Direct Known Subclasses:

AVI_Reader, FileInfoVirtualStack, ListVirtualStack, PlotVirtualStack
```
public class VirtualStack
extends ImageStack
```
This class represents an array of disk-resident images.

Constructor Summary

Constructors
Constructor	Description
`VirtualStack()`	Default constructor.
`VirtualStack(int width, int height)`
`VirtualStack(int width, int height, int slices)`	Creates a virtual stack with no backing storage.
`VirtualStack(int width, int height, ColorModel cm, String path)`	Creates an empty virtual stack.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addSlice(String fileName)`	Adds an image to the end of the stack.
`void`	`addSlice(String sliceLabel, ImageProcessor ip)`	Does nothing..
`void`	`addSlice(String sliceLabel, ImageProcessor ip, int n)`	Does noting.
`void`	`addSlice(String sliceLabel, Object pixels)`	Does nothing.
`void`	`deleteLastSlice()`	Deletes the last slice in the stack.
`void`	`deleteSlice(int n)`	Deletes the specified slice, were 1<=n<=nslices.
`int`	`getBitDepth()`	Returns the bit depth (8, 16, 24 or 32), or 0 if the bit depth is not known.
`String`	`getDirectory()`	Returns the path to the directory containing the images.
`String`	`getFileName(int n)`	Returns the file name of the specified slice, were 1<=n<=nslices.
`Object[]`	`getImageArray()`	Returns null.
`Object`	`getPixels(int n)`	Returns the pixel array for the specified slice, were 1<=n<=nslices.
`ImageProcessor`	`getProcessor(int n)`	Returns an ImageProcessor for the specified slice, were 1<=n<=nslices.
`Properties`	`getProperties()`	Returns the ImagePlus Properties assoctated with the current slice, or null.
`int`	`getSize()`	Returns the number of slices in this stack.
`String`	`getSliceLabel(int n)`	Returns the label of the Nth image.
`boolean`	`isVirtual()`	Always return true.
`int`	`saveChanges(int n)`	Currently not implemented
`void`	`setBitDepth(int bitDepth)`	Sets the bit depth (8, 16, 24 or 32).
`void`	`setPixels(Object pixels, int n)`	Assigns a pixel array to the specified slice, were 1<=n<=nslices.
`void`	`setSliceLabel(String label, int n)`	Does nothing.
`ImageStack`	`sortDicom(String[] strings, String[] info, int maxDigits)`
`void`	`trim()`	Does nothing.

Methods inherited from class ij.ImageStack
addSlice, addUnsignedShortSlice, convertToFloat, create, crop, drawSphere, duplicate, getColorModel, getHeight, getRoi, getShortSliceLabel, getSliceLabels, getVoxel, getVoxels, getVoxels, getWidth, isHSB, isLab, isRGB, setColorModel, setProcessor, setRoi, setVoxel, setVoxels, setVoxels, size, toString, update

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

- Constructor Detail
  - VirtualStack
```
public VirtualStack()
```
    Default constructor.
  - VirtualStack
```
public VirtualStack(int width,
                    int height)
```
  - VirtualStack
```
public VirtualStack(int width,
                    int height,
                    ColorModel cm,
                    String path)
```
    Creates an empty virtual stack.
    
    Parameters:
    
    width - image width
    
    height - image height
    
    cm - ColorModel or null
    
    path - file path of directory containing the images
    
    See Also:
    
    addSlice(String), OpenAsVirtualStack.js
  - VirtualStack
```
public VirtualStack(int width,
                    int height,
                    int slices)
```
    Creates a virtual stack with no backing storage. This example creates a one million slice virtual stack that uses just 1MB of RAM:
    stack = new VirtualStack(1024,1024,1000000); new ImagePlus("No Backing Store Virtual Stack",stack).show();
- Method Detail
  - addSlice
```
public void addSlice(String fileName)
```
    Adds an image to the end of the stack. The argument can be a full file path (e.g., "C:/Users/wayne/dir1/image.tif") if the 'path' argument in the constructor is "". File names that start with '.' are ignored.
  - addSlice
```
public void addSlice(String sliceLabel,
                     Object pixels)
```
    Does nothing.
    
