE_PICT, Workbook.PICTURE_TYPE_PNG, Workbook.PICTURE_TYPE_JPEG, Workbook.PICTURE_TYPE_DIB
  - getAllPictures
```
public java.util.List<HSSFPictureData> getAllPictures()
```
    Gets all pictures from the Workbook.
    
    Specified by:
    
    getAllPictures in interface Workbook
    
    Returns:
    
    the list of pictures (a list of HSSFPictureData objects.)
  - addOlePackage
```
public int addOlePackage(POIFSFileSystem poiData,
                         java.lang.String label,
                         java.lang.String fileName,
                         java.lang.String command)
                  throws java.io.IOException
```
    Adds an OLE package manager object with the given POIFS to the sheet
    
    Parameters:
    
    poiData - an POIFS containing the embedded document, to be added
    
    label - the label of the payload
    
    fileName - the original filename
    
    command - the command to open the payload
    
    Returns:
    
    the index of the added ole object
    
    Throws:
    
    java.io.IOException - if the object can't be embedded
  - addOlePackage
```
public int addOlePackage(byte[] oleData,
                         java.lang.String label,
                         java.lang.String fileName,
                         java.lang.String command)
                  throws java.io.IOException
```
    Description copied from interface: Workbook
    
    Adds an OLE package manager object with the given content to the sheet
    
    Specified by:
    
    addOlePackage in interface Workbook
    
    Parameters:
    
    oleData - the payload
    
    label - the label of the payload
    
    fileName - the original filename
    
    command - the command to open the payload
    
    Returns:
    
    the index of the added ole object, i.e. the storage id
    
    Throws:
    
    java.io.IOException - if the object can't be embedded
  - linkExternalWorkbook
```
public int linkExternalWorkbook(java.lang.String name,
                                Workbook workbook)
```
    Adds the LinkTable records required to allow formulas referencing the specified external workbook to be added to this one. Allows formulas such as "[MyOtherWorkbook]Sheet3!$A$5" to be added to the file, for workbooks not already referenced.
    
    Specified by:
    
    linkExternalWorkbook in interface Workbook
    
    Parameters:
    
    name - The name the workbook will be referenced as in formulas
    
    workbook - The open workbook to fetch the link required information from
  - isWriteProtected
```
public boolean isWriteProtected()
```
    Is the workbook protected with a password (not encrypted)?
  - writeProtectWorkbook
```
public void writeProtectWorkbook(java.lang.String password,
                                 java.lang.String username)
```
    protect a workbook with a password (not encypted, just sets writeprotect flags and the password.
    
    Parameters:
    
    password - to set
  - unwriteProtectWorkbook
```
public void unwriteProtectWorkbook()
```
    removes the write protect flag
  - getAllEmbeddedObjects
```
public java.util.List<HSSFObjectData> getAllEmbeddedObjects()
```
    Gets all embedded OLE2 objects from the Workbook.
    
    Returns:
    
    the list of embedded objects (a list of HSSFObjectData objects.)
  - getCreationHelper
```
public HSSFCreationHelper getCreationHelper()
```
    Description copied from interface: Workbook
    
    Returns an object that handles instantiating concrete classes of the various instances one needs for HSSF and XSSF.
    
    Specified by:
    
    getCreationHelper in interface Workbook
  - addToolPack
```
public void addToolPack(UDFFinder toopack)
```
    Register a new toolpack in this workbook.
    
    Specified by:
    
    addToolPack in interface Workbook
    
    Parameters:
    
    toopack - the toolpack to register
  - setForceFormulaRecalculation
```
public void setForceFormulaRecalculation(boolean value)
```
    Whether the application shall perform a full recalculation when the workbook is opened.
    Typically you want to force formula recalculation when you modify cell formulas or values of a workbook previously created by Excel. When set to true, this flag will tell Excel that it needs to recalculate all formulas in the workbook the next time the file is opened.
    
    Note, that recalculation updates cached formula results and, thus, modifies the workbook. Depending on the version, Excel may prompt you with "Do you want to save the changes in filename?" on close.
    
    Specified by:
    
    setForceFormulaRecalculation in interface Workbook
    
    Parameters:
    
    value - true if the application will perform a full recalculation of workbook values when the workbook is opened
    
    Since:
    
    3.8
  - getForceFormulaRecalculation
```
public boolean getForceFormulaRecalculation()
```
    Whether Excel will be asked to recalculate all formulas when the workbook is opened.
    
    Specified by:
    
    getForceFormulaRecalculation in interface Workbook
    
    Since:
    
    3.8
  - changeExternalReference
```
public boolean changeExternalReference(java.lang.String oldUrl,
                                       java.lang.String newUrl)
```
    Changes an external referenced file to another file. A formula in Excel which references a cell in another file is saved in two parts: The referenced file is stored in an reference table. the row/cell information is saved separate. This method invocation will only change the reference in the lookup-table itself.
    
    Parameters:
    
    oldUrl - The old URL to search for and which is to be replaced
    
    newUrl - The URL replacement
    
    Returns:
    
    true if the oldUrl was found and replaced with newUrl. Otherwise false
  - getInternalWorkbook
```
@Internal
public InternalWorkbook getInternalWorkbook()
```
  - getSpreadsheetVersion
```
public SpreadsheetVersion getSpreadsheetVersion()
```
    Returns the spreadsheet version (EXCLE97) of this workbook
    
    Specified by:
    
    getSpreadsheetVersion in interface Workbook
    
    Returns:
    
    EXCEL97 SpreadsheetVersion enum
    
    Since:
    
    3.14 beta 2
  - getEncryptionInfo
```
public EncryptionInfo getEncryptionInfo()
```
    Overrides:
    
    getEncryptionInfo in class POIDocument
    
    Returns:
    
    the encryption info if the document is encrypted, otherwise null
  - createEvaluationWorkbook
```
public HSSFEvaluationWorkbook createEvaluationWorkbook()
```
    Specified by:
    
    createEvaluationWorkbook in interface Workbook
    
    Returns:
    
    an evaluation workbook

Class HSSFWorkbook

Field Summary

Fields inherited from interface org.apache.poi.ss.usermodel.Workbook

Constructor Summary

Method Summary

Methods inherited from class org.apache.poi.POIDocument

Methods inherited from class java.lang.Object

Methods inherited from interface java.lang.Iterable

Field Detail

INITIAL_CAPACITY

_sheets

Constructor Detail

HSSFWorkbook

HSSFWorkbook

HSSFWorkbook

HSSFWorkbook

HSSFWorkbook

HSSFWorkbook

HSSFWorkbook

Method Detail

create

getWorkbookDirEntryName

getMissingCellPolicy

setMissingCellPolicy

setSheetOrder

setSelectedTab

setSelectedTabs

setSelectedTabs

getSelectedTabs

setActiveSheet

getActiveSheetIndex

setFirstVisibleTab

getFirstVisibleTab

setSheetName

getSheetName

isHidden

setHidden

isSheetHidden

isSheetVeryHidden

getSheetVisibility

setSheetHidden

setSheetVisibility

getSheetIndex

getSheetIndex

createSheet

cloneSheet

createSheet

sheetIterator

iterator

getNumberOfSheets

getSheetAt

getSheet

removeSheetAt

setBackupFlag

getBackupFlag

createFont

findFont

getNumberOfFonts

getNumberOfFontsAsInt

getFontAt

createCellStyle

getNumCellStyles

getCellStyleAt

close

write

write

write

getBytes

getWorkbook

getNumberOfNames

getName

getNames

getAllNames

getNameRecord

getNameName

setPrintArea

setPrintArea

getPrintArea

removePrintArea

createName