95 
  96     /**
  97      * Returns the number of bytes available to this Java virtual machine on the
  98      * file store.
  99      *
 100      * <p> The returned number of available bytes is a hint, but not a
 101      * guarantee, that it is possible to use most or any of these bytes.  The
 102      * number of usable bytes is most likely to be accurate immediately
 103      * after the space attributes are obtained. It is likely to be made inaccurate
 104      * by any external I/O operations including those made on the system outside
 105      * of this Java virtual machine.
 106      *
 107      * @return  the number of bytes available
 108      *
 109      * @throws  IOException
 110      *          if an I/O error occurs
 111      */
 112     public abstract long getUsableSpace() throws IOException;
 113 
 114     /**











 115      * Returns the number of unallocated bytes in the file store.
 116      *
 117      * <p> The returned number of unallocated bytes is a hint, but not a
 118      * guarantee, that it is possible to use most or any of these bytes.  The
 119      * number of unallocated bytes is most likely to be accurate immediately
 120      * after the space attributes are obtained. It is likely to be
 121      * made inaccurate by any external I/O operations including those made on
 122      * the system outside of this virtual machine.
 123      *
 124      * @return  the number of unallocated bytes
 125      *
 126      * @throws  IOException
 127      *          if an I/O error occurs
 128      */
 129     public abstract long getUnallocatedSpace() throws IOException;
 130 
 131     /**
 132      * Tells whether or not this file store supports the file attributes
 133      * identified by the given file attribute view.
 134      *

  95 
  96     /**
  97      * Returns the number of bytes available to this Java virtual machine on the
  98      * file store.
  99      *
 100      * <p> The returned number of available bytes is a hint, but not a
 101      * guarantee, that it is possible to use most or any of these bytes.  The
 102      * number of usable bytes is most likely to be accurate immediately
 103      * after the space attributes are obtained. It is likely to be made inaccurate
 104      * by any external I/O operations including those made on the system outside
 105      * of this Java virtual machine.
 106      *
 107      * @return  the number of bytes available
 108      *
 109      * @throws  IOException
 110      *          if an I/O error occurs
 111      */
 112     public abstract long getUsableSpace() throws IOException;
 113 
 114     /**
 115      * Returns block size in Bytes to this Java virtual machine on the file
 116      * store.
 117      *
 118      * @return  block size
 119      *
 120      * @throws IOException
 121      *         if an I/O error occurs
 122      */         
 123     public abstract int getBlockSize() throws IOException;
 124 
 125     /**
 126      * Returns the number of unallocated bytes in the file store.
 127      *
 128      * <p> The returned number of unallocated bytes is a hint, but not a
 129      * guarantee, that it is possible to use most or any of these bytes.  The
 130      * number of unallocated bytes is most likely to be accurate immediately
 131      * after the space attributes are obtained. It is likely to be
 132      * made inaccurate by any external I/O operations including those made on
 133      * the system outside of this virtual machine.
 134      *
 135      * @return  the number of unallocated bytes
 136      *
 137      * @throws  IOException
 138      *          if an I/O error occurs
 139      */
 140     public abstract long getUnallocatedSpace() throws IOException;
 141 
 142     /**
 143      * Tells whether or not this file store supports the file attributes
 144      * identified by the given file attribute view.
 145      *