    Overrides:
    
    addSlice in class ImageStack
  - addSlice
```
public void addSlice(String sliceLabel,
                     ImageProcessor ip)
```
    Does nothing..
    
    Overrides:
    
    addSlice in class ImageStack
  - addSlice
```
public void addSlice(String sliceLabel,
                     ImageProcessor ip,
                     int n)
```
    Does noting.
    
    Overrides:
    
    addSlice in class ImageStack
  - deleteSlice
```
public void deleteSlice(int n)
```
    Deletes the specified slice, were 1<=n<=nslices.
    
    Overrides:
    
    deleteSlice in class ImageStack
  - deleteLastSlice
```
public void deleteLastSlice()
```
    Deletes the last slice in the stack.
    
    Overrides:
    
    deleteLastSlice in class ImageStack
  - getPixels
```
public Object getPixels(int n)
```
    Returns the pixel array for the specified slice, were 1<=n<=nslices.
    
    Overrides:
    
    getPixels in class ImageStack
  - setPixels
```
public void setPixels(Object pixels,
                      int n)
```
    Assigns a pixel array to the specified slice, were 1<=n<=nslices.
    
    Overrides:
    
    setPixels in class ImageStack
  - getProcessor
```
public ImageProcessor getProcessor(int n)
```
    Returns an ImageProcessor for the specified slice, were 1<=n<=nslices. Returns null if the stack is empty.
    
    Overrides:
    
    getProcessor in class ImageStack
  - saveChanges
```
public int saveChanges(int n)
```
    Currently not implemented
  - getSize
```
public int getSize()
```
    Returns the number of slices in this stack.
    
    Overrides:
    
    getSize in class ImageStack
  - getSliceLabel
```
public String getSliceLabel(int n)
```
    Returns the label of the Nth image.
    
    Overrides:
    
    getSliceLabel in class ImageStack
  - getImageArray
```
public Object[] getImageArray()
```
    Returns null.
    
    Overrides:
    
    getImageArray in class ImageStack
  - setSliceLabel
```
public void setSliceLabel(String label,
                          int n)
```
    Does nothing.
    
    Overrides:
    
    setSliceLabel in class ImageStack
  - isVirtual
```
public boolean isVirtual()
```
    Always return true.
    
    Overrides:
    
    isVirtual in class ImageStack
  - trim
```
public void trim()
```
    Does nothing.
    
    Overrides:
    
    trim in class ImageStack
  - getDirectory
```
public String getDirectory()
```
    Returns the path to the directory containing the images.
  - getFileName
```
public String getFileName(int n)
```
    Returns the file name of the specified slice, were 1<=n<=nslices.
  - setBitDepth
```
public void setBitDepth(int bitDepth)
```
    Sets the bit depth (8, 16, 24 or 32).
  - getBitDepth
```
public int getBitDepth()
```
    Returns the bit depth (8, 16, 24 or 32), or 0 if the bit depth is not known.
    
    Overrides:
    
    getBitDepth in class ImageStack
  - sortDicom
```
public ImageStack sortDicom(String[] strings,
                            String[] info,
                            int maxDigits)
```
  - getProperties
```
public Properties getProperties()
```
    Returns the ImagePlus Properties assoctated with the current slice, or null.

Class VirtualStack

Constructor Summary

Method Summary

Methods inherited from class ij.ImageStack

Methods inherited from class java.lang.Object

Constructor Detail

VirtualStack

VirtualStack

VirtualStack

VirtualStack

Method Detail

addSlice

addSlice

addSlice

addSlice

deleteSlice

deleteLastSlice

getPixels

setPixels

getProcessor

saveChanges

getSize

getSliceLabel

getImageArray

setSliceLabel

isVirtual

trim

getDirectory

getFileName

setBitDepth

getBitDepth

sortDicom

getProperties