File getUsableSpace() method in java with examples
The getUsableSpace() function is a part of File class in Java . This function returns the unallocated size of the partition denoted by the abstract pathname, if the pathname does not exist then it returns 0L. This function is more accurate than the getFreeSpace() function as it returns the free space allocated to this virtual machine. This function gives a hint of the unallocated space of the partition but does not give any guarantee that the exact number of bytes is Usable. An error might be caused if an external application writes to the specified file, then the write operation might not succeed. If there is no clear distinction it will return the same value as getFreeSapce() method.
public long getUsableSpace()
long var = file.getUsableSpace();
Parameters: This method does not accept any parameter.
Return Value: The function returns long data type represents unallocated size of the partition in bytes
Exception: This method throws SecurityException if the method does not allow file to be created
Below programs illustrates the use of getUsableSpace() function:
Example 1: The file “F:\\program.txt” is a existing file in F: Directory .
Usable Space: 174491860992
Example 2: The file “F:\\program1.txt” does not exist file in F: Directory .
Usable Space: 0
Note: The programs might not run in an online IDE. Please use an offline IDE and set the path of the file.
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